./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-word-symm.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/chl-word-symm.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 80b1b132 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/chl-word-symm.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/chl-word-symm.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-?-80b1b13-m [2024-01-31 16:52:18,261 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:52:18,314 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:52:18,317 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:52:18,318 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:52:18,354 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:52:18,356 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:52:18,356 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:52:18,357 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:52:18,360 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:52:18,367 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:52:18,367 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:52:18,368 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:52:18,369 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:52:18,370 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:52:18,370 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:52:18,370 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:52:18,370 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:52:18,370 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:52:18,371 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:52:18,371 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:52:18,371 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:52:18,371 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:52:18,371 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:52:18,372 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:52:18,372 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:52:18,372 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:52:18,372 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:52:18,373 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:52:18,373 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:52:18,374 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:52:18,374 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:52:18,374 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:52:18,374 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:52:18,374 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:52:18,374 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:52:18,374 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:52:18,375 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:52:18,375 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:52:18,375 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:52:18,375 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:52:18,375 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:52:18,376 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:52:18,376 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:52:18,575 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:52:18,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:52:18,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:52:18,594 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:52:18,595 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:52:18,596 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/chl-word-symm.wvr.yml/witness.yml [2024-01-31 16:52:18,775 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:52:18,776 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:52:18,777 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-word-symm.wvr.c [2024-01-31 16:52:19,935 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:52:20,111 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:52:20,112 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-symm.wvr.c [2024-01-31 16:52:20,118 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1bc75998/8fc56b23053046ad92764cc533dec09a/FLAG9ff6320ab [2024-01-31 16:52:20,134 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1bc75998/8fc56b23053046ad92764cc533dec09a [2024-01-31 16:52:20,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:52:20,135 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:52:20,138 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:52:20,138 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:52:20,142 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:52:20,143 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:52:18" (1/2) ... [2024-01-31 16:52:20,144 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aa5600e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:52:20, skipping insertion in model container [2024-01-31 16:52:20,144 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:52:18" (1/2) ... [2024-01-31 16:52:20,146 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@13bb922a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:52:20, skipping insertion in model container [2024-01-31 16:52:20,146 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:52:20" (2/2) ... [2024-01-31 16:52:20,146 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aa5600e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:52:20, skipping insertion in model container [2024-01-31 16:52:20,147 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:52:20" (2/2) ... [2024-01-31 16:52:20,147 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:52:20,204 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:52:20,205 INFO L98 nessWitnessExtractor]: Location invariant after [L47-L47] ((unsigned long )_argptr == 0UL) && (stop == (_Bool)0 || stop == (_Bool)1) [2024-01-31 16:52:20,205 INFO L98 nessWitnessExtractor]: Location invariant after [L67-L67] ((unsigned long )_argptr == 0UL) && (stop == (_Bool)0 || stop == (_Bool)1) [2024-01-31 16:52:20,225 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:52:20,392 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-symm.wvr.c[2874,2887] [2024-01-31 16:52:20,411 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:52:20,419 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 16:52:20,437 WARN L424 MainDispatcher]: Unable to annotate _Bool with a witness entry [2024-01-31 16:52:20,439 WARN L424 MainDispatcher]: Unable to annotate _Bool with a witness entry [2024-01-31 16:52:20,447 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-symm.wvr.c[2874,2887] [2024-01-31 16:52:20,451 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:52:20,465 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:52:20,466 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:52:20 WrapperNode [2024-01-31 16:52:20,466 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:52:20,467 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:52:20,467 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:52:20,468 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:52:20,474 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:52:20" (1/1) ... [2024-01-31 16:52:20,481 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:52:20" (1/1) ... [2024-01-31 16:52:20,534 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 135 [2024-01-31 16:52:20,534 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:52:20,536 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:52:20,536 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:52:20,536 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:52:20,544 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:52:20" (1/1) ... [2024-01-31 16:52:20,545 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:52:20" (1/1) ... [2024-01-31 16:52:20,564 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:52:20" (1/1) ... [2024-01-31 16:52:20,577 INFO L175 MemorySlicer]: Split 16 memory accesses to 4 slices as follows [2, 10, 2, 2]. 63 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 4 writes are split as follows [0, 2, 1, 1]. [2024-01-31 16:52:20,577 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:52:20" (1/1) ... [2024-01-31 16:52:20,577 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:52:20" (1/1) ... [2024-01-31 16:52:20,586 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:52:20" (1/1) ... [2024-01-31 16:52:20,589 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:52:20" (1/1) ... [2024-01-31 16:52:20,591 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:52:20" (1/1) ... [2024-01-31 16:52:20,592 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:52:20" (1/1) ... [2024-01-31 16:52:20,594 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:52:20,594 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:52:20,594 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:52:20,594 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:52:20,595 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:52:20" (1/1) ... [2024-01-31 16:52:20,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:52:20,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:20,622 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-31 16:52:20,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-31 16:52:20,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:52:20,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 16:52:20,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 16:52:20,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 16:52:20,655 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 16:52:20,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:52:20,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:52:20,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:52:20,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 16:52:20,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:52:20,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:52:20,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:52:20,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:52:20,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 16:52:20,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-31 16:52:20,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:52:20,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:52:20,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 16:52:20,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 16:52:20,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 16:52:20,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 16:52:20,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:52:20,661 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 16:52:20,746 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:52:20,748 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:52:20,995 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:52:20,995 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:52:21,212 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:52:21,213 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-01-31 16:52:21,213 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:52:21 BoogieIcfgContainer [2024-01-31 16:52:21,214 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:52:21,216 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:52:21,217 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:52:21,219 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:52:21,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:52:18" (1/4) ... [2024-01-31 16:52:21,220 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f33bb2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:52:21, skipping insertion in model container [2024-01-31 16:52:21,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:52:20" (2/4) ... [2024-01-31 16:52:21,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f33bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:52:21, skipping insertion in model container [2024-01-31 16:52:21,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:52:20" (3/4) ... [2024-01-31 16:52:21,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f33bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:52:21, skipping insertion in model container [2024-01-31 16:52:21,222 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:52:21" (4/4) ... [2024-01-31 16:52:21,223 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2024-01-31 16:52:21,237 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:52:21,237 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 16:52:21,238 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:52:21,282 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 16:52:21,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 35 transitions, 84 flow [2024-01-31 16:52:21,347 INFO L124 PetriNetUnfolderBase]: 8/33 cut-off events. [2024-01-31 16:52:21,347 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:52:21,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 8/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 44 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-01-31 16:52:21,351 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 35 transitions, 84 flow [2024-01-31 16:52:21,355 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 32 transitions, 76 flow [2024-01-31 16:52:21,366 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:52:21,371 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@170166a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:52:21,372 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-31 16:52:21,380 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:52:21,383 INFO L124 PetriNetUnfolderBase]: 8/31 cut-off events. [2024-01-31 16:52:21,383 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:52:21,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:21,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:21,385 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:21,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:21,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1731729370, now seen corresponding path program 1 times [2024-01-31 16:52:21,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:21,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144569261] [2024-01-31 16:52:21,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:21,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:21,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:21,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:21,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:21,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144569261] [2024-01-31 16:52:21,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144569261] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:52:21,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:52:21,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:52:21,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087001614] [2024-01-31 16:52:21,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:21,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:52:22,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:22,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:52:22,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:52:22,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:22,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 32 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:22,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:22,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:22,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:22,257 INFO L124 PetriNetUnfolderBase]: 282/462 cut-off events. [2024-01-31 16:52:22,257 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-01-31 16:52:22,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 956 conditions, 462 events. 282/462 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1568 event pairs, 144 based on Foata normal form. 1/357 useless extension candidates. Maximal degree in co-relation 824. Up to 358 conditions per place. [2024-01-31 16:52:22,264 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 42 selfloop transitions, 1 changer transitions 8/52 dead transitions. [2024-01-31 16:52:22,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 52 transitions, 230 flow [2024-01-31 16:52:22,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:52:22,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:52:22,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2024-01-31 16:52:22,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-01-31 16:52:22,276 INFO L175 Difference]: Start difference. First operand has 31 places, 32 transitions, 76 flow. Second operand 4 states and 65 transitions. [2024-01-31 16:52:22,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 52 transitions, 230 flow [2024-01-31 16:52:22,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 52 transitions, 214 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 16:52:22,281 INFO L231 Difference]: Finished difference. Result has 32 places, 32 transitions, 77 flow [2024-01-31 16:52:22,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=77, PETRI_PLACES=32, PETRI_TRANSITIONS=32} [2024-01-31 16:52:22,285 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2024-01-31 16:52:22,286 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 32 transitions, 77 flow [2024-01-31 16:52:22,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:22,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:22,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:22,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:52:22,287 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:22,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:22,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1419590832, now seen corresponding path program 2 times [2024-01-31 16:52:22,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:22,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941880379] [2024-01-31 16:52:22,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:22,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:22,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:22,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:22,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941880379] [2024-01-31 16:52:22,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941880379] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:52:22,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:52:22,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:52:22,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903852933] [2024-01-31 16:52:22,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:22,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:52:22,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:22,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:52:22,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:52:22,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:22,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 32 transitions, 77 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:22,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:22,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:22,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:22,615 INFO L124 PetriNetUnfolderBase]: 328/557 cut-off events. [2024-01-31 16:52:22,615 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2024-01-31 16:52:22,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1183 conditions, 557 events. 328/557 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2099 event pairs, 182 based on Foata normal form. 7/462 useless extension candidates. Maximal degree in co-relation 1166. Up to 422 conditions per place. [2024-01-31 16:52:22,618 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 42 selfloop transitions, 1 changer transitions 10/54 dead transitions. [2024-01-31 16:52:22,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 54 transitions, 237 flow [2024-01-31 16:52:22,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:52:22,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:52:22,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-01-31 16:52:22,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-01-31 16:52:22,620 INFO L175 Difference]: Start difference. First operand has 32 places, 32 transitions, 77 flow. Second operand 4 states and 67 transitions. [2024-01-31 16:52:22,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 54 transitions, 237 flow [2024-01-31 16:52:22,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 54 transitions, 231 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-01-31 16:52:22,622 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 83 flow [2024-01-31 16:52:22,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=83, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2024-01-31 16:52:22,623 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2024-01-31 16:52:22,623 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 83 flow [2024-01-31 16:52:22,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:22,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:22,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:22,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:52:22,624 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:22,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:22,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1626241867, now seen corresponding path program 1 times [2024-01-31 16:52:22,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:22,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288747453] [2024-01-31 16:52:22,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:22,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:22,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:22,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288747453] [2024-01-31 16:52:22,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288747453] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:52:22,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:52:22,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:52:22,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054474144] [2024-01-31 16:52:22,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:22,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:52:22,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:22,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:52:22,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:52:22,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:22,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:22,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:22,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:22,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:22,719 INFO L124 PetriNetUnfolderBase]: 232/388 cut-off events. [2024-01-31 16:52:22,719 INFO L125 PetriNetUnfolderBase]: For 161/161 co-relation queries the response was YES. [2024-01-31 16:52:22,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 844 conditions, 388 events. 232/388 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1231 event pairs, 79 based on Foata normal form. 22/344 useless extension candidates. Maximal degree in co-relation 834. Up to 317 conditions per place. [2024-01-31 16:52:22,721 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 34 selfloop transitions, 2 changer transitions 6/43 dead transitions. [2024-01-31 16:52:22,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 43 transitions, 195 flow [2024-01-31 16:52:22,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:52:22,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:52:22,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-01-31 16:52:22,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047619047619047 [2024-01-31 16:52:22,723 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 83 flow. Second operand 3 states and 53 transitions. [2024-01-31 16:52:22,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 43 transitions, 195 flow [2024-01-31 16:52:22,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 43 transitions, 192 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-01-31 16:52:22,724 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 86 flow [2024-01-31 16:52:22,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2024-01-31 16:52:22,725 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2024-01-31 16:52:22,725 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 86 flow [2024-01-31 16:52:22,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:22,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:22,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:22,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 16:52:22,726 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:22,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:22,727 INFO L85 PathProgramCache]: Analyzing trace with hash -356678929, now seen corresponding path program 1 times [2024-01-31 16:52:22,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:22,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056276881] [2024-01-31 16:52:22,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:22,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:22,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:22,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:22,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056276881] [2024-01-31 16:52:22,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056276881] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:52:22,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:52:22,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:52:22,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808081645] [2024-01-31 16:52:22,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:22,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:52:22,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:22,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:52:22,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:52:22,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:22,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 86 flow. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:22,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:22,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:22,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:23,124 INFO L124 PetriNetUnfolderBase]: 456/738 cut-off events. [2024-01-31 16:52:23,124 INFO L125 PetriNetUnfolderBase]: For 179/179 co-relation queries the response was YES. [2024-01-31 16:52:23,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1653 conditions, 738 events. 456/738 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2692 event pairs, 200 based on Foata normal form. 1/599 useless extension candidates. Maximal degree in co-relation 606. Up to 304 conditions per place. [2024-01-31 16:52:23,127 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 65 selfloop transitions, 11 changer transitions 1/78 dead transitions. [2024-01-31 16:52:23,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 78 transitions, 363 flow [2024-01-31 16:52:23,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:52:23,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:52:23,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2024-01-31 16:52:23,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-01-31 16:52:23,129 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 86 flow. Second operand 6 states and 92 transitions. [2024-01-31 16:52:23,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 78 transitions, 363 flow [2024-01-31 16:52:23,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 78 transitions, 343 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-01-31 16:52:23,131 INFO L231 Difference]: Finished difference. Result has 39 places, 42 transitions, 153 flow [2024-01-31 16:52:23,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=153, PETRI_PLACES=39, PETRI_TRANSITIONS=42} [2024-01-31 16:52:23,132 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 8 predicate places. [2024-01-31 16:52:23,132 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 42 transitions, 153 flow [2024-01-31 16:52:23,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:23,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:23,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:23,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:52:23,133 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:23,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:23,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1802949554, now seen corresponding path program 1 times [2024-01-31 16:52:23,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:23,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738119394] [2024-01-31 16:52:23,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:23,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:23,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:23,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738119394] [2024-01-31 16:52:23,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738119394] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:23,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078116503] [2024-01-31 16:52:23,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:23,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:23,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:23,361 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) [2024-01-31 16:52:23,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-31 16:52:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:23,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 20 conjunts are in the unsatisfiable core [2024-01-31 16:52:23,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:23,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:24,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:24,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078116503] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:24,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:52:24,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2024-01-31 16:52:24,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781798800] [2024-01-31 16:52:24,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:24,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:52:24,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:24,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:52:24,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2024-01-31 16:52:24,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:24,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 42 transitions, 153 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:24,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:24,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:24,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:25,028 INFO L124 PetriNetUnfolderBase]: 1146/1908 cut-off events. [2024-01-31 16:52:25,028 INFO L125 PetriNetUnfolderBase]: For 294/294 co-relation queries the response was YES. [2024-01-31 16:52:25,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4655 conditions, 1908 events. 1146/1908 cut-off events. For 294/294 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9515 event pairs, 130 based on Foata normal form. 1/1732 useless extension candidates. Maximal degree in co-relation 3174. Up to 383 conditions per place. [2024-01-31 16:52:25,035 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 140 selfloop transitions, 44 changer transitions 8/193 dead transitions. [2024-01-31 16:52:25,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 193 transitions, 996 flow [2024-01-31 16:52:25,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 16:52:25,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 16:52:25,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 207 transitions. [2024-01-31 16:52:25,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45494505494505494 [2024-01-31 16:52:25,037 INFO L175 Difference]: Start difference. First operand has 39 places, 42 transitions, 153 flow. Second operand 13 states and 207 transitions. [2024-01-31 16:52:25,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 193 transitions, 996 flow [2024-01-31 16:52:25,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 193 transitions, 992 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-01-31 16:52:25,040 INFO L231 Difference]: Finished difference. Result has 60 places, 76 transitions, 493 flow [2024-01-31 16:52:25,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=493, PETRI_PLACES=60, PETRI_TRANSITIONS=76} [2024-01-31 16:52:25,040 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 29 predicate places. [2024-01-31 16:52:25,041 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 76 transitions, 493 flow [2024-01-31 16:52:25,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:25,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:25,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:25,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:25,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:25,254 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:25,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:25,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1406322494, now seen corresponding path program 1 times [2024-01-31 16:52:25,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:25,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104854068] [2024-01-31 16:52:25,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:25,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:25,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:25,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:25,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104854068] [2024-01-31 16:52:25,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104854068] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:52:25,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:52:25,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:52:25,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926370561] [2024-01-31 16:52:25,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:25,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:52:25,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:25,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:52:25,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:52:25,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:25,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 76 transitions, 493 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:25,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:25,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:25,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:25,616 INFO L124 PetriNetUnfolderBase]: 1224/2100 cut-off events. [2024-01-31 16:52:25,617 INFO L125 PetriNetUnfolderBase]: For 2589/2589 co-relation queries the response was YES. [2024-01-31 16:52:25,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6413 conditions, 2100 events. 1224/2100 cut-off events. For 2589/2589 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10992 event pairs, 719 based on Foata normal form. 0/1942 useless extension candidates. Maximal degree in co-relation 6360. Up to 1211 conditions per place. [2024-01-31 16:52:25,627 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 104 selfloop transitions, 11 changer transitions 6/122 dead transitions. [2024-01-31 16:52:25,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 122 transitions, 951 flow [2024-01-31 16:52:25,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:52:25,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:52:25,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 86 transitions. [2024-01-31 16:52:25,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-01-31 16:52:25,629 INFO L175 Difference]: Start difference. First operand has 60 places, 76 transitions, 493 flow. Second operand 6 states and 86 transitions. [2024-01-31 16:52:25,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 122 transitions, 951 flow [2024-01-31 16:52:25,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 122 transitions, 936 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-01-31 16:52:25,641 INFO L231 Difference]: Finished difference. Result has 64 places, 73 transitions, 498 flow [2024-01-31 16:52:25,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=498, PETRI_PLACES=64, PETRI_TRANSITIONS=73} [2024-01-31 16:52:25,643 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 33 predicate places. [2024-01-31 16:52:25,643 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 73 transitions, 498 flow [2024-01-31 16:52:25,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:25,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:25,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:25,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 16:52:25,644 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:25,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:25,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1670418632, now seen corresponding path program 1 times [2024-01-31 16:52:25,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:25,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132993200] [2024-01-31 16:52:25,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:25,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:25,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:25,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:25,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132993200] [2024-01-31 16:52:25,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132993200] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:52:25,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:52:25,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:52:25,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026869311] [2024-01-31 16:52:25,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:25,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:52:25,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:25,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:52:25,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:52:25,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:25,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 73 transitions, 498 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:25,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:25,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:25,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:25,898 INFO L124 PetriNetUnfolderBase]: 975/1711 cut-off events. [2024-01-31 16:52:25,898 INFO L125 PetriNetUnfolderBase]: For 2711/2711 co-relation queries the response was YES. [2024-01-31 16:52:25,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5451 conditions, 1711 events. 975/1711 cut-off events. For 2711/2711 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8789 event pairs, 586 based on Foata normal form. 0/1647 useless extension candidates. Maximal degree in co-relation 4540. Up to 1211 conditions per place. [2024-01-31 16:52:25,908 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 83 selfloop transitions, 8 changer transitions 9/101 dead transitions. [2024-01-31 16:52:25,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 101 transitions, 808 flow [2024-01-31 16:52:25,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:52:25,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:52:25,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 80 transitions. [2024-01-31 16:52:25,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-01-31 16:52:25,909 INFO L175 Difference]: Start difference. First operand has 64 places, 73 transitions, 498 flow. Second operand 6 states and 80 transitions. [2024-01-31 16:52:25,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 101 transitions, 808 flow [2024-01-31 16:52:25,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 101 transitions, 798 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-01-31 16:52:25,919 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 463 flow [2024-01-31 16:52:25,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=463, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-01-31 16:52:25,952 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 37 predicate places. [2024-01-31 16:52:25,952 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 463 flow [2024-01-31 16:52:25,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:25,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:25,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:25,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 16:52:25,953 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:25,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:25,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1382740184, now seen corresponding path program 2 times [2024-01-31 16:52:25,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:25,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579419958] [2024-01-31 16:52:25,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:25,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:25,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:26,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:26,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579419958] [2024-01-31 16:52:26,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579419958] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:26,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110853237] [2024-01-31 16:52:26,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:52:26,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:26,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:26,181 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) [2024-01-31 16:52:26,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-31 16:52:26,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-31 16:52:26,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:26,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:52:26,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:52:26,572 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:52:26,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110853237] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:52:26,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:52:26,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 16 [2024-01-31 16:52:26,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631397568] [2024-01-31 16:52:26,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:26,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:52:26,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:26,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:52:26,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:52:26,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:26,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 463 flow. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:26,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:26,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:26,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:26,901 INFO L124 PetriNetUnfolderBase]: 849/1455 cut-off events. [2024-01-31 16:52:26,901 INFO L125 PetriNetUnfolderBase]: For 2685/2685 co-relation queries the response was YES. [2024-01-31 16:52:26,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4916 conditions, 1455 events. 849/1455 cut-off events. For 2685/2685 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6914 event pairs, 169 based on Foata normal form. 1/1454 useless extension candidates. Maximal degree in co-relation 4871. Up to 906 conditions per place. [2024-01-31 16:52:26,910 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 96 selfloop transitions, 28 changer transitions 8/133 dead transitions. [2024-01-31 16:52:26,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 133 transitions, 992 flow [2024-01-31 16:52:26,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:52:26,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:52:26,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-01-31 16:52:26,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4158730158730159 [2024-01-31 16:52:26,912 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 463 flow. Second operand 9 states and 131 transitions. [2024-01-31 16:52:26,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 133 transitions, 992 flow [2024-01-31 16:52:26,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 133 transitions, 958 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-01-31 16:52:26,925 INFO L231 Difference]: Finished difference. Result has 74 places, 73 transitions, 551 flow [2024-01-31 16:52:26,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=551, PETRI_PLACES=74, PETRI_TRANSITIONS=73} [2024-01-31 16:52:26,928 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 43 predicate places. [2024-01-31 16:52:26,928 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 73 transitions, 551 flow [2024-01-31 16:52:26,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:26,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:26,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:26,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:27,140 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,SelfDestructingSolverStorable7 [2024-01-31 16:52:27,141 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:27,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:27,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1433190095, now seen corresponding path program 1 times [2024-01-31 16:52:27,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:27,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548713024] [2024-01-31 16:52:27,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:27,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:27,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:27,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:27,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548713024] [2024-01-31 16:52:27,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548713024] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:27,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369538534] [2024-01-31 16:52:27,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:27,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:27,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:27,392 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) [2024-01-31 16:52:27,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-31 16:52:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:27,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 20 conjunts are in the unsatisfiable core [2024-01-31 16:52:27,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:27,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:27,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:28,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369538534] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:28,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:52:28,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 23 [2024-01-31 16:52:28,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748391925] [2024-01-31 16:52:28,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:28,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:52:28,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:28,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:52:28,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:52:28,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:28,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 551 flow. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:28,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:28,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:28,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:28,905 INFO L124 PetriNetUnfolderBase]: 930/1632 cut-off events. [2024-01-31 16:52:28,905 INFO L125 PetriNetUnfolderBase]: For 3538/3538 co-relation queries the response was YES. [2024-01-31 16:52:28,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5645 conditions, 1632 events. 