./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-nzb-file-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-nzb-file-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-nzb-file-symm.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/chl-nzb-file-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 16:49:36,994 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:49:37,044 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:49:37,047 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:49:37,048 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:49:37,060 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:49:37,061 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:49:37,061 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:49:37,062 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:49:37,062 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:49:37,062 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:49:37,062 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:49:37,063 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:49:37,063 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:49:37,063 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:49:37,064 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:49:37,064 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:49:37,064 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:49:37,065 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:49:37,065 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:49:37,065 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:49:37,066 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:49:37,066 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:49:37,066 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:49:37,067 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:49:37,067 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:49:37,067 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:49:37,067 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:49:37,068 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:49:37,068 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:49:37,068 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:49:37,069 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:49:37,069 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:49:37,069 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:49:37,069 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:49:37,070 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:49:37,070 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:49:37,070 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:49:37,070 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:49:37,071 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:49:37,071 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:49:37,071 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:49:37,072 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:49:37,072 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:49:37,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:49:37,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:49:37,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:49:37,253 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:49:37,253 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:49:37,254 INFO L431 ainManager$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-nzb-file-symm.wvr.yml/witness.yml [2024-01-31 16:49:37,425 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:49:37,427 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:49:37,428 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c [2024-01-31 16:49:38,483 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:49:38,716 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:49:38,720 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c [2024-01-31 16:49:38,729 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e90391a2c/c5422897ad2b4e01a57351a6c2c224d9/FLAG9f32e32fd [2024-01-31 16:49:38,743 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e90391a2c/c5422897ad2b4e01a57351a6c2c224d9 [2024-01-31 16:49:38,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:49:38,745 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:49:38,746 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:49:38,747 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:49:38,750 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:49:38,752 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:49:37" (1/2) ... [2024-01-31 16:49:38,753 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36dac35d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:49:38, skipping insertion in model container [2024-01-31 16:49:38,753 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:49:37" (1/2) ... [2024-01-31 16:49:38,754 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@415f147 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:49:38, skipping insertion in model container [2024-01-31 16:49:38,754 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:49:38" (2/2) ... [2024-01-31 16:49:38,755 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36dac35d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:49:38, skipping insertion in model container [2024-01-31 16:49:38,755 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:49:38" (2/2) ... [2024-01-31 16:49:38,756 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:49:38,817 INFO L93 nessWitnessExtractor]: Witness did not contain any usable entries. [2024-01-31 16:49:38,842 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:49:39,003 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-nzb-file-symm.wvr.c[4955,4968] [2024-01-31 16:49:39,015 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:49:39,025 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 16:49:39,046 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-nzb-file-symm.wvr.c[4955,4968] [2024-01-31 16:49:39,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:49:39,059 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:49:39,059 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:49:39 WrapperNode [2024-01-31 16:49:39,059 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:49:39,060 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:49:39,060 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:49:39,060 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:49:39,065 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:49:39" (1/1) ... [2024-01-31 16:49:39,081 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:49:39" (1/1) ... [2024-01-31 16:49:39,123 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 21, calls inlined = 29, statements flattened = 409 [2024-01-31 16:49:39,130 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:49:39,131 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:49:39,131 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:49:39,131 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:49:39,139 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:49:39" (1/1) ... [2024-01-31 16:49:39,140 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:49:39" (1/1) ... [2024-01-31 16:49:39,153 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:49:39" (1/1) ... [2024-01-31 16:49:39,178 INFO L175 MemorySlicer]: Split 24 memory accesses to 4 slices as follows [2, 2, 2, 18]. 75 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, 1, 1, 2]. [2024-01-31 16:49:39,178 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:49:39" (1/1) ... [2024-01-31 16:49:39,178 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:49:39" (1/1) ... [2024-01-31 16:49:39,186 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:49:39" (1/1) ... [2024-01-31 16:49:39,189 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:49:39" (1/1) ... [2024-01-31 16:49:39,190 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:49:39" (1/1) ... [2024-01-31 16:49:39,191 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:49:39" (1/1) ... [2024-01-31 16:49:39,194 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:49:39,195 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:49:39,195 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:49:39,195 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:49:39,195 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:49:39" (1/1) ... [2024-01-31 16:49:39,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:49:39,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:39,220 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 16:49:39,233 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 16:49:39,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:49:39,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:49:39,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:49:39,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:49:39,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:49:39,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 