930/1632 cut-off events. For 3538/3538 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8353 event pairs, 211 based on Foata normal form. 1/1631 useless extension candidates. Maximal degree in co-relation 5590. Up to 838 conditions per place. [2024-01-31 16:52:28,914 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 118 selfloop transitions, 29 changer transitions 10/158 dead transitions. [2024-01-31 16:52:28,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 158 transitions, 1226 flow [2024-01-31 16:52:28,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 16:52:28,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 16:52:28,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 165 transitions. [2024-01-31 16:52:28,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3626373626373626 [2024-01-31 16:52:28,915 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 551 flow. Second operand 13 states and 165 transitions. [2024-01-31 16:52:28,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 158 transitions, 1226 flow [2024-01-31 16:52:28,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 158 transitions, 1169 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-01-31 16:52:28,930 INFO L231 Difference]: Finished difference. Result has 88 places, 80 transitions, 655 flow [2024-01-31 16:52:28,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=655, PETRI_PLACES=88, PETRI_TRANSITIONS=80} [2024-01-31 16:52:28,931 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 57 predicate places. [2024-01-31 16:52:28,931 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 80 transitions, 655 flow [2024-01-31 16:52:28,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:28,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:28,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:28,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:29,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:29,143 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:29,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:29,144 INFO L85 PathProgramCache]: Analyzing trace with hash 755538932, now seen corresponding path program 3 times [2024-01-31 16:52:29,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:29,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451050648] [2024-01-31 16:52:29,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:29,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:29,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:29,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:29,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:29,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451050648] [2024-01-31 16:52:29,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451050648] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:29,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661942700] [2024-01-31 16:52:29,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:52:29,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:29,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:29,327 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) [2024-01-31 16:52:29,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-31 16:52:29,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-01-31 16:52:29,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:29,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:52:29,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:29,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:52:29,608 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:52:29,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661942700] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:52:29,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:52:29,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 16 [2024-01-31 16:52:29,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973661299] [2024-01-31 16:52:29,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:29,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:52:29,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:29,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:52:29,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:52:29,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:29,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 80 transitions, 655 flow. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:29,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:29,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:29,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:29,877 INFO L124 PetriNetUnfolderBase]: 900/1569 cut-off events. [2024-01-31 16:52:29,877 INFO L125 PetriNetUnfolderBase]: For 4323/4323 co-relation queries the response was YES. [2024-01-31 16:52:29,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5614 conditions, 1569 events. 900/1569 cut-off events. For 4323/4323 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7855 event pairs, 204 based on Foata normal form. 1/1568 useless extension candidates. Maximal degree in co-relation 5557. Up to 1004 conditions per place. [2024-01-31 16:52:29,886 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 100 selfloop transitions, 30 changer transitions 8/139 dead transitions. [2024-01-31 16:52:29,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 139 transitions, 1154 flow [2024-01-31 16:52:29,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:52:29,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:52:29,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-01-31 16:52:29,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4158730158730159 [2024-01-31 16:52:29,887 INFO L175 Difference]: Start difference. First operand has 88 places, 80 transitions, 655 flow. Second operand 9 states and 131 transitions. [2024-01-31 16:52:29,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 139 transitions, 1154 flow [2024-01-31 16:52:29,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 139 transitions, 1083 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-01-31 16:52:29,899 INFO L231 Difference]: Finished difference. Result has 90 places, 79 transitions, 636 flow [2024-01-31 16:52:29,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=636, PETRI_PLACES=90, PETRI_TRANSITIONS=79} [2024-01-31 16:52:29,901 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 59 predicate places. [2024-01-31 16:52:29,901 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 79 transitions, 636 flow [2024-01-31 16:52:29,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:29,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:29,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:29,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-01-31 16:52:30,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:30,113 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:30,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:30,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1781017511, now seen corresponding path program 2 times [2024-01-31 16:52:30,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:30,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419877760] [2024-01-31 16:52:30,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:30,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:30,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:30,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419877760] [2024-01-31 16:52:30,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419877760] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:30,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916983630] [2024-01-31 16:52:30,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:52:30,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:30,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:30,394 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) [2024-01-31 16:52:30,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-31 16:52:30,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-31 16:52:30,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:30,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:52:30,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:52:30,653 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:52:30,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916983630] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:52:30,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:52:30,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2024-01-31 16:52:30,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506004973] [2024-01-31 16:52:30,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:30,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:52:30,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:30,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:52:30,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:52:30,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:30,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 79 transitions, 636 flow. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:30,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:30,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:30,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:30,901 INFO L124 PetriNetUnfolderBase]: 896/1565 cut-off events. [2024-01-31 16:52:30,902 INFO L125 PetriNetUnfolderBase]: For 4141/4141 co-relation queries the response was YES. [2024-01-31 16:52:30,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5559 conditions, 1565 events. 896/1565 cut-off events. For 4141/4141 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7816 event pairs, 237 based on Foata normal form. 1/1564 useless extension candidates. Maximal degree in co-relation 5503. Up to 1002 conditions per place. [2024-01-31 16:52:30,910 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 86 selfloop transitions, 27 changer transitions 13/127 dead transitions. [2024-01-31 16:52:30,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 127 transitions, 1111 flow [2024-01-31 16:52:30,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:52:30,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:52:30,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-01-31 16:52:30,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619047619047619 [2024-01-31 16:52:30,911 INFO L175 Difference]: Start difference. First operand has 90 places, 79 transitions, 636 flow. Second operand 9 states and 114 transitions. [2024-01-31 16:52:30,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 127 transitions, 1111 flow [2024-01-31 16:52:30,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 127 transitions, 1043 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-01-31 16:52:30,923 INFO L231 Difference]: Finished difference. Result has 94 places, 81 transitions, 678 flow [2024-01-31 16:52:30,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=678, PETRI_PLACES=94, PETRI_TRANSITIONS=81} [2024-01-31 16:52:30,924 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 63 predicate places. [2024-01-31 16:52:30,924 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 81 transitions, 678 flow [2024-01-31 16:52:30,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:30,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:30,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:30,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:31,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-01-31 16:52:31,136 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:31,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:31,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1827868238, now seen corresponding path program 4 times [2024-01-31 16:52:31,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:31,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13876713] [2024-01-31 16:52:31,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:31,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:31,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:31,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:31,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13876713] [2024-01-31 16:52:31,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13876713] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:31,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927491432] [2024-01-31 16:52:31,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:52:31,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:31,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:31,318 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) [2024-01-31 16:52:31,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-31 16:52:31,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:52:31,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:31,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 20 conjunts are in the unsatisfiable core [2024-01-31 16:52:31,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:31,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:31,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:31,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927491432] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:31,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:52:31,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2024-01-31 16:52:31,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436031791] [2024-01-31 16:52:31,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:31,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:52:31,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:31,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:52:31,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2024-01-31 16:52:31,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:31,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 81 transitions, 678 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:31,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:31,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:31,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:32,533 INFO L124 PetriNetUnfolderBase]: 866/1502 cut-off events. [2024-01-31 16:52:32,533 INFO L125 PetriNetUnfolderBase]: For 3981/3981 co-relation queries the response was YES. [2024-01-31 16:52:32,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5514 conditions, 1502 events. 866/1502 cut-off events. For 3981/3981 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7392 event pairs, 194 based on Foata normal form. 1/1501 useless extension candidates. Maximal degree in co-relation 5405. Up to 435 conditions per place. [2024-01-31 16:52:32,548 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 127 selfloop transitions, 34 changer transitions 9/171 dead transitions. [2024-01-31 16:52:32,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 171 transitions, 1396 flow [2024-01-31 16:52:32,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:52:32,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:52:32,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 172 transitions. [2024-01-31 16:52:32,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-01-31 16:52:32,550 INFO L175 Difference]: Start difference. First operand has 94 places, 81 transitions, 678 flow. Second operand 12 states and 172 transitions. [2024-01-31 16:52:32,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 171 transitions, 1396 flow [2024-01-31 16:52:32,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 171 transitions, 1318 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-01-31 16:52:32,563 INFO L231 Difference]: Finished difference. Result has 101 places, 82 transitions, 698 flow [2024-01-31 16:52:32,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=698, PETRI_PLACES=101, PETRI_TRANSITIONS=82} [2024-01-31 16:52:32,564 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 70 predicate places. [2024-01-31 16:52:32,564 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 82 transitions, 698 flow [2024-01-31 16:52:32,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:32,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:32,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:32,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:32,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:32,776 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:32,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:32,776 INFO L85 PathProgramCache]: Analyzing trace with hash 353362970, now seen corresponding path program 5 times [2024-01-31 16:52:32,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:32,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433804799] [2024-01-31 16:52:32,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:32,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:32,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:32,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:32,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433804799] [2024-01-31 16:52:32,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433804799] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:32,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716165504] [2024-01-31 16:52:32,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:52:32,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:32,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:32,941 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) [2024-01-31 16:52:32,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-31 16:52:33,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:52:33,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:33,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 20 conjunts are in the unsatisfiable core [2024-01-31 16:52:33,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:33,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:33,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:33,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716165504] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:33,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:52:33,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2024-01-31 16:52:33,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898677090] [2024-01-31 16:52:33,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:33,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:52:33,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:33,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:52:33,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2024-01-31 16:52:33,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:33,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 82 transitions, 698 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:33,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:33,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:33,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:34,345 INFO L124 PetriNetUnfolderBase]: 937/1651 cut-off events. [2024-01-31 16:52:34,345 INFO L125 PetriNetUnfolderBase]: For 4998/4998 co-relation queries the response was YES. [2024-01-31 16:52:34,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5982 conditions, 1651 events. 937/1651 cut-off events. For 4998/4998 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8395 event pairs, 188 based on Foata normal form. 1/1650 useless extension candidates. Maximal degree in co-relation 5918. Up to 435 conditions per place. [2024-01-31 16:52:34,352 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 144 selfloop transitions, 38 changer transitions 10/193 dead transitions. [2024-01-31 16:52:34,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 193 transitions, 1564 flow [2024-01-31 16:52:34,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 16:52:34,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 16:52:34,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 197 transitions. [2024-01-31 16:52:34,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432967032967033 [2024-01-31 16:52:34,353 INFO L175 Difference]: Start difference. First operand has 101 places, 82 transitions, 698 flow. Second operand 13 states and 197 transitions. [2024-01-31 16:52:34,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 193 transitions, 1564 flow [2024-01-31 16:52:34,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 193 transitions, 1505 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-01-31 16:52:34,367 INFO L231 Difference]: Finished difference. Result has 108 places, 87 transitions, 810 flow [2024-01-31 16:52:34,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=810, PETRI_PLACES=108, PETRI_TRANSITIONS=87} [2024-01-31 16:52:34,367 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 77 predicate places. [2024-01-31 16:52:34,367 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 87 transitions, 810 flow [2024-01-31 16:52:34,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:34,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:34,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:34,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:34,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:34,579 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:34,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:34,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1192318220, now seen corresponding path program 6 times [2024-01-31 16:52:34,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:34,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894181364] [2024-01-31 16:52:34,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:34,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:34,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:34,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894181364] [2024-01-31 16:52:34,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894181364] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:34,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945226157] [2024-01-31 16:52:34,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:52:34,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:34,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:34,783 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:52:34,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-31 16:52:34,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-01-31 16:52:34,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:34,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:52:34,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:35,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:52:35,083 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:52:35,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945226157] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:52:35,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:52:35,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 16 [2024-01-31 16:52:35,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930040767] [2024-01-31 16:52:35,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:35,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:52:35,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:35,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:52:35,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:52:35,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:35,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 87 transitions, 810 flow. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:35,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:35,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:35,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:35,338 INFO L124 PetriNetUnfolderBase]: 927/1626 cut-off events. [2024-01-31 16:52:35,338 INFO L125 PetriNetUnfolderBase]: For 5837/5837 co-relation queries the response was YES. [2024-01-31 16:52:35,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6141 conditions, 1626 events. 927/1626 cut-off events. For 5837/5837 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8265 event pairs, 230 based on Foata normal form. 1/1625 useless extension candidates. Maximal degree in co-relation 6078. Up to 979 conditions per place. [2024-01-31 16:52:35,348 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 98 selfloop transitions, 32 changer transitions 9/140 dead transitions. [2024-01-31 16:52:35,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 140 transitions, 1299 flow [2024-01-31 16:52:35,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:52:35,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:52:35,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 124 transitions. [2024-01-31 16:52:35,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39365079365079364 [2024-01-31 16:52:35,353 INFO L175 Difference]: Start difference. First operand has 108 places, 87 transitions, 810 flow. Second operand 9 states and 124 transitions. [2024-01-31 16:52:35,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 140 transitions, 1299 flow [2024-01-31 16:52:35,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 140 transitions, 1249 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-01-31 16:52:35,396 INFO L231 Difference]: Finished difference. Result has 110 places, 87 transitions, 830 flow [2024-01-31 16:52:35,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=830, PETRI_PLACES=110, PETRI_TRANSITIONS=87} [2024-01-31 16:52:35,397 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 79 predicate places. [2024-01-31 16:52:35,397 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 87 transitions, 830 flow [2024-01-31 16:52:35,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:35,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:35,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:35,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:35,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-31 16:52:35,609 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:35,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:35,610 INFO L85 PathProgramCache]: Analyzing trace with hash -14411879, now seen corresponding path program 3 times [2024-01-31 16:52:35,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:35,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237020045] [2024-01-31 16:52:35,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:35,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:35,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:35,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237020045] [2024-01-31 16:52:35,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237020045] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:35,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279536050] [2024-01-31 16:52:35,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:52:35,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:35,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:35,809 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:52:35,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-31 16:52:35,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-01-31 16:52:35,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:35,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:52:35,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:52:36,086 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:52:36,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279536050] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:52:36,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:52:36,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2024-01-31 16:52:36,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470052545] [2024-01-31 16:52:36,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:36,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:52:36,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:36,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:52:36,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:52:36,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:36,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 87 transitions, 830 flow. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:36,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:36,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:36,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:36,353 INFO L124 PetriNetUnfolderBase]: 917/1601 cut-off events. [2024-01-31 16:52:36,353 INFO L125 PetriNetUnfolderBase]: For 5622/5622 co-relation queries the response was YES. [2024-01-31 16:52:36,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6180 conditions, 1601 events. 917/1601 cut-off events. For 5622/5622 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8098 event pairs, 249 based on Foata normal form. 1/1600 useless extension candidates. Maximal degree in co-relation 6120. Up to 1051 conditions per place. [2024-01-31 16:52:36,363 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 86 selfloop transitions, 25 changer transitions 19/131 dead transitions. [2024-01-31 16:52:36,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 131 transitions, 1273 flow [2024-01-31 16:52:36,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:52:36,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:52:36,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-01-31 16:52:36,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619047619047619 [2024-01-31 16:52:36,365 INFO L175 Difference]: Start difference. First operand has 110 places, 87 transitions, 830 flow. Second operand 9 states and 114 transitions. [2024-01-31 16:52:36,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 131 transitions, 1273 flow [2024-01-31 16:52:36,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 131 transitions, 1211 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-01-31 16:52:36,382 INFO L231 Difference]: Finished difference. Result has 111 places, 84 transitions, 800 flow [2024-01-31 16:52:36,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=800, PETRI_PLACES=111, PETRI_TRANSITIONS=84} [2024-01-31 16:52:36,384 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 80 predicate places. [2024-01-31 16:52:36,384 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 84 transitions, 800 flow [2024-01-31 16:52:36,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:36,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:36,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:36,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:36,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-31 16:52:36,596 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:36,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:36,597 INFO L85 PathProgramCache]: Analyzing trace with hash 842736753, now seen corresponding path program 4 times [2024-01-31 16:52:36,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:36,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877686183] [2024-01-31 16:52:36,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:36,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:36,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:36,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:36,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877686183] [2024-01-31 16:52:36,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877686183] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:36,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020790317] [2024-01-31 16:52:36,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:52:36,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:36,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:36,766 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:52:36,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-31 16:52:36,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:52:36,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:36,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-31 16:52:36,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:37,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:37,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:37,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:37,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020790317] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:37,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:52:37,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 10] total 26 [2024-01-31 16:52:37,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343190054] [2024-01-31 16:52:37,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:37,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:52:37,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:37,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:52:37,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2024-01-31 16:52:37,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:37,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 84 transitions, 800 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:37,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:37,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:37,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:38,001 INFO L124 PetriNetUnfolderBase]: 1095/1911 cut-off events. [2024-01-31 16:52:38,001 INFO L125 PetriNetUnfolderBase]: For 6846/6846 co-relation queries the response was YES. [2024-01-31 16:52:38,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7432 conditions, 1911 events. 1095/1911 cut-off events. For 6846/6846 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10021 event pairs, 195 based on Foata normal form. 2/1911 useless extension candidates. Maximal degree in co-relation 7204. Up to 666 conditions per place. [2024-01-31 16:52:38,010 INFO L140 encePairwiseOnDemand]: 20/35 looper letters, 159 selfloop transitions, 54 changer transitions 13/227 dead transitions. [2024-01-31 16:52:38,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 227 transitions, 2022 flow [2024-01-31 16:52:38,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 16:52:38,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 16:52:38,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 226 transitions. [2024-01-31 16:52:38,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43047619047619046 [2024-01-31 16:52:38,013 INFO L175 Difference]: Start difference. First operand has 111 places, 84 transitions, 800 flow. Second operand 15 states and 226 transitions. [2024-01-31 16:52:38,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 227 transitions, 2022 flow [2024-01-31 16:52:38,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 227 transitions, 1919 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-01-31 16:52:38,034 INFO L231 Difference]: Finished difference. Result has 121 places, 103 transitions, 1078 flow [2024-01-31 16:52:38,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1078, PETRI_PLACES=121, PETRI_TRANSITIONS=103} [2024-01-31 16:52:38,035 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 90 predicate places. [2024-01-31 16:52:38,035 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 103 transitions, 1078 flow [2024-01-31 16:52:38,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:38,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:38,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:38,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:38,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-31 16:52:38,242 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:38,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:38,243 INFO L85 PathProgramCache]: Analyzing trace with hash -900001537, now seen corresponding path program 5 times [2024-01-31 16:52:38,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:38,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254894265] [2024-01-31 16:52:38,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:38,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:38,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:38,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254894265] [2024-01-31 16:52:38,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254894265] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:38,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453195832] [2024-01-31 16:52:38,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:52:38,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:38,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:38,400 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:52:38,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-31 16:52:38,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:52:38,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:38,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 20 conjunts are in the unsatisfiable core [2024-01-31 16:52:38,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:38,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:38,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:39,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:39,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453195832] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:39,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:52:39,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 22 [2024-01-31 16:52:39,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661535507] [2024-01-31 16:52:39,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:39,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:52:39,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:39,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:52:39,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:52:39,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:39,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 103 transitions, 1078 flow. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:39,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:39,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:39,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:39,692 INFO L124 PetriNetUnfolderBase]: 1056/1831 cut-off events. [2024-01-31 16:52:39,692 INFO L125 PetriNetUnfolderBase]: For 9130/9130 co-relation queries the response was YES. [2024-01-31 16:52:39,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7849 conditions, 1831 events. 1056/1831 cut-off events. For 9130/9130 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9375 event pairs, 280 based on Foata normal form. 1/1830 useless extension candidates. Maximal degree in co-relation 7779. Up to 1228 conditions per place. [2024-01-31 16:52:39,704 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 95 selfloop transitions, 30 changer transitions 22/148 dead transitions. [2024-01-31 16:52:39,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 148 transitions, 1557 flow [2024-01-31 16:52:39,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:52:39,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:52:39,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 128 transitions. [2024-01-31 16:52:39,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3047619047619048 [2024-01-31 16:52:39,706 INFO L175 Difference]: Start difference. First operand has 121 places, 103 transitions, 1078 flow. Second operand 12 states and 128 transitions. [2024-01-31 16:52:39,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 148 transitions, 1557 flow [2024-01-31 16:52:39,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 148 transitions, 1401 flow, removed 29 selfloop flow, removed 12 redundant places. [2024-01-31 16:52:39,737 INFO L231 Difference]: Finished difference. Result has 120 places, 96 transitions, 904 flow [2024-01-31 16:52:39,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=904, PETRI_PLACES=120, PETRI_TRANSITIONS=96} [2024-01-31 16:52:39,738 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 89 predicate places. [2024-01-31 16:52:39,738 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 96 transitions, 904 flow [2024-01-31 16:52:39,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:39,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:39,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:39,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:39,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-31 16:52:39,952 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:39,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:39,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1962269031, now seen corresponding path program 6 times [2024-01-31 16:52:39,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:39,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459293906] [2024-01-31 16:52:39,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:39,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:39,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:40,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:40,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:40,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459293906] [2024-01-31 16:52:40,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459293906] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:40,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135860127] [2024-01-31 16:52:40,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:52:40,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:40,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:40,113 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:52:40,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-31 16:52:40,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-01-31 16:52:40,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:40,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:52:40,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:52:40,360 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:52:40,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135860127] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:52:40,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:52:40,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2024-01-31 16:52:40,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547039340] [2024-01-31 16:52:40,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:40,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:52:40,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:40,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:52:40,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:52:40,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:40,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 96 transitions, 904 flow. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:40,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:40,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:40,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:40,602 INFO L124 PetriNetUnfolderBase]: 1011/1741 cut-off events. [2024-01-31 16:52:40,602 INFO L125 PetriNetUnfolderBase]: For 7417/7417 co-relation queries the response was YES. [2024-01-31 16:52:40,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7234 conditions, 1741 events. 1011/1741 cut-off events. For 7417/7417 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8770 event pairs, 280 based on Foata normal form. 1/1740 useless extension candidates. Maximal degree in co-relation 7171. Up to 1228 conditions per place. [2024-01-31 16:52:40,611 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 74 selfloop transitions, 25 changer transitions 26/126 dead transitions. [2024-01-31 16:52:40,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 126 transitions, 1267 flow [2024-01-31 16:52:40,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:52:40,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:52:40,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-01-31 16:52:40,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32063492063492066 [2024-01-31 16:52:40,613 INFO L175 Difference]: Start difference. First operand has 120 places, 96 transitions, 904 flow. Second operand 9 states and 101 transitions. [2024-01-31 16:52:40,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 126 transitions, 1267 flow [2024-01-31 16:52:40,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 126 transitions, 1194 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-01-31 16:52:40,632 INFO L231 Difference]: Finished difference. Result has 115 places, 88 transitions, 827 flow [2024-01-31 16:52:40,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=827, PETRI_PLACES=115, PETRI_TRANSITIONS=88} [2024-01-31 16:52:40,633 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 84 predicate places. [2024-01-31 16:52:40,633 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 88 transitions, 827 flow [2024-01-31 16:52:40,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:40,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:40,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:40,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:40,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-31 16:52:40,845 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:40,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:40,845 INFO L85 PathProgramCache]: Analyzing trace with hash -626985642, now seen corresponding path program 1 times [2024-01-31 16:52:40,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:40,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610935568] [2024-01-31 16:52:40,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:40,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:40,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:40,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:40,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610935568] [2024-01-31 16:52:40,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610935568] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:40,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894468096] [2024-01-31 16:52:40,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:40,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:40,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:40,985 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:52:40,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-31 16:52:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:41,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 16:52:41,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:41,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:41,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:41,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:41,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894468096] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:41,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:52:41,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-01-31 16:52:41,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885143433] [2024-01-31 16:52:41,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:41,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:52:41,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:41,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:52:41,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-01-31 16:52:41,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:41,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 88 transitions, 827 flow. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:41,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:41,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:41,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:41,447 INFO L124 PetriNetUnfolderBase]: 1058/1806 cut-off events. [2024-01-31 16:52:41,448 INFO L125 PetriNetUnfolderBase]: For 7518/7518 co-relation queries the response was YES. [2024-01-31 16:52:41,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7665 conditions, 1806 events. 1058/1806 cut-off events. For 7518/7518 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9045 event pairs, 522 based on Foata normal form. 40/1845 useless extension candidates. Maximal degree in co-relation 7612. Up to 710 conditions per place. [2024-01-31 16:52:41,456 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 135 selfloop transitions, 13 changer transitions 0/149 dead transitions. [2024-01-31 16:52:41,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 149 transitions, 1578 flow [2024-01-31 16:52:41,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:52:41,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:52:41,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-01-31 16:52:41,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-01-31 16:52:41,457 INFO L175 Difference]: Start difference. First operand has 115 places, 88 transitions, 827 flow. Second operand 8 states and 106 transitions. [2024-01-31 16:52:41,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 149 transitions, 1578 flow [2024-01-31 16:52:41,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 149 transitions, 1366 flow, removed 43 selfloop flow, removed 13 redundant places. [2024-01-31 16:52:41,476 INFO L231 Difference]: Finished difference. Result has 98 places, 95 transitions, 784 flow [2024-01-31 16:52:41,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=784, PETRI_PLACES=98, PETRI_TRANSITIONS=95} [2024-01-31 16:52:41,476 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 67 predicate places. [2024-01-31 16:52:41,476 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 95 transitions, 784 flow [2024-01-31 16:52:41,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:41,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:41,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:41,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:41,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:41,688 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:41,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:41,688 INFO L85 PathProgramCache]: Analyzing trace with hash 7267333, now seen corresponding path program 1 times [2024-01-31 16:52:41,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:41,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27978203] [2024-01-31 16:52:41,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:41,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:52:41,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:41,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27978203] [2024-01-31 16:52:41,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27978203] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:52:41,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:52:41,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:52:41,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815366140] [2024-01-31 16:52:41,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:41,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:52:41,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:41,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:52:41,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:52:41,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:41,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 95 transitions, 784 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:41,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:41,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:41,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:41,890 INFO L124 PetriNetUnfolderBase]: 832/1450 cut-off events. [2024-01-31 16:52:41,890 INFO L125 PetriNetUnfolderBase]: For 5172/5172 co-relation queries the response was YES. [2024-01-31 16:52:41,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6027 conditions, 1450 events. 832/1450 cut-off events. For 5172/5172 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6909 event pairs, 524 based on Foata normal form. 38/1487 useless extension candidates. Maximal degree in co-relation 5980. Up to 908 conditions per place. [2024-01-31 16:52:41,897 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 93 selfloop transitions, 9 changer transitions 8/111 dead transitions. [2024-01-31 16:52:41,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 111 transitions, 1050 flow [2024-01-31 16:52:41,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:52:41,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:52:41,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2024-01-31 16:52:41,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4514285714285714 [2024-01-31 16:52:41,898 INFO L175 Difference]: Start difference. First operand has 98 places, 95 transitions, 784 flow. Second operand 5 states and 79 transitions. [2024-01-31 16:52:41,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 111 transitions, 1050 flow [2024-01-31 16:52:41,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 111 transitions, 1038 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-01-31 16:52:41,913 INFO L231 Difference]: Finished difference. Result has 100 places, 81 transitions, 649 flow [2024-01-31 16:52:41,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=649, PETRI_PLACES=100, PETRI_TRANSITIONS=81} [2024-01-31 16:52:41,914 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 69 predicate places. [2024-01-31 16:52:41,914 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 81 transitions, 649 flow [2024-01-31 16:52:41,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:41,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:41,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:41,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-01-31 16:52:41,914 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:41,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:41,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1438137167, now seen corresponding path program 1 times [2024-01-31 16:52:41,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:41,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959015213] [2024-01-31 16:52:41,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:41,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:41,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:41,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:52:41,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:41,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959015213] [2024-01-31 16:52:41,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959015213] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:52:41,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:52:41,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:52:41,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696857211] [2024-01-31 16:52:41,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:41,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:52:41,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:41,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:52:41,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:52:41,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:41,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 81 transitions, 649 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:41,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:41,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:41,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:42,089 INFO L124 PetriNetUnfolderBase]: 647/1148 cut-off events. [2024-01-31 16:52:42,089 INFO L125 PetriNetUnfolderBase]: For 3976/3976 co-relation queries the response was YES. [2024-01-31 16:52:42,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4766 conditions, 1148 events. 647/1148 cut-off events. For 3976/3976 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 5271 event pairs, 417 based on Foata normal form. 32/1179 useless extension candidates. Maximal degree in co-relation 4733. Up to 908 conditions per place. [2024-01-31 16:52:42,095 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 54 selfloop transitions, 2 changer transitions 30/87 dead transitions. [2024-01-31 16:52:42,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 87 transitions, 783 flow [2024-01-31 16:52:42,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:52:42,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:52:42,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 69 transitions. [2024-01-31 16:52:42,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942857142857143 [2024-01-31 16:52:42,096 INFO L175 Difference]: Start difference. First operand has 100 places, 81 transitions, 649 flow. Second operand 5 states and 69 transitions. [2024-01-31 16:52:42,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 87 transitions, 783 flow [2024-01-31 16:52:42,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 87 transitions, 745 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-01-31 16:52:42,105 INFO L231 Difference]: Finished difference. Result has 89 places, 57 transitions, 381 flow [2024-01-31 16:52:42,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=381, PETRI_PLACES=89, PETRI_TRANSITIONS=57} [2024-01-31 16:52:42,106 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 58 predicate places. [2024-01-31 16:52:42,106 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 57 transitions, 381 flow [2024-01-31 16:52:42,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:42,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:42,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:42,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-01-31 16:52:42,106 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:42,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:42,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1167778243, now seen corresponding path program 1 times [2024-01-31 16:52:42,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:42,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653584415] [2024-01-31 16:52:42,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:42,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:42,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:42,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653584415] [2024-01-31 16:52:42,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653584415] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:42,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082059378] [2024-01-31 16:52:42,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:42,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:42,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:42,201 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:52:42,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-31 16:52:42,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:42,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 16:52:42,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:42,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:42,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082059378] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:42,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:52:42,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-01-31 16:52:42,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19216106] [2024-01-31 16:52:42,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:42,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:52:42,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:42,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:52:42,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-01-31 16:52:42,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:42,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 57 transitions, 381 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:42,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:42,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:42,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:42,526 INFO L124 PetriNetUnfolderBase]: 384/651 cut-off events. [2024-01-31 16:52:42,526 INFO L125 PetriNetUnfolderBase]: For 2073/2073 co-relation queries the response was YES. [2024-01-31 16:52:42,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2752 conditions, 651 events. 384/651 cut-off events. For 2073/2073 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2379 event pairs, 199 based on Foata normal form. 20/670 useless extension candidates. Maximal degree in co-relation 2723. Up to 472 conditions per place. [2024-01-31 16:52:42,529 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 50 selfloop transitions, 12 changer transitions 0/63 dead transitions. [2024-01-31 16:52:42,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 63 transitions, 544 flow [2024-01-31 16:52:42,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:52:42,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:52:42,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 66 transitions. [2024-01-31 16:52:42,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2693877551020408 [2024-01-31 16:52:42,530 INFO L175 Difference]: Start difference. First operand has 89 places, 57 transitions, 381 flow. Second operand 7 states and 66 transitions. [2024-01-31 16:52:42,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 63 transitions, 544 flow [2024-01-31 16:52:42,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 63 transitions, 480 flow, removed 25 selfloop flow, removed 12 redundant places. [2024-01-31 16:52:42,535 INFO L231 Difference]: Finished difference. Result has 65 places, 50 transitions, 325 flow [2024-01-31 16:52:42,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=325, PETRI_PLACES=65, PETRI_TRANSITIONS=50} [2024-01-31 16:52:42,535 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 34 predicate places. [2024-01-31 16:52:42,535 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 50 transitions, 325 flow [2024-01-31 16:52:42,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:42,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:42,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:42,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:42,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:42,747 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:42,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:42,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1127382352, now seen corresponding path program 1 times [2024-01-31 16:52:42,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:42,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176313283] [2024-01-31 16:52:42,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:42,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:42,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:43,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:43,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176313283] [2024-01-31 16:52:43,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176313283] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:43,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049803696] [2024-01-31 16:52:43,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:43,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:43,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:43,604 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:52:43,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-31 16:52:43,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:43,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-31 16:52:43,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:44,086 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-31 16:52:44,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-01-31 16:52:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:44,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:44,583 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:52:44,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 82 [2024-01-31 16:52:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:52:44,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049803696] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:44,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:52:44,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 13] total 33 [2024-01-31 16:52:44,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798213097] [2024-01-31 16:52:44,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:44,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:52:44,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:44,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:52:44,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2024-01-31 16:52:44,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:44,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 50 transitions, 325 flow. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:44,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:44,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:44,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:45,698 INFO L124 PetriNetUnfolderBase]: 611/1046 cut-off events. [2024-01-31 16:52:45,698 INFO L125 PetriNetUnfolderBase]: For 1959/1959 co-relation queries the response was YES. [2024-01-31 16:52:45,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4042 conditions, 1046 events. 611/1046 cut-off events. For 1959/1959 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4622 event pairs, 103 based on Foata normal form. 1/1046 useless extension candidates. Maximal degree in co-relation 4022. Up to 421 conditions per place. [2024-01-31 16:52:45,703 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 106 selfloop transitions, 31 changer transitions 12/150 dead transitions. [2024-01-31 16:52:45,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 150 transitions, 1090 flow [2024-01-31 16:52:45,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:52:45,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:52:45,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 176 transitions. [2024-01-31 16:52:45,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35918367346938773 [2024-01-31 16:52:45,705 INFO L175 Difference]: Start difference. First operand has 65 places, 50 transitions, 325 flow. Second operand 14 states and 176 transitions. [2024-01-31 16:52:45,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 150 transitions, 1090 flow [2024-01-31 16:52:45,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 150 transitions, 1070 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-01-31 16:52:45,710 INFO L231 Difference]: Finished difference. Result has 83 places, 68 transitions, 583 flow [2024-01-31 16:52:45,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=583, PETRI_PLACES=83, PETRI_TRANSITIONS=68} [2024-01-31 16:52:45,710 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 52 predicate places. [2024-01-31 16:52:45,710 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 68 transitions, 583 flow [2024-01-31 16:52:45,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:45,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:45,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:45,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:45,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:45,922 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:45,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:45,922 INFO L85 PathProgramCache]: Analyzing trace with hash 2026843892, now seen corresponding path program 2 times [2024-01-31 16:52:45,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:45,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199279354] [2024-01-31 16:52:45,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:45,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:45,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:46,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:46,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199279354] [2024-01-31 16:52:46,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199279354] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:46,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36903034] [2024-01-31 16:52:46,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:52:46,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:46,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:46,805 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:52:46,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-31 16:52:46,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-31 16:52:46,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:46,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:52:46,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:47,009 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-31 16:52:47,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-01-31 16:52:47,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:52:47,141 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:52:47,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36903034] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:52:47,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:52:47,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2024-01-31 16:52:47,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425356309] [2024-01-31 16:52:47,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:47,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:52:47,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:47,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:52:47,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:52:47,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:47,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 68 transitions, 583 flow. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:47,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:47,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:47,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:47,456 INFO L124 PetriNetUnfolderBase]: 668/1135 cut-off events. [2024-01-31 16:52:47,456 INFO L125 PetriNetUnfolderBase]: For 4829/4829 co-relation queries the response was YES. [2024-01-31 16:52:47,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5327 conditions, 1135 events. 668/1135 cut-off events. For 4829/4829 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5066 event pairs, 339 based on Foata normal form. 1/1135 useless extension candidates. Maximal degree in co-relation 5297. Up to 861 conditions per place. [2024-01-31 16:52:47,462 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 80 selfloop transitions, 26 changer transitions 15/122 dead transitions. [2024-01-31 16:52:47,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 122 transitions, 1253 flow [2024-01-31 16:52:47,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:52:47,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:52:47,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-01-31 16:52:47,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32 [2024-01-31 16:52:47,463 INFO L175 Difference]: Start difference. First operand has 83 places, 68 transitions, 583 flow. Second operand 10 states and 112 transitions. [2024-01-31 16:52:47,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 122 transitions, 1253 flow [2024-01-31 16:52:47,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 122 transitions, 1207 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-01-31 16:52:47,474 INFO L231 Difference]: Finished difference. Result has 94 places, 85 transitions, 869 flow [2024-01-31 16:52:47,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=869, PETRI_PLACES=94, PETRI_TRANSITIONS=85} [2024-01-31 16:52:47,475 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 63 predicate places. [2024-01-31 16:52:47,475 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 85 transitions, 869 flow [2024-01-31 16:52:47,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:47,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:47,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:47,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:47,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-01-31 16:52:47,684 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:47,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:47,685 INFO L85 PathProgramCache]: Analyzing trace with hash -583777256, now seen corresponding path program 3 times [2024-01-31 16:52:47,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:47,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306355940] [2024-01-31 16:52:47,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:47,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:48,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:48,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:48,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306355940] [2024-01-31 16:52:48,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306355940] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:48,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574891844] [2024-01-31 16:52:48,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:52:48,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:48,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:48,333 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:52:48,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-31 16:52:48,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-01-31 16:52:48,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:48,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:52:48,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:48,600 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-31 16:52:48,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-01-31 16:52:48,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:52:48,650 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:52:48,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574891844] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:52:48,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:52:48,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2024-01-31 16:52:48,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228078065] [2024-01-31 16:52:48,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:48,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:52:48,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:48,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:52:48,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:52:48,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:48,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 85 transitions, 869 flow. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:48,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:48,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:48,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:49,089 INFO L124 PetriNetUnfolderBase]: 651/1110 cut-off events. [2024-01-31 16:52:49,089 INFO L125 PetriNetUnfolderBase]: For 6069/6069 co-relation queries the response was YES. [2024-01-31 16:52:49,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5600 conditions, 1110 events. 651/1110 cut-off events. For 6069/6069 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5023 event pairs, 249 based on Foata normal form. 1/1110 useless extension candidates. Maximal degree in co-relation 5564. Up to 605 conditions per place. [2024-01-31 16:52:49,095 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 122 selfloop transitions, 24 changer transitions 20/167 dead transitions. [2024-01-31 16:52:49,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 167 transitions, 1785 flow [2024-01-31 16:52:49,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:52:49,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:52:49,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2024-01-31 16:52:49,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523809523809524 [2024-01-31 16:52:49,096 INFO L175 Difference]: Start difference. First operand has 94 places, 85 transitions, 869 flow. Second operand 12 states and 148 transitions. [2024-01-31 16:52:49,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 167 transitions, 1785 flow [2024-01-31 16:52:49,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 167 transitions, 1661 flow, removed 62 selfloop flow, removed 2 redundant places. [2024-01-31 16:52:49,109 INFO L231 Difference]: Finished difference. Result has 103 places, 82 transitions, 838 flow [2024-01-31 16:52:49,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=838, PETRI_PLACES=103, PETRI_TRANSITIONS=82} [2024-01-31 16:52:49,110 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 72 predicate places. [2024-01-31 16:52:49,110 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 82 transitions, 838 flow [2024-01-31 16:52:49,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:49,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:49,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:49,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:49,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:49,322 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:49,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:49,322 INFO L85 PathProgramCache]: Analyzing trace with hash 2082607604, now seen corresponding path program 4 times [2024-01-31 16:52:49,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:49,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454502592] [2024-01-31 16:52:49,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:49,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:49,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:49,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:49,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454502592] [2024-01-31 16:52:49,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454502592] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:49,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565623064] [2024-01-31 16:52:49,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:52:49,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:49,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:49,876 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:52:49,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-31 16:52:49,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:52:49,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:49,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjunts are in the unsatisfiable core [2024-01-31 16:52:49,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:50,136 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-31 16:52:50,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-01-31 16:52:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:52:50,225 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:52:50,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565623064] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:52:50,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:52:50,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 22 [2024-01-31 16:52:50,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201965291] [2024-01-31 16:52:50,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:50,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:52:50,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:50,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:52:50,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:52:50,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:50,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 82 transitions, 838 flow. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:50,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:50,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:50,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:50,691 INFO L124 PetriNetUnfolderBase]: 655/1126 cut-off events. [2024-01-31 16:52:50,691 INFO L125 PetriNetUnfolderBase]: For 6457/6457 co-relation queries the response was YES. [2024-01-31 16:52:50,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5766 conditions, 1126 events. 655/1126 cut-off events. For 6457/6457 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5098 event pairs, 327 based on Foata normal form. 1/1126 useless extension candidates. Maximal degree in co-relation 5728. Up to 822 conditions per place. [2024-01-31 16:52:50,696 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 79 selfloop transitions, 32 changer transitions 19/131 dead transitions. [2024-01-31 16:52:50,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 131 transitions, 1416 flow [2024-01-31 16:52:50,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:52:50,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:52:50,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 135 transitions. [2024-01-31 16:52:50,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2755102040816326 [2024-01-31 16:52:50,698 INFO L175 Difference]: Start difference. First operand has 103 places, 82 transitions, 838 flow. Second operand 14 states and 135 transitions. [2024-01-31 16:52:50,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 131 transitions, 1416 flow [2024-01-31 16:52:50,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 131 transitions, 1315 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-01-31 16:52:50,711 INFO L231 Difference]: Finished difference. Result has 110 places, 89 transitions, 960 flow [2024-01-31 16:52:50,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=960, PETRI_PLACES=110, PETRI_TRANSITIONS=89} [2024-01-31 16:52:50,711 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 79 predicate places. [2024-01-31 16:52:50,711 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 89 transitions, 960 flow [2024-01-31 16:52:50,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:50,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:50,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:50,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-01-31 16:52:50,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:50,923 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:50,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:50,923 INFO L85 PathProgramCache]: Analyzing trace with hash 2048258024, now seen corresponding path program 5 times [2024-01-31 16:52:50,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:50,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794975964] [2024-01-31 16:52:50,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:50,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:51,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:51,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794975964] [2024-01-31 16:52:51,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794975964] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:51,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645969412] [2024-01-31 16:52:51,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:52:51,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:51,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:51,513 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:52:51,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-31 16:52:51,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:52:51,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:51,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-31 16:52:51,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:51,951 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-31 16:52:51,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-01-31 16:52:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:52,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:52,363 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-31 16:52:52,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 71 [2024-01-31 16:52:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:52:52,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645969412] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:52,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:52:52,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 13] total 33 [2024-01-31 16:52:52,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788805168] [2024-01-31 16:52:52,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:52,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:52:52,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:52,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:52:52,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2024-01-31 16:52:52,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:52,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 89 transitions, 960 flow. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:52,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:52,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:52,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:53,063 INFO L124 PetriNetUnfolderBase]: 650/1121 cut-off events. [2024-01-31 16:52:53,063 INFO L125 PetriNetUnfolderBase]: For 6644/6644 co-relation queries the response was YES. [2024-01-31 16:52:53,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5711 conditions, 1121 events. 650/1121 cut-off events. For 6644/6644 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5058 event pairs, 119 based on Foata normal form. 1/1122 useless extension candidates. Maximal degree in co-relation 5670. Up to 681 conditions per place. [2024-01-31 16:52:53,069 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 93 selfloop transitions, 43 changer transitions 7/144 dead transitions. [2024-01-31 16:52:53,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 144 transitions, 1560 flow [2024-01-31 16:52:53,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:52:53,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:52:53,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 157 transitions. [2024-01-31 16:52:53,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32040816326530613 [2024-01-31 16:52:53,073 INFO L175 Difference]: Start difference. First operand has 110 places, 89 transitions, 960 flow. Second operand 14 states and 157 transitions. [2024-01-31 16:52:53,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 144 transitions, 1560 flow [2024-01-31 16:52:53,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 144 transitions, 1468 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-01-31 16:52:53,087 INFO L231 Difference]: Finished difference. Result has 114 places, 91 transitions, 1002 flow [2024-01-31 16:52:53,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1002, PETRI_PLACES=114, PETRI_TRANSITIONS=91} [2024-01-31 16:52:53,088 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 83 predicate places. [2024-01-31 16:52:53,088 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 91 transitions, 1002 flow [2024-01-31 16:52:53,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:53,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:53,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:53,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:53,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:53,299 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:53,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:53,300 INFO L85 PathProgramCache]: Analyzing trace with hash -899578516, now seen corresponding path program 6 times [2024-01-31 16:52:53,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:53,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111925896] [2024-01-31 16:52:53,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:53,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:53,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:53,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:53,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:53,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111925896] [2024-01-31 16:52:53,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111925896] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:53,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041558278] [2024-01-31 16:52:53,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:52:53,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:53,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:53,750 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:52:53,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-31 16:52:53,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-01-31 16:52:53,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:53,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:52:53,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:53,951 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-31 16:52:53,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-01-31 16:52:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:52:54,030 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:52:54,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041558278] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:52:54,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:52:54,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2024-01-31 16:52:54,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763479828] [2024-01-31 16:52:54,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:54,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:52:54,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:54,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:52:54,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:52:54,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:54,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 91 transitions, 1002 flow. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:54,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:54,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:54,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:54,289 INFO L124 PetriNetUnfolderBase]: 640/1107 cut-off events. [2024-01-31 16:52:54,290 INFO L125 PetriNetUnfolderBase]: For 5669/5669 co-relation queries the response was YES. [2024-01-31 16:52:54,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5553 conditions, 1107 events. 640/1107 cut-off events. For 5669/5669 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5007 event pairs, 347 based on Foata normal form. 1/1107 useless extension candidates. Maximal degree in co-relation 5513. Up to 857 conditions per place. [2024-01-31 16:52:54,295 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 81 selfloop transitions, 26 changer transitions 10/118 dead transitions. [2024-01-31 16:52:54,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 118 transitions, 1353 flow [2024-01-31 16:52:54,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:52:54,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:52:54,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-01-31 16:52:54,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.326984126984127 [2024-01-31 16:52:54,297 INFO L175 Difference]: Start difference. First operand has 114 places, 91 transitions, 1002 flow. Second operand 9 states and 103 transitions. [2024-01-31 16:52:54,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 118 transitions, 1353 flow [2024-01-31 16:52:54,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 118 transitions, 1259 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-01-31 16:52:54,309 INFO L231 Difference]: Finished difference. Result has 115 places, 88 transitions, 923 flow [2024-01-31 16:52:54,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=923, PETRI_PLACES=115, PETRI_TRANSITIONS=88} [2024-01-31 16:52:54,309 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 84 predicate places. [2024-01-31 16:52:54,310 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 88 transitions, 923 flow [2024-01-31 16:52:54,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:54,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:54,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:54,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-01-31 16:52:54,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-01-31 16:52:54,521 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:54,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:54,521 INFO L85 PathProgramCache]: Analyzing trace with hash -423887244, now seen corresponding path program 7 times [2024-01-31 16:52:54,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:54,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409340422] [2024-01-31 16:52:54,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:54,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:55,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:55,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:55,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409340422] [2024-01-31 16:52:55,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409340422] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:55,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260625710] [2024-01-31 16:52:55,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:52:55,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:55,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:55,139 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:52:55,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-31 16:52:55,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:55,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-31 16:52:55,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:55,468 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-31 16:52:55,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-01-31 16:52:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:55,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:55,982 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-31 16:52:55,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 71 [2024-01-31 16:52:56,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:52:56,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260625710] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:56,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:52:56,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 13] total 33 [2024-01-31 16:52:56,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950935101] [2024-01-31 16:52:56,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:56,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:52:56,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:56,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:52:56,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2024-01-31 16:52:56,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:56,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 88 transitions, 923 flow. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:56,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:56,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:56,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:56,870 INFO L124 PetriNetUnfolderBase]: 800/1379 cut-off events. [2024-01-31 16:52:56,871 INFO L125 PetriNetUnfolderBase]: For 8165/8165 co-relation queries the response was YES. [2024-01-31 16:52:56,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7101 conditions, 1379 events. 800/1379 cut-off events. For 8165/8165 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6507 event pairs, 126 based on Foata normal form. 1/1379 useless extension candidates. Maximal degree in co-relation 7062. Up to 688 conditions per place. [2024-01-31 16:52:56,878 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 119 selfloop transitions, 63 changer transitions 12/195 dead transitions. [2024-01-31 16:52:56,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 195 transitions, 2123 flow [2024-01-31 16:52:56,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 16:52:56,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 16:52:56,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 190 transitions. [2024-01-31 16:52:56,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31932773109243695 [2024-01-31 16:52:56,880 INFO L175 Difference]: Start difference. First operand has 115 places, 88 transitions, 923 flow. Second operand 17 states and 190 transitions. [2024-01-31 16:52:56,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 195 transitions, 2123 flow [2024-01-31 16:52:56,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 195 transitions, 2033 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-01-31 16:52:56,897 INFO L231 Difference]: Finished difference. Result has 129 places, 123 transitions, 1554 flow [2024-01-31 16:52:56,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1554, PETRI_PLACES=129, PETRI_TRANSITIONS=123} [2024-01-31 16:52:56,898 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 98 predicate places. [2024-01-31 16:52:56,898 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 123 transitions, 1554 flow [2024-01-31 16:52:56,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:56,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:56,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:56,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-01-31 16:52:57,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-01-31 16:52:57,103 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:57,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:57,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1851074466, now seen corresponding path program 8 times [2024-01-31 16:52:57,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:57,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290275447] [2024-01-31 16:52:57,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:57,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:57,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:57,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290275447] [2024-01-31 16:52:57,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290275447] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:57,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962011761] [2024-01-31 16:52:57,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:52:57,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:57,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:57,725 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:52:57,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-01-31 16:52:57,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-31 16:52:57,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:57,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:52:57,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:57,982 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-31 16:52:57,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-01-31 16:52:58,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:52:58,065 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:52:58,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962011761] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:52:58,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:52:58,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2024-01-31 16:52:58,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137895641] [2024-01-31 16:52:58,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:58,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:52:58,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:58,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:52:58,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:52:58,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:58,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 123 transitions, 1554 flow. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:58,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:58,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:58,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:58,476 INFO L124 PetriNetUnfolderBase]: 847/1456 cut-off events. [2024-01-31 16:52:58,476 INFO L125 PetriNetUnfolderBase]: For 10384/10384 co-relation queries the response was YES. [2024-01-31 16:52:58,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8216 conditions, 1456 events. 847/1456 cut-off events. For 10384/10384 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6962 event pairs, 333 based on Foata normal form. 1/1456 useless extension candidates. Maximal degree in co-relation 8169. Up to 979 conditions per place. [2024-01-31 16:52:58,486 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 123 selfloop transitions, 62 changer transitions 11/197 dead transitions. [2024-01-31 16:52:58,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 197 transitions, 2665 flow [2024-01-31 16:52:58,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:52:58,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:52:58,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-01-31 16:52:58,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3220779220779221 [2024-01-31 16:52:58,487 INFO L175 Difference]: Start difference. First operand has 129 places, 123 transitions, 1554 flow. Second operand 11 states and 124 transitions. [2024-01-31 16:52:58,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 197 transitions, 2665 flow [2024-01-31 16:52:58,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 197 transitions, 2423 flow, removed 121 selfloop flow, removed 1 redundant places. [2024-01-31 16:52:58,539 INFO L231 Difference]: Finished difference. Result has 143 places, 142 transitions, 1871 flow [2024-01-31 16:52:58,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1406, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1871, PETRI_PLACES=143, PETRI_TRANSITIONS=142} [2024-01-31 16:52:58,539 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 112 predicate places. [2024-01-31 16:52:58,539 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 142 transitions, 1871 flow [2024-01-31 16:52:58,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:58,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:58,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:58,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-01-31 16:52:58,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:58,748 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:58,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:58,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1984380184, now seen corresponding path program 9 times [2024-01-31 16:52:58,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:58,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966001137] [2024-01-31 16:52:58,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:58,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:58,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:59,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:59,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:59,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966001137] [2024-01-31 16:52:59,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966001137] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:59,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765079939] [2024-01-31 16:52:59,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:52:59,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:59,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:59,296 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:52:59,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-01-31 16:52:59,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-01-31 16:52:59,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:59,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:52:59,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:59,549 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-31 16:52:59,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-01-31 16:52:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:52:59,611 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:52:59,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765079939] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:52:59,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:52:59,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2024-01-31 16:52:59,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545523478] [2024-01-31 16:52:59,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:52:59,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:52:59,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:59,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:52:59,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:52:59,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:52:59,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 142 transitions, 1871 flow. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:52:59,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:59,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:52:59,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:59,964 INFO L124 PetriNetUnfolderBase]: 870/1499 cut-off events. [2024-01-31 16:52:59,964 INFO L125 PetriNetUnfolderBase]: For 10325/10325 co-relation queries the response was YES. [2024-01-31 16:52:59,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8535 conditions, 1499 events. 870/1499 cut-off events. For 10325/10325 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7234 event pairs, 353 based on Foata normal form. 1/1499 useless extension candidates. Maximal degree in co-relation 8481. Up to 1005 conditions per place. [2024-01-31 16:52:59,973 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 120 selfloop transitions, 60 changer transitions 11/192 dead transitions. [2024-01-31 16:52:59,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 192 transitions, 2642 flow [2024-01-31 16:52:59,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:52:59,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:52:59,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-01-31 16:52:59,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3168831168831169 [2024-01-31 16:52:59,974 INFO L175 Difference]: Start difference. First operand has 143 places, 142 transitions, 1871 flow. Second operand 11 states and 122 transitions. [2024-01-31 16:52:59,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 192 transitions, 2642 flow [2024-01-31 16:53:00,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 192 transitions, 2577 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-01-31 16:53:00,004 INFO L231 Difference]: Finished difference. Result has 153 places, 152 transitions, 2135 flow [2024-01-31 16:53:00,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1814, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2135, PETRI_PLACES=153, PETRI_TRANSITIONS=152} [2024-01-31 16:53:00,005 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 122 predicate places. [2024-01-31 16:53:00,005 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 152 transitions, 2135 flow [2024-01-31 16:53:00,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:00,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:00,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:00,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-01-31 16:53:00,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:00,219 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:00,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:00,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1732146138, now seen corresponding path program 10 times [2024-01-31 16:53:00,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:00,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136770339] [2024-01-31 16:53:00,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:00,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:00,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:00,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136770339] [2024-01-31 16:53:00,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136770339] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:00,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209965004] [2024-01-31 16:53:00,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:53:00,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:00,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:00,751 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:00,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-01-31 16:53:00,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:53:00,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:00,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 44 conjunts are in the unsatisfiable core [2024-01-31 16:53:00,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:01,253 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-01-31 16:53:01,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 47 [2024-01-31 16:53:01,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:01,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:01,646 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:53:01,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 82 [2024-01-31 16:53:01,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:01,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209965004] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:01,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:53:01,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13, 14] total 35 [2024-01-31 16:53:01,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621238063] [2024-01-31 16:53:01,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:01,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:01,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:01,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:01,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2024-01-31 16:53:01,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:01,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 152 transitions, 2135 flow. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:01,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:01,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:01,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:02,794 INFO L124 PetriNetUnfolderBase]: 942/1660 cut-off events. [2024-01-31 16:53:02,794 INFO L125 PetriNetUnfolderBase]: For 12121/12121 co-relation queries the response was YES. [2024-01-31 16:53:02,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9222 conditions, 1660 events. 942/1660 cut-off events. For 12121/12121 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8441 event pairs, 139 based on Foata normal form. 1/1660 useless extension candidates. Maximal degree in co-relation 9165. Up to 582 conditions per place. [2024-01-31 16:53:02,806 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 152 selfloop transitions, 83 changer transitions 10/246 dead transitions. [2024-01-31 16:53:02,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 246 transitions, 3280 flow [2024-01-31 16:53:02,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-31 16:53:02,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-31 16:53:02,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 192 transitions. [2024-01-31 16:53:02,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3047619047619048 [2024-01-31 16:53:02,809 INFO L175 Difference]: Start difference. First operand has 153 places, 152 transitions, 2135 flow. Second operand 18 states and 192 transitions. [2024-01-31 16:53:02,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 246 transitions, 3280 flow [2024-01-31 16:53:02,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 246 transitions, 3188 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-01-31 16:53:02,848 INFO L231 Difference]: Finished difference. Result has 172 places, 161 transitions, 2391 flow [2024-01-31 16:53:02,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2057, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2391, PETRI_PLACES=172, PETRI_TRANSITIONS=161} [2024-01-31 16:53:02,850 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 141 predicate places. [2024-01-31 16:53:02,850 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 161 transitions, 2391 flow [2024-01-31 16:53:02,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:02,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:02,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:02,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:03,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:03,062 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:03,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:03,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1868814054, now seen corresponding path program 11 times [2024-01-31 16:53:03,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:03,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447636698] [2024-01-31 16:53:03,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:03,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:03,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:03,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:03,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447636698] [2024-01-31 16:53:03,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447636698] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:03,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458744972] [2024-01-31 16:53:03,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:53:03,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:03,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:03,625 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:03,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-01-31 16:53:03,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:53:03,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:03,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-31 16:53:03,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:04,053 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-31 16:53:04,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-01-31 16:53:04,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:04,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:04,500 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:53:04,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 63 [2024-01-31 16:53:04,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:04,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458744972] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:04,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:53:04,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 13] total 33 [2024-01-31 16:53:04,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448064403] [2024-01-31 16:53:04,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:04,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:53:04,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:04,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:53:04,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2024-01-31 16:53:04,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:04,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 161 transitions, 2391 flow. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:04,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:04,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:04,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:05,420 INFO L124 PetriNetUnfolderBase]: 938/1656 cut-off events. [2024-01-31 16:53:05,420 INFO L125 PetriNetUnfolderBase]: For 13585/13585 co-relation queries the response was YES. [2024-01-31 16:53:05,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9461 conditions, 1656 events. 938/1656 cut-off events. For 13585/13585 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8464 event pairs, 154 based on Foata normal form. 1/1656 useless extension candidates. Maximal degree in co-relation 9399. Up to 634 conditions per place. [2024-01-31 16:53:05,431 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 140 selfloop transitions, 90 changer transitions 10/241 dead transitions. [2024-01-31 16:53:05,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 241 transitions, 3392 flow [2024-01-31 16:53:05,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:53:05,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:53:05,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 172 transitions. [2024-01-31 16:53:05,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3510204081632653 [2024-01-31 16:53:05,434 INFO L175 Difference]: Start difference. First operand has 172 places, 161 transitions, 2391 flow. Second operand 14 states and 172 transitions. [2024-01-31 16:53:05,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 241 transitions, 3392 flow [2024-01-31 16:53:05,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 241 transitions, 3307 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-01-31 16:53:05,477 INFO L231 Difference]: Finished difference. Result has 180 places, 168 transitions, 2625 flow [2024-01-31 16:53:05,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2315, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2625, PETRI_PLACES=180, PETRI_TRANSITIONS=168} [2024-01-31 16:53:05,477 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 149 predicate places. [2024-01-31 16:53:05,478 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 168 transitions, 2625 flow [2024-01-31 16:53:05,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:05,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:05,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:05,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:05,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-01-31 16:53:05,691 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:05,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:05,691 INFO L85 PathProgramCache]: Analyzing trace with hash -93701108, now seen corresponding path program 12 times [2024-01-31 16:53:05,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:05,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074769966] [2024-01-31 16:53:05,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:05,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:06,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:06,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:06,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074769966] [2024-01-31 16:53:06,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074769966] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:06,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039917339] [2024-01-31 16:53:06,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:53:06,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:06,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:06,229 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:06,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-01-31 16:53:06,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-01-31 16:53:06,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:06,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:53:06,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:06,452 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-31 16:53:06,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-01-31 16:53:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:06,546 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:53:06,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039917339] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:06,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:53:06,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2024-01-31 16:53:06,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167480257] [2024-01-31 16:53:06,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:06,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:53:06,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:06,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:53:06,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:53:06,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:06,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 168 transitions, 2625 flow. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:06,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:06,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:06,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:07,030 INFO L124 PetriNetUnfolderBase]: 930/1644 cut-off events. [2024-01-31 16:53:07,031 INFO L125 PetriNetUnfolderBase]: For 14513/14513 co-relation queries the response was YES. [2024-01-31 16:53:07,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9655 conditions, 1644 events. 930/1644 cut-off events. For 14513/14513 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8396 event pairs, 311 based on Foata normal form. 1/1644 useless extension candidates. Maximal degree in co-relation 9593. Up to 853 conditions per place. [2024-01-31 16:53:07,042 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 151 selfloop transitions, 63 changer transitions 18/233 dead transitions. [2024-01-31 16:53:07,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 233 transitions, 3417 flow [2024-01-31 16:53:07,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:53:07,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:53:07,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 143 transitions. [2024-01-31 16:53:07,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3404761904761905 [2024-01-31 16:53:07,044 INFO L175 Difference]: Start difference. First operand has 180 places, 168 transitions, 2625 flow. Second operand 12 states and 143 transitions. [2024-01-31 16:53:07,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 233 transitions, 3417 flow [2024-01-31 16:53:07,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 233 transitions, 3256 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-01-31 16:53:07,090 INFO L231 Difference]: Finished difference. Result has 181 places, 163 transitions, 2511 flow [2024-01-31 16:53:07,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2466, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2511, PETRI_PLACES=181, PETRI_TRANSITIONS=163} [2024-01-31 16:53:07,091 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 150 predicate places. [2024-01-31 16:53:07,091 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 163 transitions, 2511 flow [2024-01-31 16:53:07,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:07,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:07,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:07,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:07,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-01-31 16:53:07,303 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:07,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:07,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1526131760, now seen corresponding path program 13 times [2024-01-31 16:53:07,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:07,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595487765] [2024-01-31 16:53:07,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:07,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:07,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:07,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595487765] [2024-01-31 16:53:07,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595487765] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:07,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224360818] [2024-01-31 16:53:07,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:53:07,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:07,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:07,892 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:07,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-01-31 16:53:08,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:08,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-31 16:53:08,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:08,264 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-31 16:53:08,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-01-31 16:53:08,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:08,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:08,939 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:53:08,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 63 [2024-01-31 16:53:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:08,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224360818] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:08,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:53:08,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 13] total 33 [2024-01-31 16:53:08,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906041793] [2024-01-31 16:53:08,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:08,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:53:08,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:08,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:53:08,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2024-01-31 16:53:08,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:08,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 163 transitions, 2511 flow. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:08,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:08,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:08,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:09,906 INFO L124 PetriNetUnfolderBase]: 915/1617 cut-off events. [2024-01-31 16:53:09,906 INFO L125 PetriNetUnfolderBase]: For 13685/13685 co-relation queries the response was YES. [2024-01-31 16:53:09,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9399 conditions, 1617 events. 915/1617 cut-off events. For 13685/13685 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8155 event pairs, 182 based on Foata normal form. 1/1617 useless extension candidates. Maximal degree in co-relation 9338. Up to 920 conditions per place. [2024-01-31 16:53:09,917 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 119 selfloop transitions, 86 changer transitions 14/220 dead transitions. [2024-01-31 16:53:09,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 220 transitions, 3246 flow [2024-01-31 16:53:09,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:53:09,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:53:09,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 164 transitions. [2024-01-31 16:53:09,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3346938775510204 [2024-01-31 16:53:09,918 INFO L175 Difference]: Start difference. First operand has 181 places, 163 transitions, 2511 flow. Second operand 14 states and 164 transitions. [2024-01-31 16:53:09,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 220 transitions, 3246 flow [2024-01-31 16:53:09,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 220 transitions, 3114 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-01-31 16:53:09,957 INFO L231 Difference]: Finished difference. Result has 180 places, 161 transitions, 2522 flow [2024-01-31 16:53:09,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2379, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2522, PETRI_PLACES=180, PETRI_TRANSITIONS=161} [2024-01-31 16:53:09,958 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 149 predicate places. [2024-01-31 16:53:09,958 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 161 transitions, 2522 flow [2024-01-31 16:53:09,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:09,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:09,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:09,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:10,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-01-31 16:53:10,170 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:10,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:10,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1072859210, now seen corresponding path program 14 times [2024-01-31 16:53:10,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:10,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840813386] [2024-01-31 16:53:10,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:10,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:10,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:10,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:10,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840813386] [2024-01-31 16:53:10,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840813386] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:10,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442763006] [2024-01-31 16:53:10,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:53:10,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:10,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:10,642 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:10,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-01-31 16:53:10,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-31 16:53:10,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:10,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:53:10,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:10,870 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-31 16:53:10,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-01-31 16:53:10,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:10,964 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:53:10,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442763006] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:10,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:53:10,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2024-01-31 16:53:10,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798640116] [2024-01-31 16:53:10,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:10,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:53:10,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:10,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:53:10,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:53:10,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:10,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 161 transitions, 2522 flow. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:10,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:10,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:10,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:11,284 INFO L124 PetriNetUnfolderBase]: 930/1649 cut-off events. [2024-01-31 16:53:11,284 INFO L125 PetriNetUnfolderBase]: For 13667/13667 co-relation queries the response was YES. [2024-01-31 16:53:11,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9543 conditions, 1649 events. 930/1649 cut-off events. For 13667/13667 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8400 event pairs, 405 based on Foata normal form. 2/1650 useless extension candidates. Maximal degree in co-relation 9483. Up to 1157 conditions per place. [2024-01-31 16:53:11,296 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 131 selfloop transitions, 60 changer transitions 15/207 dead transitions. [2024-01-31 16:53:11,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 207 transitions, 3180 flow [2024-01-31 16:53:11,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:53:11,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:53:11,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-01-31 16:53:11,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523809523809524 [2024-01-31 16:53:11,297 INFO L175 Difference]: Start difference. First operand has 180 places, 161 transitions, 2522 flow. Second operand 9 states and 111 transitions. [2024-01-31 16:53:11,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 207 transitions, 3180 flow [2024-01-31 16:53:11,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 207 transitions, 3052 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-01-31 16:53:11,337 INFO L231 Difference]: Finished difference. Result has 175 places, 159 transitions, 2492 flow [2024-01-31 16:53:11,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2396, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2492, PETRI_PLACES=175, PETRI_TRANSITIONS=159} [2024-01-31 16:53:11,338 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 144 predicate places. [2024-01-31 16:53:11,338 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 159 transitions, 2492 flow [2024-01-31 16:53:11,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:11,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:11,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:11,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:11,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:11,545 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:11,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:11,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1047469360, now seen corresponding path program 15 times [2024-01-31 16:53:11,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:11,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477219050] [2024-01-31 16:53:11,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:11,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:12,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:12,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477219050] [2024-01-31 16:53:12,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477219050] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:12,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610110026] [2024-01-31 16:53:12,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:53:12,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:12,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:12,028 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:12,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-01-31 16:53:12,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-01-31 16:53:12,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:12,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:53:12,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:12,238 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-31 16:53:12,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-01-31 16:53:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:12,329 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:53:12,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610110026] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:12,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:53:12,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2024-01-31 16:53:12,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049040706] [2024-01-31 16:53:12,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:12,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:53:12,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:12,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:53:12,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:53:12,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:12,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 159 transitions, 2492 flow. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:12,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:12,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:12,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:12,713 INFO L124 PetriNetUnfolderBase]: 899/1578 cut-off events. [2024-01-31 16:53:12,713 INFO L125 PetriNetUnfolderBase]: For 14107/14107 co-relation queries the response was YES. [2024-01-31 16:53:12,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9295 conditions, 1578 events. 899/1578 cut-off events. For 14107/14107 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7809 event pairs, 389 based on Foata normal form. 1/1578 useless extension candidates. Maximal degree in co-relation 9236. Up to 1109 conditions per place. [2024-01-31 16:53:12,724 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 124 selfloop transitions, 54 changer transitions 14/193 dead transitions. [2024-01-31 16:53:12,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 193 transitions, 3035 flow [2024-01-31 16:53:12,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:53:12,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:53:12,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-01-31 16:53:12,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32571428571428573 [2024-01-31 16:53:12,726 INFO L175 Difference]: Start difference. First operand has 175 places, 159 transitions, 2492 flow. Second operand 10 states and 114 transitions. [2024-01-31 16:53:12,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 193 transitions, 3035 flow [2024-01-31 16:53:12,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 193 transitions, 2906 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-01-31 16:53:12,768 INFO L231 Difference]: Finished difference. Result has 177 places, 156 transitions, 2425 flow [2024-01-31 16:53:12,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2363, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2425, PETRI_PLACES=177, PETRI_TRANSITIONS=156} [2024-01-31 16:53:12,768 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 146 predicate places. [2024-01-31 16:53:12,769 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 156 transitions, 2425 flow [2024-01-31 16:53:12,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:12,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:12,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:12,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:12,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-01-31 16:53:12,980 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:12,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:12,980 INFO L85 PathProgramCache]: Analyzing trace with hash -130647060, now seen corresponding path program 16 times [2024-01-31 16:53:12,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:12,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663121080] [2024-01-31 16:53:12,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:12,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:13,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:13,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:13,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:13,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663121080] [2024-01-31 16:53:13,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663121080] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:13,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609330882] [2024-01-31 16:53:13,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:53:13,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:13,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:13,515 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:13,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-01-31 16:53:13,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:53:13,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:13,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-31 16:53:13,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:13,917 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-31 16:53:13,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-01-31 16:53:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:53:13,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:14,270 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-31 16:53:14,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 71 [2024-01-31 16:53:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:14,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609330882] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:14,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:53:14,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 13] total 33 [2024-01-31 16:53:14,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601221939] [2024-01-31 16:53:14,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:14,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:53:14,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:14,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:53:14,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2024-01-31 16:53:14,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:14,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 156 transitions, 2425 flow. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:14,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:14,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:14,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:15,067 INFO L124 PetriNetUnfolderBase]: 918/1609 cut-off events. [2024-01-31 16:53:15,068 INFO L125 PetriNetUnfolderBase]: For 14262/14262 co-relation queries the response was YES. [2024-01-31 16:53:15,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9411 conditions, 1609 events. 918/1609 cut-off events. For 14262/14262 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8009 event pairs, 178 based on Foata normal form. 1/1609 useless extension candidates. Maximal degree in co-relation 9352. Up to 924 conditions per place. [2024-01-31 16:53:15,079 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 113 selfloop transitions, 87 changer transitions 10/211 dead transitions. [2024-01-31 16:53:15,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 211 transitions, 3181 flow [2024-01-31 16:53:15,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:53:15,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:53:15,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 166 transitions. [2024-01-31 16:53:15,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33877551020408164 [2024-01-31 16:53:15,080 INFO L175 Difference]: Start difference. First operand has 177 places, 156 transitions, 2425 flow. Second operand 14 states and 166 transitions. [2024-01-31 16:53:15,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 211 transitions, 3181 flow [2024-01-31 16:53:15,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 211 transitions, 3020 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-01-31 16:53:15,123 INFO L231 Difference]: Finished difference. Result has 180 places, 162 transitions, 2560 flow [2024-01-31 16:53:15,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2281, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2560, PETRI_PLACES=180, PETRI_TRANSITIONS=162} [2024-01-31 16:53:15,124 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 149 predicate places. [2024-01-31 16:53:15,124 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 162 transitions, 2560 flow [2024-01-31 16:53:15,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:15,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:15,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:15,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-01-31 16:53:15,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-01-31 16:53:15,336 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:15,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:15,336 INFO L85 PathProgramCache]: Analyzing trace with hash -2015633394, now seen corresponding path program 17 times [2024-01-31 16:53:15,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:15,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925286302] [2024-01-31 16:53:15,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:15,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:15,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:15,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925286302] [2024-01-31 16:53:15,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925286302] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:15,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567282674] [2024-01-31 16:53:15,861 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:53:15,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:15,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:15,862 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:15,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-01-31 16:53:15,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:53:15,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:15,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-31 16:53:15,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:16,230 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-31 16:53:16,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-01-31 16:53:16,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:16,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:16,698 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-31 16:53:16,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 71 [2024-01-31 16:53:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:16,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567282674] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:16,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:53:16,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 13] total 33 [2024-01-31 16:53:16,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780503876] [2024-01-31 16:53:16,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:16,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:53:16,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:16,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:53:16,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2024-01-31 16:53:16,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:16,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 162 transitions, 2560 flow. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:16,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:16,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:16,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:17,601 INFO L124 PetriNetUnfolderBase]: 900/1570 cut-off events. [2024-01-31 16:53:17,604 INFO L125 PetriNetUnfolderBase]: For 13511/13511 co-relation queries the response was YES. [2024-01-31 16:53:17,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9338 conditions, 1570 events. 