16:49:39,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 16:49:39,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 16:49:39,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 16:49:39,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 16:49:39,250 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 16:49:39,250 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 16:49:39,251 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 16:49:39,251 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 16:49:39,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:49:39,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:49:39,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:49:39,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 16:49:39,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-31 16:49:39,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:49:39,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:49:39,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:49:39,253 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 16:49:39,348 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:49:39,350 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:49:39,857 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:49:39,858 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:49:40,191 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:49:40,191 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-01-31 16:49:40,191 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:49:40 BoogieIcfgContainer [2024-01-31 16:49:40,191 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:49:40,193 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:49:40,193 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:49:40,195 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:49:40,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:49:37" (1/4) ... [2024-01-31 16:49:40,196 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bddf7c4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:49:40, skipping insertion in model container [2024-01-31 16:49:40,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:49:38" (2/4) ... [2024-01-31 16:49:40,196 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bddf7c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:49:40, skipping insertion in model container [2024-01-31 16:49:40,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:49:39" (3/4) ... [2024-01-31 16:49:40,197 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bddf7c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:49:40, skipping insertion in model container [2024-01-31 16:49:40,197 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:49:40" (4/4) ... [2024-01-31 16:49:40,197 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2024-01-31 16:49:40,210 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:49:40,211 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 16:49:40,211 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:49:40,264 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 16:49:40,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 35 transitions, 84 flow [2024-01-31 16:49:40,304 INFO L124 PetriNetUnfolderBase]: 8/33 cut-off events. [2024-01-31 16:49:40,304 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:49:40,306 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 46 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 16:49:40,307 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 35 transitions, 84 flow [2024-01-31 16:49:40,308 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 32 transitions, 76 flow [2024-01-31 16:49:40,356 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:49:40,361 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;@19ba7d80, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:49:40,361 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-31 16:49:40,370 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:49:40,370 INFO L124 PetriNetUnfolderBase]: 8/31 cut-off events. [2024-01-31 16:49:40,370 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:49:40,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:40,371 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 16:49:40,371 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 16:49:40,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:40,374 INFO L85 PathProgramCache]: Analyzing trace with hash -704617220, now seen corresponding path program 1 times [2024-01-31 16:49:40,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:40,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96609976] [2024-01-31 16:49:40,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:40,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:40,748 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 16:49:40,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:40,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96609976] [2024-01-31 16:49:40,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96609976] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:49:40,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:49:40,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:49:40,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148328661] [2024-01-31 16:49:40,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:49:40,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:49:40,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:40,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:49:40,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:49:40,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:49:40,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 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 16:49:40,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:40,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:49:40,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:40,920 INFO L124 PetriNetUnfolderBase]: 163/281 cut-off events. [2024-01-31 16:49:40,920 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-01-31 16:49:40,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 281 events. 163/281 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 912 event pairs, 105 based on Foata normal form. 28/250 useless extension candidates. Maximal degree in co-relation 486. Up to 265 conditions per place. [2024-01-31 16:49:40,925 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 25 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2024-01-31 16:49:40,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 32 transitions, 134 flow [2024-01-31 16:49:40,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:49:40,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:49:40,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2024-01-31 16:49:40,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-01-31 16:49:40,935 INFO L175 Difference]: Start difference. First operand has 31 places, 32 transitions, 76 flow. Second operand 3 states and 48 transitions. [2024-01-31 16:49:40,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 32 transitions, 134 flow [2024-01-31 16:49:40,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 126 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 16:49:40,938 INFO L231 Difference]: Finished difference. Result has 30 places, 32 transitions, 86 flow [2024-01-31 16:49:40,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=30, PETRI_TRANSITIONS=32} [2024-01-31 16:49:40,942 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2024-01-31 16:49:40,942 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 32 transitions, 86 flow [2024-01-31 16:49:40,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 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 16:49:40,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:40,942 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 16:49:40,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:49:40,943 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 16:49:40,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:40,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1658001116, now seen corresponding path program 1 times [2024-01-31 16:49:40,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:40,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409328150] [2024-01-31 16:49:40,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:40,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:41,064 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 16:49:41,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:41,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409328150] [2024-01-31 16:49:41,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409328150] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:41,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140607401