900/1570 cut-off events. For 13511/13511 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7724 event pairs, 166 based on Foata normal form. 1/1570 useless extension candidates. Maximal degree in co-relation 9277. Up to 864 conditions per place. [2024-01-31 16:53:17,624 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 117 selfloop transitions, 85 changer transitions 13/216 dead transitions. [2024-01-31 16:53:17,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 216 transitions, 3226 flow [2024-01-31 16:53:17,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 16:53:17,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 16:53:17,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 168 transitions. [2024-01-31 16:53:17,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32 [2024-01-31 16:53:17,625 INFO L175 Difference]: Start difference. First operand has 180 places, 162 transitions, 2560 flow. Second operand 15 states and 168 transitions. [2024-01-31 16:53:17,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 216 transitions, 3226 flow [2024-01-31 16:53:17,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 216 transitions, 3133 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-01-31 16:53:17,668 INFO L231 Difference]: Finished difference. Result has 191 places, 156 transitions, 2543 flow [2024-01-31 16:53:17,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2470, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2543, PETRI_PLACES=191, PETRI_TRANSITIONS=156} [2024-01-31 16:53:17,670 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 160 predicate places. [2024-01-31 16:53:17,670 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 156 transitions, 2543 flow [2024-01-31 16:53:17,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:17,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:17,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:17,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-01-31 16:53:17,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-01-31 16:53:17,874 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:17,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:17,874 INFO L85 PathProgramCache]: Analyzing trace with hash -722296796, now seen corresponding path program 18 times [2024-01-31 16:53:17,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:17,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412375195] [2024-01-31 16:53:17,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:17,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:18,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:18,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412375195] [2024-01-31 16:53:18,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412375195] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:18,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216463956] [2024-01-31 16:53:18,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:53:18,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:18,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:18,482 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:18,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-01-31 16:53:18,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-01-31 16:53:18,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:18,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:53:18,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:18,800 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-31 16:53:18,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-01-31 16:53:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:18,852 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:53:18,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216463956] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:18,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:53:18,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2024-01-31 16:53:18,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386637770] [2024-01-31 16:53:18,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:18,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:53:18,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:18,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:53:18,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:53:18,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:18,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 156 transitions, 2543 flow. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:18,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:18,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:18,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:19,231 INFO L124 PetriNetUnfolderBase]: 880/1523 cut-off events. [2024-01-31 16:53:19,231 INFO L125 PetriNetUnfolderBase]: For 13949/13949 co-relation queries the response was YES. [2024-01-31 16:53:19,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9231 conditions, 1523 events. 880/1523 cut-off events. For 13949/13949 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7329 event pairs, 377 based on Foata normal form. 1/1523 useless extension candidates. Maximal degree in co-relation 9169. Up to 1083 conditions per place. [2024-01-31 16:53:19,242 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 127 selfloop transitions, 53 changer transitions 12/193 dead transitions. [2024-01-31 16:53:19,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 193 transitions, 3086 flow [2024-01-31 16:53:19,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:53:19,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:53:19,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-01-31 16:53:19,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32285714285714284 [2024-01-31 16:53:19,243 INFO L175 Difference]: Start difference. First operand has 191 places, 156 transitions, 2543 flow. Second operand 10 states and 113 transitions. [2024-01-31 16:53:19,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 193 transitions, 3086 flow [2024-01-31 16:53:19,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 193 transitions, 2923 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-01-31 16:53:19,279 INFO L231 Difference]: Finished difference. Result has 184 places, 155 transitions, 2486 flow [2024-01-31 16:53:19,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2380, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2486, PETRI_PLACES=184, PETRI_TRANSITIONS=155} [2024-01-31 16:53:19,280 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 153 predicate places. [2024-01-31 16:53:19,280 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 155 transitions, 2486 flow [2024-01-31 16:53:19,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:19,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:19,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:19,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-01-31 16:53:19,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-01-31 16:53:19,492 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:19,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:19,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1214501224, now seen corresponding path program 1 times [2024-01-31 16:53:19,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:19,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340506527] [2024-01-31 16:53:19,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:19,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:19,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:19,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340506527] [2024-01-31 16:53:19,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340506527] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:19,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:19,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:19,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662437684] [2024-01-31 16:53:19,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:19,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:19,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:19,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:19,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:19,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:19,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 155 transitions, 2486 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:19,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:19,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:19,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:20,016 INFO L124 PetriNetUnfolderBase]: 897/1539 cut-off events. [2024-01-31 16:53:20,017 INFO L125 PetriNetUnfolderBase]: For 14947/14947 co-relation queries the response was YES. [2024-01-31 16:53:20,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9518 conditions, 1539 events. 897/1539 cut-off events. For 14947/14947 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7460 event pairs, 385 based on Foata normal form. 12/1550 useless extension candidates. Maximal degree in co-relation 9456. Up to 1164 conditions per place. [2024-01-31 16:53:20,027 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 143 selfloop transitions, 60 changer transitions 0/204 dead transitions. [2024-01-31 16:53:20,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 204 transitions, 3471 flow [2024-01-31 16:53:20,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:53:20,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:53:20,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-01-31 16:53:20,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32063492063492066 [2024-01-31 16:53:20,029 INFO L175 Difference]: Start difference. First operand has 184 places, 155 transitions, 2486 flow. Second operand 9 states and 101 transitions. [2024-01-31 16:53:20,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 204 transitions, 3471 flow [2024-01-31 16:53:20,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 204 transitions, 3286 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-01-31 16:53:20,074 INFO L231 Difference]: Finished difference. Result has 180 places, 167 transitions, 2730 flow [2024-01-31 16:53:20,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2318, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2730, PETRI_PLACES=180, PETRI_TRANSITIONS=167} [2024-01-31 16:53:20,075 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 149 predicate places. [2024-01-31 16:53:20,075 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 167 transitions, 2730 flow [2024-01-31 16:53:20,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:20,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:20,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:20,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-01-31 16:53:20,076 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:20,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:20,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1266197722, now seen corresponding path program 2 times [2024-01-31 16:53:20,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:20,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840641514] [2024-01-31 16:53:20,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:20,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:20,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:20,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:20,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840641514] [2024-01-31 16:53:20,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840641514] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:20,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:20,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:20,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582556887] [2024-01-31 16:53:20,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:20,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:20,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:20,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:20,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:20,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:20,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 167 transitions, 2730 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:20,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:20,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:20,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:20,533 INFO L124 PetriNetUnfolderBase]: 989/1679 cut-off events. [2024-01-31 16:53:20,533 INFO L125 PetriNetUnfolderBase]: For 16100/16100 co-relation queries the response was YES. [2024-01-31 16:53:20,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10716 conditions, 1679 events. 989/1679 cut-off events. For 16100/16100 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8224 event pairs, 417 based on Foata normal form. 12/1691 useless extension candidates. Maximal degree in co-relation 10653. Up to 1200 conditions per place. [2024-01-31 16:53:20,544 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 148 selfloop transitions, 62 changer transitions 0/211 dead transitions. [2024-01-31 16:53:20,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 211 transitions, 3642 flow [2024-01-31 16:53:20,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:53:20,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:53:20,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-01-31 16:53:20,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-01-31 16:53:20,547 INFO L175 Difference]: Start difference. First operand has 180 places, 167 transitions, 2730 flow. Second operand 9 states and 105 transitions. [2024-01-31 16:53:20,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 211 transitions, 3642 flow [2024-01-31 16:53:20,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 211 transitions, 3498 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-01-31 16:53:20,595 INFO L231 Difference]: Finished difference. Result has 185 places, 173 transitions, 2871 flow [2024-01-31 16:53:20,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2608, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2871, PETRI_PLACES=185, PETRI_TRANSITIONS=173} [2024-01-31 16:53:20,595 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 154 predicate places. [2024-01-31 16:53:20,596 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 173 transitions, 2871 flow [2024-01-31 16:53:20,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:20,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:20,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:20,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-01-31 16:53:20,596 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:20,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:20,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1307789036, now seen corresponding path program 3 times [2024-01-31 16:53:20,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:20,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353245822] [2024-01-31 16:53:20,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:20,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:20,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:20,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353245822] [2024-01-31 16:53:20,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353245822] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:20,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:20,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:20,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686242259] [2024-01-31 16:53:20,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:20,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:20,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:20,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:20,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:20,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:20,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 173 transitions, 2871 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:20,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:20,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:20,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:21,168 INFO L124 PetriNetUnfolderBase]: 969/1659 cut-off events. [2024-01-31 16:53:21,169 INFO L125 PetriNetUnfolderBase]: For 16181/16181 co-relation queries the response was YES. [2024-01-31 16:53:21,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10526 conditions, 1659 events. 969/1659 cut-off events. For 16181/16181 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8279 event pairs, 313 based on Foata normal form. 20/1679 useless extension candidates. Maximal degree in co-relation 10461. Up to 898 conditions per place. [2024-01-31 16:53:21,180 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 147 selfloop transitions, 59 changer transitions 23/230 dead transitions. [2024-01-31 16:53:21,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 230 transitions, 3669 flow [2024-01-31 16:53:21,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:53:21,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:53:21,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 134 transitions. [2024-01-31 16:53:21,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.319047619047619 [2024-01-31 16:53:21,181 INFO L175 Difference]: Start difference. First operand has 185 places, 173 transitions, 2871 flow. Second operand 12 states and 134 transitions. [2024-01-31 16:53:21,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 230 transitions, 3669 flow [2024-01-31 16:53:21,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 230 transitions, 3564 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-01-31 16:53:21,229 INFO L231 Difference]: Finished difference. Result has 192 places, 163 transitions, 2723 flow [2024-01-31 16:53:21,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2692, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2723, PETRI_PLACES=192, PETRI_TRANSITIONS=163} [2024-01-31 16:53:21,230 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 161 predicate places. [2024-01-31 16:53:21,230 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 163 transitions, 2723 flow [2024-01-31 16:53:21,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:21,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:21,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:21,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-01-31 16:53:21,230 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:21,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:21,231 INFO L85 PathProgramCache]: Analyzing trace with hash -981836018, now seen corresponding path program 4 times [2024-01-31 16:53:21,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:21,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859253054] [2024-01-31 16:53:21,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:21,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:21,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:21,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859253054] [2024-01-31 16:53:21,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859253054] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:21,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:21,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:21,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833143000] [2024-01-31 16:53:21,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:21,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:21,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:21,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:21,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:21,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:21,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 163 transitions, 2723 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:21,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:21,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:21,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:21,758 INFO L124 PetriNetUnfolderBase]: 972/1642 cut-off events. [2024-01-31 16:53:21,758 INFO L125 PetriNetUnfolderBase]: For 17424/17424 co-relation queries the response was YES. [2024-01-31 16:53:21,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10715 conditions, 1642 events. 972/1642 cut-off events. For 17424/17424 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 7897 event pairs, 405 based on Foata normal form. 12/1654 useless extension candidates. Maximal degree in co-relation 10649. Up to 1144 conditions per place. [2024-01-31 16:53:21,771 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 129 selfloop transitions, 63 changer transitions 0/193 dead transitions. [2024-01-31 16:53:21,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 193 transitions, 3442 flow [2024-01-31 16:53:21,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:53:21,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:53:21,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-01-31 16:53:21,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3142857142857143 [2024-01-31 16:53:21,772 INFO L175 Difference]: Start difference. First operand has 192 places, 163 transitions, 2723 flow. Second operand 9 states and 99 transitions. [2024-01-31 16:53:21,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 193 transitions, 3442 flow [2024-01-31 16:53:21,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 193 transitions, 3252 flow, removed 13 selfloop flow, removed 15 redundant places. [2024-01-31 16:53:21,825 INFO L231 Difference]: Finished difference. Result has 180 places, 170 transitions, 2868 flow [2024-01-31 16:53:21,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2556, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2868, PETRI_PLACES=180, PETRI_TRANSITIONS=170} [2024-01-31 16:53:21,826 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 149 predicate places. [2024-01-31 16:53:21,826 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 170 transitions, 2868 flow [2024-01-31 16:53:21,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:21,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:21,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:21,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-01-31 16:53:21,827 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:21,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:21,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1937722396, now seen corresponding path program 1 times [2024-01-31 16:53:21,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:21,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963341723] [2024-01-31 16:53:21,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:21,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:22,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:22,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963341723] [2024-01-31 16:53:22,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963341723] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:22,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336701872] [2024-01-31 16:53:22,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:22,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:22,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:22,026 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:22,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-01-31 16:53:22,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:22,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-31 16:53:22,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:22,186 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-01-31 16:53:22,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-01-31 16:53:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:22,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:22,261 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:53:22,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-31 16:53:22,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:22,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336701872] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:22,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:22,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2024-01-31 16:53:22,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111123883] [2024-01-31 16:53:22,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:22,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 16:53:22,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:22,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 16:53:22,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:53:22,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:22,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 170 transitions, 2868 flow. Second operand has 17 states, 17 states have (on average 5.823529411764706) internal successors, (99), 17 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:22,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:22,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:22,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:22,773 INFO L124 PetriNetUnfolderBase]: 1028/1738 cut-off events. [2024-01-31 16:53:22,773 INFO L125 PetriNetUnfolderBase]: For 17057/17057 co-relation queries the response was YES. [2024-01-31 16:53:22,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11196 conditions, 1738 events. 1028/1738 cut-off events. For 17057/17057 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8629 event pairs, 189 based on Foata normal form. 20/1758 useless extension candidates. Maximal degree in co-relation 11133. Up to 796 conditions per place. [2024-01-31 16:53:22,785 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 173 selfloop transitions, 71 changer transitions 0/245 dead transitions. [2024-01-31 16:53:22,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 245 transitions, 4025 flow [2024-01-31 16:53:22,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:53:22,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:53:22,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-01-31 16:53:22,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3514285714285714 [2024-01-31 16:53:22,788 INFO L175 Difference]: Start difference. First operand has 180 places, 170 transitions, 2868 flow. Second operand 10 states and 123 transitions. [2024-01-31 16:53:22,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 245 transitions, 4025 flow [2024-01-31 16:53:22,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 245 transitions, 3937 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-01-31 16:53:22,836 INFO L231 Difference]: Finished difference. Result has 187 places, 174 transitions, 3006 flow [2024-01-31 16:53:22,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2783, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3006, PETRI_PLACES=187, PETRI_TRANSITIONS=174} [2024-01-31 16:53:22,837 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 156 predicate places. [2024-01-31 16:53:22,837 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 174 transitions, 3006 flow [2024-01-31 16:53:22,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.823529411764706) internal successors, (99), 17 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:22,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:22,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:22,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-01-31 16:53:23,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-01-31 16:53:23,048 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:23,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:23,049 INFO L85 PathProgramCache]: Analyzing trace with hash -979148940, now seen corresponding path program 5 times [2024-01-31 16:53:23,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:23,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311936316] [2024-01-31 16:53:23,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:23,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:23,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:23,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311936316] [2024-01-31 16:53:23,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311936316] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:23,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:23,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:23,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860992967] [2024-01-31 16:53:23,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:23,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:23,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:23,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:23,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:23,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:23,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 174 transitions, 3006 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:23,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:23,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:23,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:23,588 INFO L124 PetriNetUnfolderBase]: 1016/1726 cut-off events. [2024-01-31 16:53:23,588 INFO L125 PetriNetUnfolderBase]: For 18700/18700 co-relation queries the response was YES. [2024-01-31 16:53:23,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11253 conditions, 1726 events. 1016/1726 cut-off events. For 18700/18700 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8537 event pairs, 433 based on Foata normal form. 12/1738 useless extension candidates. Maximal degree in co-relation 11188. Up to 1240 conditions per place. [2024-01-31 16:53:23,601 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 136 selfloop transitions, 64 changer transitions 0/201 dead transitions. [2024-01-31 16:53:23,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 201 transitions, 3666 flow [2024-01-31 16:53:23,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:53:23,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:53:23,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-01-31 16:53:23,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32063492063492066 [2024-01-31 16:53:23,602 INFO L175 Difference]: Start difference. First operand has 187 places, 174 transitions, 3006 flow. Second operand 9 states and 101 transitions. [2024-01-31 16:53:23,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 201 transitions, 3666 flow [2024-01-31 16:53:23,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 201 transitions, 3448 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-01-31 16:53:23,655 INFO L231 Difference]: Finished difference. Result has 190 places, 179 transitions, 3080 flow [2024-01-31 16:53:23,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2792, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3080, PETRI_PLACES=190, PETRI_TRANSITIONS=179} [2024-01-31 16:53:23,656 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 159 predicate places. [2024-01-31 16:53:23,656 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 179 transitions, 3080 flow [2024-01-31 16:53:23,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:23,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:23,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:23,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-01-31 16:53:23,656 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:23,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:23,657 INFO L85 PathProgramCache]: Analyzing trace with hash -486141364, now seen corresponding path program 2 times [2024-01-31 16:53:23,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:23,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270560520] [2024-01-31 16:53:23,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:23,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:23,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:23,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:23,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270560520] [2024-01-31 16:53:23,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270560520] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:23,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096061858] [2024-01-31 16:53:23,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:53:23,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:23,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:23,829 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:23,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-01-31 16:53:23,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:53:23,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:23,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:53:23,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:24,008 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-31 16:53:24,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-01-31 16:53:24,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:24,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:24,078 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:53:24,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-31 16:53:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:24,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096061858] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:24,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:24,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-01-31 16:53:24,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70044167] [2024-01-31 16:53:24,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:24,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 16:53:24,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:24,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 16:53:24,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:53:24,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:24,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 179 transitions, 3080 flow. Second operand has 17 states, 17 states have (on average 5.823529411764706) internal successors, (99), 17 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:24,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:24,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:24,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:24,714 INFO L124 PetriNetUnfolderBase]: 1488/2528 cut-off events. [2024-01-31 16:53:24,714 INFO L125 PetriNetUnfolderBase]: For 23609/23609 co-relation queries the response was YES. [2024-01-31 16:53:24,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15415 conditions, 2528 events. 1488/2528 cut-off events. For 23609/23609 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13539 event pairs, 447 based on Foata normal form. 20/2548 useless extension candidates. Maximal degree in co-relation 15349. Up to 1176 conditions per place. [2024-01-31 16:53:24,730 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 209 selfloop transitions, 86 changer transitions 0/296 dead transitions. [2024-01-31 16:53:24,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 296 transitions, 4846 flow [2024-01-31 16:53:24,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:53:24,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:53:24,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 153 transitions. [2024-01-31 16:53:24,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2024-01-31 16:53:24,732 INFO L175 Difference]: Start difference. First operand has 190 places, 179 transitions, 3080 flow. Second operand 12 states and 153 transitions. [2024-01-31 16:53:24,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 296 transitions, 4846 flow [2024-01-31 16:53:24,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 296 transitions, 4773 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-01-31 16:53:24,794 INFO L231 Difference]: Finished difference. Result has 201 places, 196 transitions, 3518 flow [2024-01-31 16:53:24,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3007, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3518, PETRI_PLACES=201, PETRI_TRANSITIONS=196} [2024-01-31 16:53:24,795 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 170 predicate places. [2024-01-31 16:53:24,795 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 196 transitions, 3518 flow [2024-01-31 16:53:24,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.823529411764706) internal successors, (99), 17 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:24,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:24,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:24,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-01-31 16:53:25,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-01-31 16:53:25,007 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:25,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:25,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1577342488, now seen corresponding path program 3 times [2024-01-31 16:53:25,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:25,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891391462] [2024-01-31 16:53:25,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:25,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:25,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:25,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891391462] [2024-01-31 16:53:25,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891391462] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:25,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:25,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:25,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88697786] [2024-01-31 16:53:25,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:25,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:25,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:25,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:25,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:25,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:25,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 196 transitions, 3518 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:25,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:25,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:25,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:25,630 INFO L124 PetriNetUnfolderBase]: 1489/2535 cut-off events. [2024-01-31 16:53:25,631 INFO L125 PetriNetUnfolderBase]: For 28502/28502 co-relation queries the response was YES. [2024-01-31 16:53:25,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16171 conditions, 2535 events. 1489/2535 cut-off events. For 28502/28502 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13638 event pairs, 675 based on Foata normal form. 6/2541 useless extension candidates. Maximal degree in co-relation 16102. Up to 2038 conditions per place. [2024-01-31 16:53:25,651 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 146 selfloop transitions, 63 changer transitions 8/218 dead transitions. [2024-01-31 16:53:25,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 218 transitions, 4089 flow [2024-01-31 16:53:25,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:53:25,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:53:25,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 104 transitions. [2024-01-31 16:53:25,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2701298701298701 [2024-01-31 16:53:25,652 INFO L175 Difference]: Start difference. First operand has 201 places, 196 transitions, 3518 flow. Second operand 11 states and 104 transitions. [2024-01-31 16:53:25,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 218 transitions, 4089 flow [2024-01-31 16:53:25,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 218 transitions, 3935 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-01-31 16:53:25,734 INFO L231 Difference]: Finished difference. Result has 206 places, 194 transitions, 3448 flow [2024-01-31 16:53:25,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3368, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3448, PETRI_PLACES=206, PETRI_TRANSITIONS=194} [2024-01-31 16:53:25,735 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 175 predicate places. [2024-01-31 16:53:25,736 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 194 transitions, 3448 flow [2024-01-31 16:53:25,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:25,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:25,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:25,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-01-31 16:53:25,736 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:25,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:25,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1696397302, now seen corresponding path program 4 times [2024-01-31 16:53:25,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:25,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027139835] [2024-01-31 16:53:25,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:25,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:25,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:25,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:25,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027139835] [2024-01-31 16:53:25,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027139835] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:25,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126689242] [2024-01-31 16:53:25,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:53:25,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:25,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:25,953 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:25,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-01-31 16:53:26,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:53:26,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:26,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-31 16:53:26,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:26,105 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:53:26,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2024-01-31 16:53:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:26,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:26,197 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:53:26,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-31 16:53:26,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:26,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126689242] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:26,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:26,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-01-31 16:53:26,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904847270] [2024-01-31 16:53:26,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:26,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:53:26,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:26,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:53:26,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:53:26,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:26,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 194 transitions, 3448 flow. Second operand has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:26,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:26,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:26,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:26,980 INFO L124 PetriNetUnfolderBase]: 1685/2918 cut-off events. [2024-01-31 16:53:26,980 INFO L125 PetriNetUnfolderBase]: For 29848/29848 co-relation queries the response was YES. [2024-01-31 16:53:26,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17401 conditions, 2918 events. 1685/2918 cut-off events. For 29848/29848 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 16527 event pairs, 569 based on Foata normal form. 30/2948 useless extension candidates. Maximal degree in co-relation 17330. Up to 1592 conditions per place. [2024-01-31 16:53:27,003 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 232 selfloop transitions, 97 changer transitions 0/330 dead transitions. [2024-01-31 16:53:27,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 330 transitions, 5225 flow [2024-01-31 16:53:27,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-31 16:53:27,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-31 16:53:27,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 204 transitions. [2024-01-31 16:53:27,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3238095238095238 [2024-01-31 16:53:27,005 INFO L175 Difference]: Start difference. First operand has 206 places, 194 transitions, 3448 flow. Second operand 18 states and 204 transitions. [2024-01-31 16:53:27,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 330 transitions, 5225 flow [2024-01-31 16:53:27,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 330 transitions, 5065 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-01-31 16:53:27,101 INFO L231 Difference]: Finished difference. Result has 216 places, 213 transitions, 3840 flow [2024-01-31 16:53:27,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3297, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3840, PETRI_PLACES=216, PETRI_TRANSITIONS=213} [2024-01-31 16:53:27,102 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 185 predicate places. [2024-01-31 16:53:27,102 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 213 transitions, 3840 flow [2024-01-31 16:53:27,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:27,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:27,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:27,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-01-31 16:53:27,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-01-31 16:53:27,313 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:27,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:27,313 INFO L85 PathProgramCache]: Analyzing trace with hash -384746172, now seen corresponding path program 6 times [2024-01-31 16:53:27,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:27,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670190570] [2024-01-31 16:53:27,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:27,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:27,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:27,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670190570] [2024-01-31 16:53:27,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670190570] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:27,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:27,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:27,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880085936] [2024-01-31 16:53:27,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:27,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:27,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:27,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:27,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:27,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:27,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 213 transitions, 3840 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:27,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:27,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:27,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:28,020 INFO L124 PetriNetUnfolderBase]: 1686/2927 cut-off events. [2024-01-31 16:53:28,021 INFO L125 PetriNetUnfolderBase]: For 30428/30428 co-relation queries the response was YES. [2024-01-31 16:53:28,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17907 conditions, 2927 events. 1686/2927 cut-off events. For 30428/30428 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 16613 event pairs, 827 based on Foata normal form. 8/2935 useless extension candidates. Maximal degree in co-relation 17833. Up to 2434 conditions per place. [2024-01-31 16:53:28,045 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 166 selfloop transitions, 70 changer transitions 7/244 dead transitions. [2024-01-31 16:53:28,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 244 transitions, 4519 flow [2024-01-31 16:53:28,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:53:28,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:53:28,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 103 transitions. [2024-01-31 16:53:28,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29428571428571426 [2024-01-31 16:53:28,046 INFO L175 Difference]: Start difference. First operand has 216 places, 213 transitions, 3840 flow. Second operand 10 states and 103 transitions. [2024-01-31 16:53:28,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 244 transitions, 4519 flow [2024-01-31 16:53:28,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 244 transitions, 4454 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-01-31 16:53:28,154 INFO L231 Difference]: Finished difference. Result has 221 places, 212 transitions, 3894 flow [2024-01-31 16:53:28,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3776, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3894, PETRI_PLACES=221, PETRI_TRANSITIONS=212} [2024-01-31 16:53:28,155 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 190 predicate places. [2024-01-31 16:53:28,155 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 212 transitions, 3894 flow [2024-01-31 16:53:28,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:28,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:28,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:28,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-01-31 16:53:28,156 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:28,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:28,156 INFO L85 PathProgramCache]: Analyzing trace with hash 457833270, now seen corresponding path program 5 times [2024-01-31 16:53:28,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:28,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237801510] [2024-01-31 16:53:28,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:28,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:28,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:28,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:28,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:28,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237801510] [2024-01-31 16:53:28,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237801510] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:28,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:28,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:28,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544542934] [2024-01-31 16:53:28,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:28,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:28,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:28,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:28,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:28,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:28,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 212 transitions, 3894 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:28,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:28,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:28,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:28,856 INFO L124 PetriNetUnfolderBase]: 1545/2633 cut-off events. [2024-01-31 16:53:28,857 INFO L125 PetriNetUnfolderBase]: For 28428/28428 co-relation queries the response was YES. [2024-01-31 16:53:28,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16792 conditions, 2633 events. 1545/2633 cut-off events. For 28428/28428 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 14223 event pairs, 729 based on Foata normal form. 6/2639 useless extension candidates. Maximal degree in co-relation 16716. Up to 2156 conditions per place. [2024-01-31 16:53:28,874 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 162 selfloop transitions, 66 changer transitions 5/234 dead transitions. [2024-01-31 16:53:28,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 234 transitions, 4405 flow [2024-01-31 16:53:28,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:53:28,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:53:28,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2024-01-31 16:53:28,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28285714285714286 [2024-01-31 16:53:28,875 INFO L175 Difference]: Start difference. First operand has 221 places, 212 transitions, 3894 flow. Second operand 10 states and 99 transitions. [2024-01-31 16:53:28,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 234 transitions, 4405 flow [2024-01-31 16:53:28,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 234 transitions, 4259 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-01-31 16:53:28,969 INFO L231 Difference]: Finished difference. Result has 216 places, 204 transitions, 3693 flow [2024-01-31 16:53:28,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3624, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3693, PETRI_PLACES=216, PETRI_TRANSITIONS=204} [2024-01-31 16:53:28,970 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 185 predicate places. [2024-01-31 16:53:28,970 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 204 transitions, 3693 flow [2024-01-31 16:53:28,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:28,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:28,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:28,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-01-31 16:53:28,971 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:28,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:28,971 INFO L85 PathProgramCache]: Analyzing trace with hash -810421638, now seen corresponding path program 7 times [2024-01-31 16:53:28,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:28,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354124186] [2024-01-31 16:53:28,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:28,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:28,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:29,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:29,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:29,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354124186] [2024-01-31 16:53:29,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354124186] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:29,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:29,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:29,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480418560] [2024-01-31 16:53:29,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:29,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:29,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:29,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:29,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:29,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:29,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 204 transitions, 3693 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:29,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:29,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:29,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:29,679 INFO L124 PetriNetUnfolderBase]: 1552/2650 cut-off events. [2024-01-31 16:53:29,679 INFO L125 PetriNetUnfolderBase]: For 28032/28032 co-relation queries the response was YES. [2024-01-31 16:53:29,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16779 conditions, 2650 events. 1552/2650 cut-off events. For 28032/28032 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 14419 event pairs, 717 based on Foata normal form. 8/2658 useless extension candidates. Maximal degree in co-relation 16706. Up to 2156 conditions per place. [2024-01-31 16:53:29,701 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 162 selfloop transitions, 64 changer transitions 15/242 dead transitions. [2024-01-31 16:53:29,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 242 transitions, 4420 flow [2024-01-31 16:53:29,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:53:29,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:53:29,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 109 transitions. [2024-01-31 16:53:29,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2831168831168831 [2024-01-31 16:53:29,702 INFO L175 Difference]: Start difference. First operand has 216 places, 204 transitions, 3693 flow. Second operand 11 states and 109 transitions. [2024-01-31 16:53:29,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 242 transitions, 4420 flow [2024-01-31 16:53:29,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 242 transitions, 4240 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-01-31 16:53:29,804 INFO L231 Difference]: Finished difference. Result has 218 places, 203 transitions, 3630 flow [2024-01-31 16:53:29,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3517, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3630, PETRI_PLACES=218, PETRI_TRANSITIONS=203} [2024-01-31 16:53:29,805 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 187 predicate places. [2024-01-31 16:53:29,805 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 203 transitions, 3630 flow [2024-01-31 16:53:29,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:29,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:29,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:29,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-01-31 16:53:29,806 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:29,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:29,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1292380648, now seen corresponding path program 6 times [2024-01-31 16:53:29,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:29,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218199227] [2024-01-31 16:53:29,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:29,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:29,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:29,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:29,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218199227] [2024-01-31 16:53:29,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218199227] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:29,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938613272] [2024-01-31 16:53:29,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:53:29,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:29,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:29,995 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:30,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-01-31 16:53:30,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 16:53:30,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:30,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:53:30,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:30,176 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-31 16:53:30,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-01-31 16:53:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:30,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:30,253 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-31 16:53:30,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-01-31 16:53:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:30,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938613272] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:30,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:30,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2024-01-31 16:53:30,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613181137] [2024-01-31 16:53:30,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:30,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 16:53:30,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:30,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 16:53:30,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-01-31 16:53:30,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:30,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 203 transitions, 3630 flow. Second operand has 16 states, 16 states have (on average 5.9375) internal successors, (95), 16 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:30,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:30,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:30,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:30,881 INFO L124 PetriNetUnfolderBase]: 1738/2940 cut-off events. [2024-01-31 16:53:30,881 INFO L125 PetriNetUnfolderBase]: For 37800/37800 co-relation queries the response was YES. [2024-01-31 16:53:30,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19179 conditions, 2940 events. 1738/2940 cut-off events. For 37800/37800 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16159 event pairs, 725 based on Foata normal form. 30/2970 useless extension candidates. Maximal degree in co-relation 19102. Up to 2238 conditions per place. [2024-01-31 16:53:30,905 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 187 selfloop transitions, 67 changer transitions 0/255 dead transitions. [2024-01-31 16:53:30,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 255 transitions, 4720 flow [2024-01-31 16:53:30,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:53:30,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:53:30,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-01-31 16:53:30,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32 [2024-01-31 16:53:30,906 INFO L175 Difference]: Start difference. First operand has 218 places, 203 transitions, 3630 flow. Second operand 10 states and 112 transitions. [2024-01-31 16:53:30,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 255 transitions, 4720 flow [2024-01-31 16:53:31,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 255 transitions, 4584 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-01-31 16:53:31,019 INFO L231 Difference]: Finished difference. Result has 215 places, 210 transitions, 3801 flow [2024-01-31 16:53:31,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3494, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3801, PETRI_PLACES=215, PETRI_TRANSITIONS=210} [2024-01-31 16:53:31,021 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 184 predicate places. [2024-01-31 16:53:31,022 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 210 transitions, 3801 flow [2024-01-31 16:53:31,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.9375) internal successors, (95), 16 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:31,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:31,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:31,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:31,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:31,234 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:31,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:31,234 INFO L85 PathProgramCache]: Analyzing trace with hash -2045650958, now seen corresponding path program 7 times [2024-01-31 16:53:31,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:31,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154459919] [2024-01-31 16:53:31,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:31,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:31,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:31,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154459919] [2024-01-31 16:53:31,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154459919] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:31,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:31,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:31,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975733721] [2024-01-31 16:53:31,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:31,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:31,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:31,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:31,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:31,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:31,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 210 transitions, 3801 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:31,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:31,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:31,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:31,891 INFO L124 PetriNetUnfolderBase]: 1739/2947 cut-off events. [2024-01-31 16:53:31,891 INFO L125 PetriNetUnfolderBase]: For 38539/38539 co-relation queries the response was YES. [2024-01-31 16:53:31,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19540 conditions, 2947 events. 1739/2947 cut-off events. For 38539/38539 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16254 event pairs, 819 based on Foata normal form. 6/2953 useless extension candidates. Maximal degree in co-relation 19465. Up to 2474 conditions per place. [2024-01-31 16:53:31,914 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 161 selfloop transitions, 61 changer transitions 5/228 dead transitions. [2024-01-31 16:53:31,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 228 transitions, 4358 flow [2024-01-31 16:53:31,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:53:31,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:53:31,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2024-01-31 16:53:31,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28285714285714286 [2024-01-31 16:53:31,915 INFO L175 Difference]: Start difference. First operand has 215 places, 210 transitions, 3801 flow. Second operand 10 states and 99 transitions. [2024-01-31 16:53:31,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 228 transitions, 4358 flow [2024-01-31 16:53:32,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 228 transitions, 4230 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-01-31 16:53:32,033 INFO L231 Difference]: Finished difference. Result has 218 places, 209 transitions, 3768 flow [2024-01-31 16:53:32,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3675, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3768, PETRI_PLACES=218, PETRI_TRANSITIONS=209} [2024-01-31 16:53:32,034 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 187 predicate places. [2024-01-31 16:53:32,034 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 209 transitions, 3768 flow [2024-01-31 16:53:32,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:32,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:32,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:32,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-01-31 16:53:32,035 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:32,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:32,035 INFO L85 PathProgramCache]: Analyzing trace with hash -807086926, now seen corresponding path program 8 times [2024-01-31 16:53:32,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:32,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351573153] [2024-01-31 16:53:32,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:32,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:32,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:32,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:32,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:32,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351573153] [2024-01-31 16:53:32,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351573153] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:32,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008035373] [2024-01-31 16:53:32,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:53:32,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:32,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:32,207 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:32,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-01-31 16:53:32,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:53:32,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:32,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:53:32,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:32,386 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:53:32,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-01-31 16:53:32,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:32,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:32,448 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-31 16:53:32,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-01-31 16:53:32,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:32,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008035373] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:32,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:53:32,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 17 [2024-01-31 16:53:32,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660303739] [2024-01-31 16:53:32,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:32,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:53:32,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:32,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:53:32,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:53:32,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:32,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 209 transitions, 3768 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:32,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:32,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:32,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:33,032 INFO L124 PetriNetUnfolderBase]: 1778/3010 cut-off events. [2024-01-31 16:53:33,032 INFO L125 PetriNetUnfolderBase]: For 39126/39126 co-relation queries the response was YES. [2024-01-31 16:53:33,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19772 conditions, 3010 events. 1778/3010 cut-off events. For 39126/39126 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 16704 event pairs, 815 based on Foata normal form. 30/3040 useless extension candidates. Maximal degree in co-relation 19697. Up to 2509 conditions per place. [2024-01-31 16:53:33,057 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 177 selfloop transitions, 60 changer transitions 0/238 dead transitions. [2024-01-31 16:53:33,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 238 transitions, 4457 flow [2024-01-31 16:53:33,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:53:33,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:53:33,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-01-31 16:53:33,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-01-31 16:53:33,059 INFO L175 Difference]: Start difference. First operand has 218 places, 209 transitions, 3768 flow. Second operand 8 states and 100 transitions. [2024-01-31 16:53:33,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 238 transitions, 4457 flow [2024-01-31 16:53:33,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 238 transitions, 4335 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-01-31 16:53:33,189 INFO L231 Difference]: Finished difference. Result has 217 places, 211 transitions, 3821 flow [2024-01-31 16:53:33,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3646, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3821, PETRI_PLACES=217, PETRI_TRANSITIONS=211} [2024-01-31 16:53:33,189 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 186 predicate places. [2024-01-31 16:53:33,190 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 211 transitions, 3821 flow [2024-01-31 16:53:33,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:33,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:33,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:33,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:33,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:33,402 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:33,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:33,403 INFO L85 PathProgramCache]: Analyzing trace with hash 890158018, now seen corresponding path program 9 times [2024-01-31 16:53:33,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:33,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151104656] [2024-01-31 16:53:33,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:33,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:33,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:33,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151104656] [2024-01-31 16:53:33,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151104656] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:33,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735009547] [2024-01-31 16:53:33,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:53:33,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:33,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:33,588 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:33,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-01-31 16:53:33,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:53:33,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:33,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:53:33,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:33,802 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:53:33,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-01-31 16:53:33,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:33,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:33,881 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-31 16:53:33,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-01-31 16:53:33,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:33,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735009547] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:33,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:33,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-01-31 16:53:33,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603368336] [2024-01-31 16:53:33,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:33,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 16:53:33,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:33,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 16:53:33,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:53:33,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:33,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 211 transitions, 3821 flow. Second operand has 17 states, 17 states have (on average 5.764705882352941) internal successors, (98), 17 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:33,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:33,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:33,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:34,608 INFO L124 PetriNetUnfolderBase]: 1802/3103 cut-off events. [2024-01-31 16:53:34,608 INFO L125 PetriNetUnfolderBase]: For 38064/38064 co-relation queries the response was YES. [2024-01-31 16:53:34,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19740 conditions, 3103 events. 1802/3103 cut-off events. For 38064/38064 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17645 event pairs, 763 based on Foata normal form. 30/3132 useless extension candidates. Maximal degree in co-relation 19664. Up to 2344 conditions per place. [2024-01-31 16:53:34,635 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 210 selfloop transitions, 78 changer transitions 0/289 dead transitions. [2024-01-31 16:53:34,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 289 transitions, 5027 flow [2024-01-31 16:53:34,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 16:53:34,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 16:53:34,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 166 transitions. [2024-01-31 16:53:34,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29642857142857143 [2024-01-31 16:53:34,636 INFO L175 Difference]: Start difference. First operand has 217 places, 211 transitions, 3821 flow. Second operand 16 states and 166 transitions. [2024-01-31 16:53:34,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 289 transitions, 5027 flow [2024-01-31 16:53:34,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 289 transitions, 4868 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-01-31 16:53:34,758 INFO L231 Difference]: Finished difference. Result has 230 places, 224 transitions, 4085 flow [2024-01-31 16:53:34,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3684, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4085, PETRI_PLACES=230, PETRI_TRANSITIONS=224} [2024-01-31 16:53:34,759 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 199 predicate places. [2024-01-31 16:53:34,759 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 224 transitions, 4085 flow [2024-01-31 16:53:34,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.764705882352941) internal successors, (98), 17 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:34,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:34,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:34,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-01-31 16:53:34,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-01-31 16:53:34,963 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:34,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:34,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1464135894, now seen corresponding path program 8 times [2024-01-31 16:53:34,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:34,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436551755] [2024-01-31 16:53:34,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:34,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:34,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:35,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:35,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:35,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436551755] [2024-01-31 16:53:35,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436551755] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:35,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:35,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:35,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343780586] [2024-01-31 16:53:35,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:35,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:35,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:35,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:35,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:35,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:35,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 224 transitions, 4085 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:35,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:35,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:35,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:35,633 INFO L124 PetriNetUnfolderBase]: 1803/3112 cut-off events. [2024-01-31 16:53:35,634 INFO L125 PetriNetUnfolderBase]: For 36269/36269 co-relation queries the response was YES. [2024-01-31 16:53:35,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19955 conditions, 3112 events. 1803/3112 cut-off events. For 36269/36269 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 17854 event pairs, 855 based on Foata normal form. 8/3120 useless extension candidates. Maximal degree in co-relation 19875. Up to 2636 conditions per place. [2024-01-31 16:53:35,661 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 176 selfloop transitions, 60 changer transitions 7/244 dead transitions. [2024-01-31 16:53:35,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 244 transitions, 4674 flow [2024-01-31 16:53:35,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:53:35,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:53:35,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 100 transitions. [2024-01-31 16:53:35,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2857142857142857 [2024-01-31 16:53:35,663 INFO L175 Difference]: Start difference. First operand has 230 places, 224 transitions, 4085 flow. Second operand 10 states and 100 transitions. [2024-01-31 16:53:35,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 244 transitions, 4674 flow [2024-01-31 16:53:35,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 244 transitions, 4587 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-01-31 16:53:35,794 INFO L231 Difference]: Finished difference. Result has 232 places, 223 transitions, 4088 flow [2024-01-31 16:53:35,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3999, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4088, PETRI_PLACES=232, PETRI_TRANSITIONS=223} [2024-01-31 16:53:35,794 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 201 predicate places. [2024-01-31 16:53:35,795 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 223 transitions, 4088 flow [2024-01-31 16:53:35,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:35,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:35,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:35,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-01-31 16:53:35,795 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:35,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:35,796 INFO L85 PathProgramCache]: Analyzing trace with hash 619648326, now seen corresponding path program 10 times [2024-01-31 16:53:35,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:35,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525266967] [2024-01-31 16:53:35,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:35,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:35,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:35,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:35,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525266967] [2024-01-31 16:53:35,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525266967] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:35,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:35,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:35,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620341405] [2024-01-31 16:53:35,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:35,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:35,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:35,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:35,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:35,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:35,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 223 transitions, 4088 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:35,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:35,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:35,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:36,580 INFO L124 PetriNetUnfolderBase]: 1698/2900 cut-off events. [2024-01-31 16:53:36,581 INFO L125 PetriNetUnfolderBase]: For 34505/34505 co-relation queries the response was YES. [2024-01-31 16:53:36,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18973 conditions, 2900 events. 1698/2900 cut-off events. For 34505/34505 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 16132 event pairs, 783 based on Foata normal form. 6/2906 useless extension candidates. Maximal degree in co-relation 18892. Up to 2438 conditions per place. [2024-01-31 16:53:36,605 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 173 selfloop transitions, 56 changer transitions 5/235 dead transitions. [2024-01-31 16:53:36,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 235 transitions, 4515 flow [2024-01-31 16:53:36,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:53:36,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:53:36,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 96 transitions. [2024-01-31 16:53:36,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2742857142857143 [2024-01-31 16:53:36,606 INFO L175 Difference]: Start difference. First operand has 232 places, 223 transitions, 4088 flow. Second operand 10 states and 96 transitions. [2024-01-31 16:53:36,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 235 transitions, 4515 flow [2024-01-31 16:53:36,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 235 transitions, 4390 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-01-31 16:53:36,728 INFO L231 Difference]: Finished difference. Result has 229 places, 216 transitions, 3902 flow [2024-01-31 16:53:36,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3845, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3902, PETRI_PLACES=229, PETRI_TRANSITIONS=216} [2024-01-31 16:53:36,729 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 198 predicate places. [2024-01-31 16:53:36,729 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 216 transitions, 3902 flow [2024-01-31 16:53:36,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:36,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:36,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:36,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-01-31 16:53:36,730 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:36,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:36,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1190985456, now seen corresponding path program 9 times [2024-01-31 16:53:36,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:36,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198900299] [2024-01-31 16:53:36,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:36,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:36,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:36,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198900299] [2024-01-31 16:53:36,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198900299] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:36,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:36,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:36,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036636262] [2024-01-31 16:53:36,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:36,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:36,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:36,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:36,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:36,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:36,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 216 transitions, 3902 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:36,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:36,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:36,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:37,422 INFO L124 PetriNetUnfolderBase]: 1687/2883 cut-off events. [2024-01-31 16:53:37,423 INFO L125 PetriNetUnfolderBase]: For 33842/33842 co-relation queries the response was YES. [2024-01-31 16:53:37,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18748 conditions, 2883 events. 1687/2883 cut-off events. For 33842/33842 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15977 event pairs, 785 based on Foata normal form. 8/2891 useless extension candidates. Maximal degree in co-relation 18668. Up to 2424 conditions per place. [2024-01-31 16:53:37,448 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 172 selfloop transitions, 53 changer transitions 7/233 dead transitions. [2024-01-31 16:53:37,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 233 transitions, 4403 flow [2024-01-31 16:53:37,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:53:37,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:53:37,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 97 transitions. [2024-01-31 16:53:37,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27714285714285714 [2024-01-31 16:53:37,449 INFO L175 Difference]: Start difference. First operand has 229 places, 216 transitions, 3902 flow. Second operand 10 states and 97 transitions. [2024-01-31 16:53:37,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 233 transitions, 4403 flow [2024-01-31 16:53:37,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 233 transitions, 4274 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-01-31 16:53:37,601 INFO L231 Difference]: Finished difference. Result has 225 places, 212 transitions, 3786 flow [2024-01-31 16:53:37,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3728, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3786, PETRI_PLACES=225, PETRI_TRANSITIONS=212} [2024-01-31 16:53:37,601 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 194 predicate places. [2024-01-31 16:53:37,601 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 212 transitions, 3786 flow [2024-01-31 16:53:37,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:37,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:37,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:37,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-01-31 16:53:37,602 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:37,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:37,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1616660922, now seen corresponding path program 10 times [2024-01-31 16:53:37,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:37,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985070] [2024-01-31 16:53:37,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:37,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:37,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:37,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:37,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985070] [2024-01-31 16:53:37,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985070] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:37,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:37,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:37,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642694426] [2024-01-31 16:53:37,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:37,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:37,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:37,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:37,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:37,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:37,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 212 transitions, 3786 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:37,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:37,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:37,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:38,255 INFO L124 PetriNetUnfolderBase]: 1656/2832 cut-off events. [2024-01-31 16:53:38,256 INFO L125 PetriNetUnfolderBase]: For 32503/32503 co-relation queries the response was YES. [2024-01-31 16:53:38,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18246 conditions, 2832 events. 1656/2832 cut-off events. For 32503/32503 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15682 event pairs, 763 based on Foata normal form. 8/2840 useless extension candidates. Maximal degree in co-relation 18168. Up to 2384 conditions per place. [2024-01-31 16:53:38,278 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 169 selfloop transitions, 47 changer transitions 15/232 dead transitions. [2024-01-31 16:53:38,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 232 transitions, 4270 flow [2024-01-31 16:53:38,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:53:38,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:53:38,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 103 transitions. [2024-01-31 16:53:38,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2675324675324675 [2024-01-31 16:53:38,279 INFO L175 Difference]: Start difference. First operand has 225 places, 212 transitions, 3786 flow. Second operand 11 states and 103 transitions. [2024-01-31 16:53:38,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 232 transitions, 4270 flow [2024-01-31 16:53:38,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 232 transitions, 4094 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-01-31 16:53:38,386 INFO L231 Difference]: Finished difference. Result has 220 places, 204 transitions, 3547 flow [2024-01-31 16:53:38,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3541, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3547, PETRI_PLACES=220, PETRI_TRANSITIONS=204} [2024-01-31 16:53:38,387 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 189 predicate places. [2024-01-31 16:53:38,387 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 204 transitions, 3547 flow [2024-01-31 16:53:38,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:38,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:38,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:38,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-01-31 16:53:38,388 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:38,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:38,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1800376156, now seen corresponding path program 11 times [2024-01-31 16:53:38,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:38,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045272595] [2024-01-31 16:53:38,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:38,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:38,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:38,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:38,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:38,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045272595] [2024-01-31 16:53:38,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045272595] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:38,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:38,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:38,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018215211] [2024-01-31 16:53:38,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:38,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:38,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:38,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:38,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:38,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:38,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 204 transitions, 3547 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:38,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:38,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:38,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:39,162 INFO L124 PetriNetUnfolderBase]: 1684/2868 cut-off events. [2024-01-31 16:53:39,162 INFO L125 PetriNetUnfolderBase]: For 30582/30582 co-relation queries the response was YES. [2024-01-31 16:53:39,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18502 conditions, 2868 events. 1684/2868 cut-off events. For 30582/30582 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15825 event pairs, 247 based on Foata normal form. 12/2880 useless extension candidates. Maximal degree in co-relation 18426. Up to 1446 conditions per place. [2024-01-31 16:53:39,181 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 183 selfloop transitions, 90 changer transitions 2/276 dead transitions. [2024-01-31 16:53:39,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 276 transitions, 4799 flow [2024-01-31 16:53:39,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:53:39,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:53:39,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-01-31 16:53:39,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3342857142857143 [2024-01-31 16:53:39,183 INFO L175 Difference]: Start difference. First operand has 220 places, 204 transitions, 3547 flow. Second operand 10 states and 117 transitions. [2024-01-31 16:53:39,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 276 transitions, 4799 flow [2024-01-31 16:53:39,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 276 transitions, 4623 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-01-31 16:53:39,287 INFO L231 Difference]: Finished difference. Result has 212 places, 207 transitions, 3657 flow [2024-01-31 16:53:39,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3386, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3657, PETRI_PLACES=212, PETRI_TRANSITIONS=207} [2024-01-31 16:53:39,295 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 181 predicate places. [2024-01-31 16:53:39,295 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 207 transitions, 3657 flow [2024-01-31 16:53:39,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:39,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:39,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:39,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-01-31 16:53:39,296 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:39,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:39,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1233583320, now seen corresponding path program 11 times [2024-01-31 16:53:39,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:39,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041185174] [2024-01-31 16:53:39,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:39,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:39,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:39,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:39,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041185174] [2024-01-31 16:53:39,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041185174] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:39,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:39,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:39,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023193837] [2024-01-31 16:53:39,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:39,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:39,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:39,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:39,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:39,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:39,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 207 transitions, 3657 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:39,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:39,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:39,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:39,951 INFO L124 PetriNetUnfolderBase]: 1685/2875 cut-off events. [2024-01-31 16:53:39,951 INFO L125 PetriNetUnfolderBase]: For 31266/31266 co-relation queries the response was YES. [2024-01-31 16:53:39,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18698 conditions, 2875 events. 1685/2875 cut-off events. For 31266/31266 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15872 event pairs, 647 based on Foata normal form. 6/2881 useless extension candidates. Maximal degree in co-relation 18623. Up to 1994 conditions per place. [2024-01-31 16:53:39,974 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 150 selfloop transitions, 87 changer transitions 8/246 dead transitions. [2024-01-31 16:53:39,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 246 transitions, 4437 flow [2024-01-31 16:53:39,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:53:39,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:53:39,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 109 transitions. [2024-01-31 16:53:39,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2831168831168831 [2024-01-31 16:53:39,975 INFO L175 Difference]: Start difference. First operand has 212 places, 207 transitions, 3657 flow. Second operand 11 states and 109 transitions. [2024-01-31 16:53:39,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 246 transitions, 4437 flow [2024-01-31 16:53:40,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 246 transitions, 4200 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-01-31 16:53:40,076 INFO L231 Difference]: Finished difference. Result has 214 places, 205 transitions, 3566 flow [2024-01-31 16:53:40,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3423, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3566, PETRI_PLACES=214, PETRI_TRANSITIONS=205} [2024-01-31 16:53:40,076 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 183 predicate places. [2024-01-31 16:53:40,076 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 205 transitions, 3566 flow [2024-01-31 16:53:40,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:40,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:40,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:40,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-01-31 16:53:40,077 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:40,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:40,077 INFO L85 PathProgramCache]: Analyzing trace with hash 246858088, now seen corresponding path program 12 times [2024-01-31 16:53:40,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:40,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275896746] [2024-01-31 16:53:40,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:40,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:40,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:40,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:40,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275896746] [2024-01-31 16:53:40,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275896746] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:40,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:40,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:40,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765630767] [2024-01-31 16:53:40,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:40,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:40,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:40,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:40,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:40,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:40,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 205 transitions, 3566 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:40,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:40,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:40,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:40,770 INFO L124 PetriNetUnfolderBase]: 1767/2993 cut-off events. [2024-01-31 16:53:40,770 INFO L125 PetriNetUnfolderBase]: For 32359/32359 co-relation queries the response was YES. [2024-01-31 16:53:40,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19682 conditions, 2993 events. 1767/2993 cut-off events. For 32359/32359 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 16575 event pairs, 653 based on Foata normal form. 12/3005 useless extension candidates. Maximal degree in co-relation 19608. Up to 2030 conditions per place. [2024-01-31 16:53:40,793 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 172 selfloop transitions, 91 changer transitions 0/264 dead transitions. [2024-01-31 16:53:40,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 264 transitions, 4745 flow [2024-01-31 16:53:40,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:53:40,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:53:40,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-01-31 16:53:40,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.346031746031746 [2024-01-31 16:53:40,794 INFO L175 Difference]: Start difference. First operand has 214 places, 205 transitions, 3566 flow. Second operand 9 states and 109 transitions. [2024-01-31 16:53:40,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 264 transitions, 4745 flow [2024-01-31 16:53:40,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 264 transitions, 4560 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-01-31 16:53:40,902 INFO L231 Difference]: Finished difference. Result has 212 places, 211 transitions, 3749 flow [2024-01-31 16:53:40,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3383, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3749, PETRI_PLACES=212, PETRI_TRANSITIONS=211} [2024-01-31 16:53:40,902 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 181 predicate places. [2024-01-31 16:53:40,902 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 211 transitions, 3749 flow [2024-01-31 16:53:40,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:40,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:40,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:40,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-01-31 16:53:40,903 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:40,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:40,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1590590228, now seen corresponding path program 13 times [2024-01-31 16:53:40,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:40,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916540560] [2024-01-31 16:53:40,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:40,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:40,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:41,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:41,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916540560] [2024-01-31 16:53:41,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916540560] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:41,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:41,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:41,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074692342] [2024-01-31 16:53:41,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:41,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:41,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:41,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:41,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:41,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:41,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 211 transitions, 3749 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:41,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:41,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:41,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:41,581 INFO L124 PetriNetUnfolderBase]: 1787/3025 cut-off events. [2024-01-31 16:53:41,582 INFO L125 PetriNetUnfolderBase]: For 36016/36016 co-relation queries the response was YES. [2024-01-31 16:53:41,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20150 conditions, 3025 events. 1787/3025 cut-off events. For 36016/36016 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 16782 event pairs, 681 based on Foata normal form. 12/3037 useless extension candidates. Maximal degree in co-relation 20076. Up to 2060 conditions per place. [2024-01-31 16:53:41,606 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 178 selfloop transitions, 78 changer transitions 1/258 dead transitions. [2024-01-31 16:53:41,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 258 transitions, 4806 flow [2024-01-31 16:53:41,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:53:41,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:53:41,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-01-31 16:53:41,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3396825396825397 [2024-01-31 16:53:41,607 INFO L175 Difference]: Start difference. First operand has 212 places, 211 transitions, 3749 flow. Second operand 9 states and 107 transitions. [2024-01-31 16:53:41,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 258 transitions, 4806 flow [2024-01-31 16:53:41,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 258 transitions, 4640 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-01-31 16:53:41,713 INFO L231 Difference]: Finished difference. Result has 216 places, 215 transitions, 3874 flow [2024-01-31 16:53:41,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3588, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3874, PETRI_PLACES=216, PETRI_TRANSITIONS=215} [2024-01-31 16:53:41,714 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 185 predicate places. [2024-01-31 16:53:41,714 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 215 transitions, 3874 flow [2024-01-31 16:53:41,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:41,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:41,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:41,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-01-31 16:53:41,715 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:41,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:41,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1736595332, now seen corresponding path program 12 times [2024-01-31 16:53:41,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:41,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976109815] [2024-01-31 16:53:41,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:41,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:41,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:41,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976109815] [2024-01-31 16:53:41,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976109815] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:41,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:41,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:41,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878669995] [2024-01-31 16:53:41,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:41,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:41,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:41,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:41,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:41,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:41,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 215 transitions, 3874 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:41,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:41,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:41,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:42,496 INFO L124 PetriNetUnfolderBase]: 1763/2985 cut-off events. [2024-01-31 16:53:42,497 INFO L125 PetriNetUnfolderBase]: For 33820/33820 co-relation queries the response was YES. [2024-01-31 16:53:42,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19960 conditions, 2985 events. 1763/2985 cut-off events. For 33820/33820 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16615 event pairs, 593 based on Foata normal form. 10/2995 useless extension candidates. Maximal degree in co-relation 19885. Up to 1906 conditions per place. [2024-01-31 16:53:42,521 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 173 selfloop transitions, 79 changer transitions 16/269 dead transitions. [2024-01-31 16:53:42,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 269 transitions, 4723 flow [2024-01-31 16:53:42,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:53:42,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:53:42,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 128 transitions. [2024-01-31 16:53:42,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3047619047619048 [2024-01-31 16:53:42,522 INFO L175 Difference]: Start difference. First operand has 216 places, 215 transitions, 3874 flow. Second operand 12 states and 128 transitions. [2024-01-31 16:53:42,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 269 transitions, 4723 flow [2024-01-31 16:53:42,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 269 transitions, 4595 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-01-31 16:53:42,631 INFO L231 Difference]: Finished difference. Result has 223 places, 205 transitions, 3705 flow [2024-01-31 16:53:42,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3664, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3705, PETRI_PLACES=223, PETRI_TRANSITIONS=205} [2024-01-31 16:53:42,632 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 192 predicate places. [2024-01-31 16:53:42,632 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 205 transitions, 3705 flow [2024-01-31 16:53:42,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:42,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:42,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:42,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-01-31 16:53:42,633 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:42,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:42,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1049767982, now seen corresponding path program 14 times [2024-01-31 16:53:42,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:42,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109413495] [2024-01-31 16:53:42,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:42,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:42,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:42,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109413495] [2024-01-31 16:53:42,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109413495] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:42,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:42,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:42,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907608101] [2024-01-31 16:53:42,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:42,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:42,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:42,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:42,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:42,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:42,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 205 transitions, 3705 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:42,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:42,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:42,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:43,282 INFO L124 PetriNetUnfolderBase]: 1724/2920 cut-off events. [2024-01-31 16:53:43,282 INFO L125 PetriNetUnfolderBase]: For 32455/32455 co-relation queries the response was YES. [2024-01-31 16:53:43,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19714 conditions, 2920 events. 1724/2920 cut-off events. For 32455/32455 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 16061 event pairs, 653 based on Foata normal form. 12/2932 useless extension candidates. Maximal degree in co-relation 19638. Up to 2058 conditions per place. [2024-01-31 16:53:43,307 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 156 selfloop transitions, 86 changer transitions 0/243 dead transitions. [2024-01-31 16:53:43,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 243 transitions, 4486 flow [2024-01-31 16:53:43,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:53:43,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:53:43,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-01-31 16:53:43,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31746031746031744 [2024-01-31 16:53:43,308 INFO L175 Difference]: Start difference. First operand has 223 places, 205 transitions, 3705 flow. Second operand 9 states and 100 transitions. [2024-01-31 16:53:43,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 243 transitions, 4486 flow [2024-01-31 16:53:43,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 243 transitions, 4302 flow, removed 15 selfloop flow, removed 11 redundant places. [2024-01-31 16:53:43,406 INFO L231 Difference]: Finished difference. Result has 213 places, 206 transitions, 3719 flow [2024-01-31 16:53:43,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3521, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3719, PETRI_PLACES=213, PETRI_TRANSITIONS=206} [2024-01-31 16:53:43,406 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 182 predicate places. [2024-01-31 16:53:43,406 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 206 transitions, 3719 flow [2024-01-31 16:53:43,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:43,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:43,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:43,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-01-31 16:53:43,407 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:43,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:43,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1717651836, now seen corresponding path program 13 times [2024-01-31 16:53:43,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:43,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367345580] [2024-01-31 16:53:43,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:43,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:43,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:43,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367345580] [2024-01-31 16:53:43,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367345580] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:43,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:43,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:43,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529709596] [2024-01-31 16:53:43,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:43,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:43,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:43,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:43,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:43,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:43,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 206 transitions, 3719 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:43,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:43,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:43,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:44,098 INFO L124 PetriNetUnfolderBase]: 1725/2927 cut-off events. [2024-01-31 16:53:44,098 INFO L125 PetriNetUnfolderBase]: For 32515/32515 co-relation queries the response was YES. [2024-01-31 16:53:44,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19727 conditions, 2927 events. 1725/2927 cut-off events. For 32515/32515 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16146 event pairs, 657 based on Foata normal form. 6/2933 useless extension candidates. Maximal degree in co-relation 19654. Up to 2064 conditions per place. [2024-01-31 16:53:44,122 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 156 selfloop transitions, 67 changer transitions 8/232 dead transitions. [2024-01-31 16:53:44,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 232 transitions, 4369 flow [2024-01-31 16:53:44,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:53:44,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:53:44,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 107 transitions. [2024-01-31 16:53:44,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2779220779220779 [2024-01-31 16:53:44,123 INFO L175 Difference]: Start difference. First operand has 213 places, 206 transitions, 3719 flow. Second operand 11 states and 107 transitions. [2024-01-31 16:53:44,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 232 transitions, 4369 flow [2024-01-31 16:53:44,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 232 transitions, 4203 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-31 16:53:44,214 INFO L231 Difference]: Finished difference. Result has 218 places, 203 transitions, 3640 flow [2024-01-31 16:53:44,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3555, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3640, PETRI_PLACES=218, PETRI_TRANSITIONS=203} [2024-01-31 16:53:44,214 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 187 predicate places. [2024-01-31 16:53:44,214 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 203 transitions, 3640 flow [2024-01-31 16:53:44,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:44,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:44,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:44,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-01-31 16:53:44,215 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:44,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:44,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1991209102, now seen corresponding path program 15 times [2024-01-31 16:53:44,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:44,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886704439] [2024-01-31 16:53:44,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:44,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:44,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:44,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:44,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886704439] [2024-01-31 16:53:44,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886704439] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:44,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:44,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:44,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99104202] [2024-01-31 16:53:44,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:44,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:44,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:44,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:44,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:44,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:44,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 203 transitions, 3640 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:44,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:44,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:44,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:44,862 INFO L124 PetriNetUnfolderBase]: 1742/2946 cut-off events. [2024-01-31 16:53:44,863 INFO L125 PetriNetUnfolderBase]: For 32589/32589 co-relation queries the response was YES. [2024-01-31 16:53:44,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19870 conditions, 2946 events. 1742/2946 cut-off events. For 32589/32589 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16201 event pairs, 691 based on Foata normal form. 12/2958 useless extension candidates. Maximal degree in co-relation 19796. Up to 2082 conditions per place. [2024-01-31 16:53:44,887 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 160 selfloop transitions, 75 changer transitions 0/236 dead transitions. [2024-01-31 16:53:44,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 236 transitions, 4480 flow [2024-01-31 16:53:44,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:53:44,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:53:44,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-01-31 16:53:44,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30793650793650795 [2024-01-31 16:53:44,888 INFO L175 Difference]: Start difference. First operand has 218 places, 203 transitions, 3640 flow. Second operand 9 states and 97 transitions. [2024-01-31 16:53:44,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 236 transitions, 4480 flow [2024-01-31 16:53:44,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 236 transitions, 4325 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-01-31 16:53:44,978 INFO L231 Difference]: Finished difference. Result has 215 places, 210 transitions, 3844 flow [2024-01-31 16:53:44,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3494, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3844, PETRI_PLACES=215, PETRI_TRANSITIONS=210} [2024-01-31 16:53:44,979 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 184 predicate places. [2024-01-31 16:53:44,979 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 210 transitions, 3844 flow [2024-01-31 16:53:44,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:44,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:44,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:44,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-01-31 16:53:44,980 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:44,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:44,980 INFO L85 PathProgramCache]: Analyzing trace with hash 293964158, now seen corresponding path program 16 times [2024-01-31 16:53:44,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:44,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868278649] [2024-01-31 16:53:44,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:44,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:44,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:45,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:45,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:45,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868278649] [2024-01-31 16:53:45,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868278649] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:45,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:45,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:45,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109846241] [2024-01-31 16:53:45,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:45,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:45,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:45,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:45,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:45,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:45,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 210 transitions, 3844 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:45,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:45,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:45,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:45,635 INFO L124 PetriNetUnfolderBase]: 1730/2934 cut-off events. [2024-01-31 16:53:45,636 INFO L125 PetriNetUnfolderBase]: For 31993/31993 co-relation queries the response was YES. [2024-01-31 16:53:45,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19711 conditions, 2934 events. 1730/2934 cut-off events. For 31993/31993 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 16183 event pairs, 679 based on Foata normal form. 12/2946 useless extension candidates. Maximal degree in co-relation 19636. Up to 2070 conditions per place. [2024-01-31 16:53:45,659 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 159 selfloop transitions, 74 changer transitions 1/235 dead transitions. [2024-01-31 16:53:45,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 235 transitions, 4459 flow [2024-01-31 16:53:45,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:53:45,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:53:45,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-01-31 16:53:45,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32063492063492066 [2024-01-31 16:53:45,660 INFO L175 Difference]: Start difference. First operand has 215 places, 210 transitions, 3844 flow. Second operand 9 states and 101 transitions. [2024-01-31 16:53:45,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 235 transitions, 4459 flow [2024-01-31 16:53:45,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 235 transitions, 4301 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-01-31 16:53:45,749 INFO L231 Difference]: Finished difference. Result has 216 places, 208 transitions, 3763 flow [2024-01-31 16:53:45,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3621, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3763, PETRI_PLACES=216, PETRI_TRANSITIONS=208} [2024-01-31 16:53:45,750 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 185 predicate places. [2024-01-31 16:53:45,750 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 208 transitions, 3763 flow [2024-01-31 16:53:45,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:45,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:45,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:45,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-01-31 16:53:45,751 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:45,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:45,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1469275750, now seen corresponding path program 14 times [2024-01-31 16:53:45,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:45,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108552894] [2024-01-31 16:53:45,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:45,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:45,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:45,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108552894] [2024-01-31 16:53:45,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108552894] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:45,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:45,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:45,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916009883] [2024-01-31 16:53:45,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:45,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:45,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:45,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:45,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:45,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:45,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 208 transitions, 3763 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:45,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:45,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:45,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:46,430 INFO L124 PetriNetUnfolderBase]: 1766/2994 cut-off events. [2024-01-31 16:53:46,431 INFO L125 PetriNetUnfolderBase]: For 33577/33577 co-relation queries the response was YES. [2024-01-31 16:53:46,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20168 conditions, 2994 events. 1766/2994 cut-off events. For 33577/33577 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16602 event pairs, 677 based on Foata normal form. 30/3024 useless extension candidates. Maximal degree in co-relation 20095. Up to 2110 conditions per place. [2024-01-31 16:53:46,455 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 174 selfloop transitions, 77 changer transitions 2/254 dead transitions. [2024-01-31 16:53:46,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 254 transitions, 4753 flow [2024-01-31 16:53:46,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:53:46,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:53:46,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-01-31 16:53:46,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3396825396825397 [2024-01-31 16:53:46,457 INFO L175 Difference]: Start difference. First operand has 216 places, 208 transitions, 3763 flow. Second operand 9 states and 107 transitions. [2024-01-31 16:53:46,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 254 transitions, 4753 flow [2024-01-31 16:53:46,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 254 transitions, 4584 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-01-31 16:53:46,550 INFO L231 Difference]: Finished difference. Result has 213 places, 212 transitions, 3869 flow [2024-01-31 16:53:46,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3602, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3869, PETRI_PLACES=213, PETRI_TRANSITIONS=212} [2024-01-31 16:53:46,551 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 182 predicate places. [2024-01-31 16:53:46,551 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 212 transitions, 3869 flow [2024-01-31 16:53:46,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:46,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:46,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:46,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-01-31 16:53:46,552 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:46,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:46,552 INFO L85 PathProgramCache]: Analyzing trace with hash 610837332, now seen corresponding path program 15 times [2024-01-31 16:53:46,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:46,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668316482] [2024-01-31 16:53:46,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:46,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:46,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:46,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:46,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668316482] [2024-01-31 16:53:46,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668316482] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:46,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:46,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:46,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895158356] [2024-01-31 16:53:46,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:46,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:46,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:46,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:46,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:46,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:46,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 212 transitions, 3869 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:46,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:46,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:46,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:47,284 INFO L124 PetriNetUnfolderBase]: 1806/3060 cut-off events. [2024-01-31 16:53:47,284 INFO L125 PetriNetUnfolderBase]: For 36178/36178 co-relation queries the response was YES. [2024-01-31 16:53:47,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20886 conditions, 3060 events. 1806/3060 cut-off events. For 36178/36178 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17076 event pairs, 637 based on Foata normal form. 30/3090 useless extension candidates. Maximal degree in co-relation 20819. Up to 2134 conditions per place. [2024-01-31 16:53:47,310 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 161 selfloop transitions, 91 changer transitions 0/253 dead transitions. [2024-01-31 16:53:47,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 253 transitions, 4729 flow [2024-01-31 16:53:47,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:53:47,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:53:47,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-01-31 16:53:47,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3238095238095238 [2024-01-31 16:53:47,312 INFO L175 Difference]: Start difference. First operand has 213 places, 212 transitions, 3869 flow. Second operand 9 states and 102 transitions. [2024-01-31 16:53:47,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 253 transitions, 4729 flow [2024-01-31 16:53:47,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 253 transitions, 4569 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-01-31 16:53:47,427 INFO L231 Difference]: Finished difference. Result has 215 places, 214 transitions, 3945 flow [2024-01-31 16:53:47,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3721, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3945, PETRI_PLACES=215, PETRI_TRANSITIONS=214} [2024-01-31 16:53:47,428 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 184 predicate places. [2024-01-31 16:53:47,429 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 214 transitions, 3945 flow [2024-01-31 16:53:47,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:47,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:47,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:47,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-01-31 16:53:47,430 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:47,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:47,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1555161798, now seen corresponding path program 16 times [2024-01-31 16:53:47,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:47,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655693474] [2024-01-31 16:53:47,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:47,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:47,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:47,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655693474] [2024-01-31 16:53:47,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655693474] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:47,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:47,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:47,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952457035] [2024-01-31 16:53:47,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:47,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:47,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:47,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:47,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:47,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:47,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 214 transitions, 3945 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:47,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:47,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:47,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:48,183 INFO L124 PetriNetUnfolderBase]: 1800/3054 cut-off events. [2024-01-31 16:53:48,184 INFO L125 PetriNetUnfolderBase]: For 33335/33335 co-relation queries the response was YES. [2024-01-31 16:53:48,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20561 conditions, 3054 events. 1800/3054 cut-off events. For 33335/33335 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 17057 event pairs, 637 based on Foata normal form. 6/3060 useless extension candidates. Maximal degree in co-relation 20495. Up to 2124 conditions per place. [2024-01-31 16:53:48,214 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 148 selfloop transitions, 89 changer transitions 5/243 dead transitions. [2024-01-31 16:53:48,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 243 transitions, 4586 flow [2024-01-31 16:53:48,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:53:48,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:53:48,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 100 transitions. [2024-01-31 16:53:48,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2857142857142857 [2024-01-31 16:53:48,216 INFO L175 Difference]: Start difference. First operand has 215 places, 214 transitions, 3945 flow. Second operand 10 states and 100 transitions. [2024-01-31 16:53:48,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 243 transitions, 4586 flow [2024-01-31 16:53:48,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 243 transitions, 4474 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-01-31 16:53:48,339 INFO L231 Difference]: Finished difference. Result has 219 places, 210 transitions, 3915 flow [2024-01-31 16:53:48,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3778, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3915, PETRI_PLACES=219, PETRI_TRANSITIONS=210} [2024-01-31 16:53:48,340 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 188 predicate places. [2024-01-31 16:53:48,340 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 210 transitions, 3915 flow [2024-01-31 16:53:48,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:48,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:48,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:48,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-01-31 16:53:48,341 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:48,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:48,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1204205500, now seen corresponding path program 17 times [2024-01-31 16:53:48,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:48,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574404352] [2024-01-31 16:53:48,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:48,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:48,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:48,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:48,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574404352] [2024-01-31 16:53:48,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574404352] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:48,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:48,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:48,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589063187] [2024-01-31 16:53:48,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:48,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:48,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:48,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:48,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:48,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:48,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 210 transitions, 3915 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:48,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:48,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:48,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:49,100 INFO L124 PetriNetUnfolderBase]: 1769/3005 cut-off events. [2024-01-31 16:53:49,100 INFO L125 PetriNetUnfolderBase]: For 34541/34541 co-relation queries the response was YES. [2024-01-31 16:53:49,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20221 conditions, 3005 events. 1769/3005 cut-off events. For 34541/34541 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 16738 event pairs, 631 based on Foata normal form. 8/3013 useless extension candidates. Maximal degree in co-relation 20155. Up to 2084 conditions per place. [2024-01-31 16:53:49,126 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 147 selfloop transitions, 85 changer transitions 7/240 dead transitions. [2024-01-31 16:53:49,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 240 transitions, 4544 flow [2024-01-31 16:53:49,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:53:49,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:53:49,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 100 transitions. [2024-01-31 16:53:49,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2857142857142857 [2024-01-31 16:53:49,127 INFO L175 Difference]: Start difference. First operand has 219 places, 210 transitions, 3915 flow. Second operand 10 states and 100 transitions. [2024-01-31 16:53:49,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 240 transitions, 4544 flow [2024-01-31 16:53:49,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 240 transitions, 4325 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-01-31 16:53:49,256 INFO L231 Difference]: Finished difference. Result has 215 places, 205 transitions, 3745 flow [2024-01-31 16:53:49,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3630, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3745, PETRI_PLACES=215, PETRI_TRANSITIONS=205} [2024-01-31 16:53:49,257 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 184 predicate places. [2024-01-31 16:53:49,257 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 205 transitions, 3745 flow [2024-01-31 16:53:49,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:49,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:49,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:49,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-01-31 16:53:49,258 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:49,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:49,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1954569472, now seen corresponding path program 17 times [2024-01-31 16:53:49,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:49,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949947381] [2024-01-31 16:53:49,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:49,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:49,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:49,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:49,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949947381] [2024-01-31 16:53:49,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949947381] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:49,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:49,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:49,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170477187] [2024-01-31 16:53:49,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:49,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:49,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:49,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:49,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:49,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:49,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 205 transitions, 3745 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:49,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:49,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:49,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:50,102 INFO L124 PetriNetUnfolderBase]: 1808/3066 cut-off events. [2024-01-31 16:53:50,103 INFO L125 PetriNetUnfolderBase]: For 40299/40299 co-relation queries the response was YES. [2024-01-31 16:53:50,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20661 conditions, 3066 events. 1808/3066 cut-off events. For 40299/40299 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17141 event pairs, 647 based on Foata normal form. 30/3096 useless extension candidates. Maximal degree in co-relation 20595. Up to 2114 conditions per place. [2024-01-31 16:53:50,137 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 161 selfloop transitions, 74 changer transitions 0/236 dead transitions. [2024-01-31 16:53:50,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 236 transitions, 4485 flow [2024-01-31 16:53:50,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:53:50,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:53:50,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-01-31 16:53:50,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3238095238095238 [2024-01-31 16:53:50,139 INFO L175 Difference]: Start difference. First operand has 215 places, 205 transitions, 3745 flow. Second operand 9 states and 102 transitions. [2024-01-31 16:53:50,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 236 transitions, 4485 flow [2024-01-31 16:53:50,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 236 transitions, 4188 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-01-31 16:53:50,263 INFO L231 Difference]: Finished difference. Result has 209 places, 207 transitions, 3655 flow [2024-01-31 16:53:50,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3457, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3655, PETRI_PLACES=209, PETRI_TRANSITIONS=207} [2024-01-31 16:53:50,263 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 178 predicate places. [2024-01-31 16:53:50,264 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 207 transitions, 3655 flow [2024-01-31 16:53:50,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:50,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:50,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:50,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-01-31 16:53:50,264 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:50,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:50,265 INFO L85 PathProgramCache]: Analyzing trace with hash -643152880, now seen corresponding path program 18 times [2024-01-31 16:53:50,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:50,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670148426] [2024-01-31 16:53:50,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:50,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:50,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:50,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:50,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670148426] [2024-01-31 16:53:50,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670148426] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:50,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:50,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:50,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914049265] [2024-01-31 16:53:50,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:50,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:50,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:50,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:50,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:50,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:50,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 207 transitions, 3655 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:50,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:50,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:50,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:51,129 INFO L124 PetriNetUnfolderBase]: 1778/3036 cut-off events. [2024-01-31 16:53:51,129 INFO L125 PetriNetUnfolderBase]: For 31515/31515 co-relation queries the response was YES. [2024-01-31 16:53:51,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19708 conditions, 3036 events. 1778/3036 cut-off events. For 31515/31515 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17103 event pairs, 661 based on Foata normal form. 30/3066 useless extension candidates. Maximal degree in co-relation 19641. Up to 2114 conditions per place. [2024-01-31 16:53:51,164 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 157 selfloop transitions, 75 changer transitions 1/234 dead transitions. [2024-01-31 16:53:51,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 234 transitions, 4274 flow [2024-01-31 16:53:51,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:53:51,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:53:51,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-01-31 16:53:51,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3142857142857143 [2024-01-31 16:53:51,165 INFO L175 Difference]: Start difference. First operand has 209 places, 207 transitions, 3655 flow. Second operand 9 states and 99 transitions. [2024-01-31 16:53:51,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 234 transitions, 4274 flow [2024-01-31 16:53:51,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 234 transitions, 4167 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-01-31 16:53:51,255 INFO L231 Difference]: Finished difference. Result has 211 places, 204 transitions, 3594 flow [2024-01-31 16:53:51,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3481, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3594, PETRI_PLACES=211, PETRI_TRANSITIONS=204} [2024-01-31 16:53:51,256 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 180 predicate places. [2024-01-31 16:53:51,256 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 204 transitions, 3594 flow [2024-01-31 16:53:51,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:51,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:51,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:51,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-01-31 16:53:51,257 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:51,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:51,257 INFO L85 PathProgramCache]: Analyzing trace with hash 2109006990, now seen corresponding path program 19 times [2024-01-31 16:53:51,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:51,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758787730] [2024-01-31 16:53:51,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:51,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:51,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:51,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:51,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758787730] [2024-01-31 16:53:51,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758787730] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:51,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:51,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:51,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637293373] [2024-01-31 16:53:51,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:51,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:51,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:51,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:51,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:51,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:51,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 204 transitions, 3594 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:51,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:51,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:51,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:51,945 INFO L124 PetriNetUnfolderBase]: 1778/3040 cut-off events. [2024-01-31 16:53:51,945 INFO L125 PetriNetUnfolderBase]: For 29716/29716 co-relation queries the response was YES. [2024-01-31 16:53:51,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19634 conditions, 3040 events. 1778/3040 cut-off events. For 29716/29716 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 17145 event pairs, 669 based on Foata normal form. 6/3046 useless extension candidates. Maximal degree in co-relation 19567. Up to 2114 conditions per place. [2024-01-31 16:53:51,971 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 147 selfloop transitions, 73 changer transitions 5/226 dead transitions. [2024-01-31 16:53:51,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 226 transitions, 4193 flow [2024-01-31 16:53:51,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:53:51,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:53:51,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2024-01-31 16:53:51,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28285714285714286 [2024-01-31 16:53:51,972 INFO L175 Difference]: Start difference. First operand has 211 places, 204 transitions, 3594 flow. Second operand 10 states and 99 transitions. [2024-01-31 16:53:51,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 226 transitions, 4193 flow [2024-01-31 16:53:52,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 226 transitions, 4077 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-01-31 16:53:52,052 INFO L231 Difference]: Finished difference. Result has 210 places, 203 transitions, 3605 flow [2024-01-31 16:53:52,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3480, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3605, PETRI_PLACES=210, PETRI_TRANSITIONS=203} [2024-01-31 16:53:52,053 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 179 predicate places. [2024-01-31 16:53:52,053 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 203 transitions, 3605 flow [2024-01-31 16:53:52,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:52,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:52,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:52,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-01-31 16:53:52,054 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:52,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:52,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1485815286, now seen corresponding path program 20 times [2024-01-31 16:53:52,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:52,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451239446] [2024-01-31 16:53:52,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:52,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:52,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:52,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:52,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451239446] [2024-01-31 16:53:52,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451239446] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:52,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:52,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:52,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090101508] [2024-01-31 16:53:52,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:52,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:52,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:52,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:52,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:52,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:52,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 203 transitions, 3605 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:52,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:52,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:52,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:52,723 INFO L124 PetriNetUnfolderBase]: 1673/2830 cut-off events. [2024-01-31 16:53:52,723 INFO L125 PetriNetUnfolderBase]: For 31234/31234 co-relation queries the response was YES. [2024-01-31 16:53:52,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18438 conditions, 2830 events. 1673/2830 cut-off events. For 31234/31234 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15478 event pairs, 599 based on Foata normal form. 6/2836 useless extension candidates. Maximal degree in co-relation 18376. Up to 1954 conditions per place. [2024-01-31 16:53:52,744 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 139 selfloop transitions, 71 changer transitions 5/216 dead transitions. [2024-01-31 16:53:52,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 216 transitions, 4035 flow [2024-01-31 16:53:52,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:53:52,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:53:52,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 93 transitions. [2024-01-31 16:53:52,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26571428571428574 [2024-01-31 16:53:52,746 INFO L175 Difference]: Start difference. First operand has 210 places, 203 transitions, 3605 flow. Second operand 10 states and 93 transitions. [2024-01-31 16:53:52,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 216 transitions, 4035 flow [2024-01-31 16:53:52,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 216 transitions, 3787 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-01-31 16:53:52,812 INFO L231 Difference]: Finished difference. Result has 207 places, 198 transitions, 3379 flow [2024-01-31 16:53:52,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3278, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3379, PETRI_PLACES=207, PETRI_TRANSITIONS=198} [2024-01-31 16:53:52,813 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 176 predicate places. [2024-01-31 16:53:52,813 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 198 transitions, 3379 flow [2024-01-31 16:53:52,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:52,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:52,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:52,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-01-31 16:53:52,814 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:52,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:52,814 INFO L85 PathProgramCache]: Analyzing trace with hash 139526640, now seen corresponding path program 18 times [2024-01-31 16:53:52,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:52,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486852529] [2024-01-31 16:53:52,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:52,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:52,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:52,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486852529] [2024-01-31 16:53:52,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486852529] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:52,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:52,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:52,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237623306] [2024-01-31 16:53:52,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:52,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:52,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:52,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:52,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:52,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:52,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 198 transitions, 3379 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:52,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:52,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:52,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:53,449 INFO L124 PetriNetUnfolderBase]: 1671/2830 cut-off events. [2024-01-31 16:53:53,449 INFO L125 PetriNetUnfolderBase]: For 26094/26094 co-relation queries the response was YES. [2024-01-31 16:53:53,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18320 conditions, 2830 events. 1671/2830 cut-off events. For 26094/26094 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15546 event pairs, 599 based on Foata normal form. 8/2838 useless extension candidates. Maximal degree in co-relation 18258. Up to 1954 conditions per place. [2024-01-31 16:53:53,472 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 141 selfloop transitions, 68 changer transitions 7/217 dead transitions. [2024-01-31 16:53:53,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 217 transitions, 3918 flow [2024-01-31 16:53:53,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:53:53,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:53:53,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 97 transitions. [2024-01-31 16:53:53,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27714285714285714 [2024-01-31 16:53:53,473 INFO L175 Difference]: Start difference. First operand has 207 places, 198 transitions, 3379 flow. Second operand 10 states and 97 transitions. [2024-01-31 16:53:53,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 217 transitions, 3918 flow [2024-01-31 16:53:53,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 217 transitions, 3748 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-01-31 16:53:53,536 INFO L231 Difference]: Finished difference. Result has 201 places, 197 transitions, 3323 flow [2024-01-31 16:53:53,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3211, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3323, PETRI_PLACES=201, PETRI_TRANSITIONS=197} [2024-01-31 16:53:53,537 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 170 predicate places. [2024-01-31 16:53:53,537 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 197 transitions, 3323 flow [2024-01-31 16:53:53,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:53,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:53,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:53,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-01-31 16:53:53,537 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:53,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:53,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1836771584, now seen corresponding path program 19 times [2024-01-31 16:53:53,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:53,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163182561] [2024-01-31 16:53:53,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:53,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:53,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:53,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:53,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163182561] [2024-01-31 16:53:53,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163182561] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:53,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:53,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:53,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332634826] [2024-01-31 16:53:53,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:53,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:53,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:53,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:53,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:53,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:53,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 197 transitions, 3323 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:53,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:53,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:53,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:54,153 INFO L124 PetriNetUnfolderBase]: 1660/2811 cut-off events. [2024-01-31 16:53:54,154 INFO L125 PetriNetUnfolderBase]: For 25886/25886 co-relation queries the response was YES. [2024-01-31 16:53:54,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18130 conditions, 2811 events. 1660/2811 cut-off events. For 25886/25886 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 15367 event pairs, 589 based on Foata normal form. 8/2819 useless extension candidates. Maximal degree in co-relation 18068. Up to 1946 conditions per place. [2024-01-31 16:53:54,177 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 139 selfloop transitions, 66 changer transitions 7/213 dead transitions. [2024-01-31 16:53:54,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 213 transitions, 3792 flow [2024-01-31 16:53:54,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:53:54,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:53:54,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 94 transitions. [2024-01-31 16:53:54,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26857142857142857 [2024-01-31 16:53:54,178 INFO L175 Difference]: Start difference. First operand has 201 places, 197 transitions, 3323 flow. Second operand 10 states and 94 transitions. [2024-01-31 16:53:54,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 213 transitions, 3792 flow [2024-01-31 16:53:54,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 213 transitions, 3660 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-01-31 16:53:54,248 INFO L231 Difference]: Finished difference. Result has 201 places, 193 transitions, 3242 flow [2024-01-31 16:53:54,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3152, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3242, PETRI_PLACES=201, PETRI_TRANSITIONS=193} [2024-01-31 16:53:54,249 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 170 predicate places. [2024-01-31 16:53:54,249 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 193 transitions, 3242 flow [2024-01-31 16:53:54,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:54,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:54,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:54,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-01-31 16:53:54,249 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:54,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:54,250 INFO L85 PathProgramCache]: Analyzing trace with hash 66644722, now seen corresponding path program 20 times [2024-01-31 16:53:54,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:54,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339791881] [2024-01-31 16:53:54,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:54,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:54,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:53:54,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:54,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339791881] [2024-01-31 16:53:54,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339791881] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:54,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:54,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:53:54,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305379243] [2024-01-31 16:53:54,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:54,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:54,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:54,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:54,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:54,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:54,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 193 transitions, 3242 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:54,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:54,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:54,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:54,856 INFO L124 PetriNetUnfolderBase]: 1587/2679 cut-off events. [2024-01-31 16:53:54,856 INFO L125 PetriNetUnfolderBase]: For 24843/24843 co-relation queries the response was YES. [2024-01-31 16:53:54,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17415 conditions, 2679 events. 1587/2679 cut-off events. For 24843/24843 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 14464 event pairs, 547 based on Foata normal form. 8/2687 useless extension candidates. Maximal degree in co-relation 17353. Up to 1826 conditions per place. [2024-01-31 16:53:54,878 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 135 selfloop transitions, 60 changer transitions 15/211 dead transitions. [2024-01-31 16:53:54,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 211 transitions, 3684 flow [2024-01-31 16:53:54,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:53:54,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:53:54,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 100 transitions. [2024-01-31 16:53:54,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2597402597402597 [2024-01-31 16:53:54,881 INFO L175 Difference]: Start difference. First operand has 201 places, 193 transitions, 3242 flow. Second operand 11 states and 100 transitions. [2024-01-31 16:53:54,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 211 transitions, 3684 flow [2024-01-31 16:53:54,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 211 transitions, 3553 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-01-31 16:53:54,945 INFO L231 Difference]: Finished difference. Result has 199 places, 184 transitions, 3084 flow [2024-01-31 16:53:54,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3040, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3084, PETRI_PLACES=199, PETRI_TRANSITIONS=184} [2024-01-31 16:53:54,946 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 168 predicate places. [2024-01-31 16:53:54,946 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 184 transitions, 3084 flow [2024-01-31 16:53:54,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:54,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:54,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:54,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-01-31 16:53:54,947 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:54,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:54,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1022404932, now seen corresponding path program 1 times [2024-01-31 16:53:54,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:54,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683090889] [2024-01-31 16:53:54,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:54,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:55,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:55,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:55,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683090889] [2024-01-31 16:53:55,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683090889] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:55,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594797530] [2024-01-31 16:53:55,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:55,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:55,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:55,184 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:55,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-01-31 16:53:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:55,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 16:53:55,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:53:55,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:56,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:53:56,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594797530] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:56,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:56,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 29 [2024-01-31 16:53:56,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318118925] [2024-01-31 16:53:56,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:56,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-31 16:53:56,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:56,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-31 16:53:56,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2024-01-31 16:53:56,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:56,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 184 transitions, 3084 flow. Second operand has 30 states, 30 states have (on average 5.5) internal successors, (165), 30 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:56,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:56,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:56,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:57,782 INFO L124 PetriNetUnfolderBase]: 4857/8217 cut-off events. [2024-01-31 16:53:57,782 INFO L125 PetriNetUnfolderBase]: For 76870/76870 co-relation queries the response was YES. [2024-01-31 16:53:57,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52964 conditions, 8217 events. 4857/8217 cut-off events. For 76870/76870 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 55111 event pairs, 980 based on Foata normal form. 3/8220 useless extension candidates. Maximal degree in co-relation 52902. Up to 1713 conditions per place. [2024-01-31 16:53:57,967 INFO L140 encePairwiseOnDemand]: 21/35 looper letters, 542 selfloop transitions, 118 changer transitions 5/666 dead transitions. [2024-01-31 16:53:57,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 666 transitions, 11707 flow [2024-01-31 16:53:57,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-31 16:53:57,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-31 16:53:57,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 263 transitions. [2024-01-31 16:53:57,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3578231292517007 [2024-01-31 16:53:57,969 INFO L175 Difference]: Start difference. First operand has 199 places, 184 transitions, 3084 flow. Second operand 21 states and 263 transitions. [2024-01-31 16:53:57,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 666 transitions, 11707 flow [2024-01-31 16:53:58,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 666 transitions, 11209 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-01-31 16:53:58,257 INFO L231 Difference]: Finished difference. Result has 212 places, 289 transitions, 5368 flow [2024-01-31 16:53:58,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2931, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5368, PETRI_PLACES=212, PETRI_TRANSITIONS=289} [2024-01-31 16:53:58,258 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 181 predicate places. [2024-01-31 16:53:58,258 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 289 transitions, 5368 flow [2024-01-31 16:53:58,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.5) internal successors, (165), 30 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:58,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:58,259 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:58,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:58,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:58,471 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:58,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:58,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1257481195, now seen corresponding path program 2 times [2024-01-31 16:53:58,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:58,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210541964] [2024-01-31 16:53:58,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:58,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:58,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:58,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:53:58,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:58,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210541964] [2024-01-31 16:53:58,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210541964] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:58,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196568558] [2024-01-31 16:53:58,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:53:58,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:58,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:58,676 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:58,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-01-31 16:53:58,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:53:58,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:58,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:53:58,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:53:59,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:53:59,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196568558] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:59,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:59,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-01-31 16:53:59,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222278807] [2024-01-31 16:53:59,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:59,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-31 16:53:59,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:59,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-31 16:53:59,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2024-01-31 16:53:59,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:53:59,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 289 transitions, 5368 flow. Second operand has 32 states, 32 states have (on average 5.625) internal successors, (180), 32 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:59,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:59,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:53:59,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:04,410 INFO L124 PetriNetUnfolderBase]: 13245/22328 cut-off events. [2024-01-31 16:54:04,410 INFO L125 PetriNetUnfolderBase]: For 215792/215792 co-relation queries the response was YES. [2024-01-31 16:54:04,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147728 conditions, 22328 events. 13245/22328 cut-off events. For 215792/215792 co-relation queries the response was YES. Maximal size of possible extension queue 1125. Compared 173911 event pairs, 2049 based on Foata normal form. 6/22330 useless extension candidates. Maximal degree in co-relation 147655. Up to 4621 conditions per place. [2024-01-31 16:54:04,702 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 1465 selfloop transitions, 203 changer transitions 35/1704 dead transitions. [2024-01-31 16:54:04,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 1704 transitions, 30850 flow [2024-01-31 16:54:04,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-01-31 16:54:04,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-01-31 16:54:04,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 578 transitions. [2024-01-31 16:54:04,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42344322344322344 [2024-01-31 16:54:04,709 INFO L175 Difference]: Start difference. First operand has 212 places, 289 transitions, 5368 flow. Second operand 39 states and 578 transitions. [2024-01-31 16:54:04,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 1704 transitions, 30850 flow [2024-01-31 16:54:07,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 1704 transitions, 30703 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-01-31 16:54:07,047 INFO L231 Difference]: Finished difference. Result has 266 places, 421 transitions, 8043 flow [2024-01-31 16:54:07,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5309, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=8043, PETRI_PLACES=266, PETRI_TRANSITIONS=421} [2024-01-31 16:54:07,048 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 235 predicate places. [2024-01-31 16:54:07,048 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 421 transitions, 8043 flow [2024-01-31 16:54:07,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.625) internal successors, (180), 32 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:54:07,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:54:07,048 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:54:07,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-01-31 16:54:07,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2024-01-31 16:54:07,260 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:54:07,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:07,261 INFO L85 PathProgramCache]: Analyzing trace with hash 944561946, now seen corresponding path program 3 times [2024-01-31 16:54:07,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:07,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600995270] [2024-01-31 16:54:07,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:07,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:07,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:07,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:07,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600995270] [2024-01-31 16:54:07,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600995270] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:07,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399785585] [2024-01-31 16:54:07,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:54:07,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:07,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:07,471 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:07,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-01-31 16:54:07,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:54:07,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:54:07,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:54:07,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:07,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:07,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:08,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:08,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399785585] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:54:08,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:54:08,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2024-01-31 16:54:08,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106279793] [2024-01-31 16:54:08,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:54:08,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-31 16:54:08,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:54:08,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-31 16:54:08,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2024-01-31 16:54:08,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:54:08,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 421 transitions, 8043 flow. Second operand has 29 states, 29 states have (on average 5.896551724137931) internal successors, (171), 29 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:54:08,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:54:08,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:54:08,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:17,412 INFO L124 PetriNetUnfolderBase]: 23866/40126 cut-off events. [2024-01-31 16:54:17,412 INFO L125 PetriNetUnfolderBase]: For 453812/453812 co-relation queries the response was YES. [2024-01-31 16:54:17,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274898 conditions, 40126 events. 23866/40126 cut-off events. For 453812/453812 co-relation queries the response was YES. Maximal size of possible extension queue 1985. Compared 338551 event pairs, 3949 based on Foata normal form. 9/40132 useless extension candidates. Maximal degree in co-relation 274807. Up to 8345 conditions per place. [2024-01-31 16:54:18,136 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 1501 selfloop transitions, 345 changer transitions 26/1873 dead transitions. [2024-01-31 16:54:18,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 1873 transitions, 35285 flow [2024-01-31 16:54:18,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-01-31 16:54:18,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-01-31 16:54:18,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 564 transitions. [2024-01-31 16:54:18,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355212355212355 [2024-01-31 16:54:18,146 INFO L175 Difference]: Start difference. First operand has 266 places, 421 transitions, 8043 flow. Second operand 37 states and 564 transitions. [2024-01-31 16:54:18,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 1873 transitions, 35285 flow [2024-01-31 16:54:26,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 1873 transitions, 34788 flow, removed 109 selfloop flow, removed 12 redundant places. [2024-01-31 16:54:26,756 INFO L231 Difference]: Finished difference. Result has 303 places, 587 transitions, 11826 flow [2024-01-31 16:54:26,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=7801, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=11826, PETRI_PLACES=303, PETRI_TRANSITIONS=587} [2024-01-31 16:54:26,757 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 272 predicate places. [2024-01-31 16:54:26,757 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 587 transitions, 11826 flow [2024-01-31 16:54:26,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.896551724137931) internal successors, (171), 29 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:54:26,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:54:26,757 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:54:26,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-01-31 16:54:26,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:26,963 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:54:26,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:26,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1601722240, now seen corresponding path program 4 times [2024-01-31 16:54:26,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:26,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813519789] [2024-01-31 16:54:26,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:26,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:54:27,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:27,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813519789] [2024-01-31 16:54:27,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813519789] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:27,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023065529] [2024-01-31 16:54:27,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:54:27,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:27,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:27,176 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:27,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-01-31 16:54:27,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:54:27,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:54:27,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 20 conjunts are in the unsatisfiable core [2024-01-31 16:54:27,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:27,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:54:27,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:28,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:54:28,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023065529] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:54:28,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:54:28,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 32 [2024-01-31 16:54:28,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047759096] [2024-01-31 16:54:28,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:54:28,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-31 16:54:28,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:54:28,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-31 16:54:28,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2024-01-31 16:54:28,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:54:28,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 587 transitions, 11826 flow. Second operand has 32 states, 32 states have (on average 5.625) internal successors, (180), 32 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:54:28,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:54:28,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:54:28,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:39,723 INFO L124 PetriNetUnfolderBase]: 26619/45099 cut-off events. [2024-01-31 16:54:39,724 INFO L125 PetriNetUnfolderBase]: For 586448/586448 co-relation queries the response was YES. [2024-01-31 16:54:40,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311292 conditions, 45099 events. 26619/45099 cut-off events. For 586448/586448 co-relation queries the response was YES. Maximal size of possible extension queue 2163. Compared 387659 event pairs, 3530 based on Foata normal form. 10/45109 useless extension candidates. Maximal degree in co-relation 311190. Up to 8913 conditions per place. [2024-01-31 16:54:40,548 INFO L140 encePairwiseOnDemand]: 19/35 looper letters, 1021 selfloop transitions, 568 changer transitions 24/1614 dead transitions. [2024-01-31 16:54:40,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1614 transitions, 32184 flow [2024-01-31 16:54:40,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-01-31 16:54:40,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-01-31 16:54:40,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 500 transitions. [2024-01-31 16:54:40,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3401360544217687 [2024-01-31 16:54:40,568 INFO L175 Difference]: Start difference. First operand has 303 places, 587 transitions, 11826 flow. Second operand 42 states and 500 transitions. [2024-01-31 16:54:40,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1614 transitions, 32184 flow [2024-01-31 16:54:51,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 1614 transitions, 31644 flow, removed 107 selfloop flow, removed 17 redundant places. [2024-01-31 16:54:51,964 INFO L231 Difference]: Finished difference. Result has 350 places, 838 transitions, 19007 flow [2024-01-31 16:54:51,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=11428, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=19007, PETRI_PLACES=350, PETRI_TRANSITIONS=838} [2024-01-31 16:54:51,965 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 319 predicate places. [2024-01-31 16:54:51,965 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 838 transitions, 19007 flow [2024-01-31 16:54:51,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.625) internal successors, (180), 32 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:54:51,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:54:51,965 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:54:51,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-01-31 16:54:52,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:52,177 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:54:52,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:52,178 INFO L85 PathProgramCache]: Analyzing trace with hash -4091329, now seen corresponding path program 1 times [2024-01-31 16:54:52,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:52,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190072791] [2024-01-31 16:54:52,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:52,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:52,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:54:52,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:52,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190072791] [2024-01-31 16:54:52,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190072791] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:52,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467789310] [2024-01-31 16:54:52,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:52,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:52,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:52,236 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:52,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-01-31 16:54:52,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:52,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:54:52,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:52,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:54:52,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:54:52,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467789310] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:54:52,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:54:52,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2024-01-31 16:54:52,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979134513] [2024-01-31 16:54:52,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:54:52,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 16:54:52,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:54:52,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 16:54:52,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-01-31 16:54:52,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 35 [2024-01-31 16:54:52,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 838 transitions, 19007 flow. Second operand has 16 states, 16 states have (on average 6.375) internal successors, (102), 16 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:54:52,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:54:52,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 35 [2024-01-31 16:54:52,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand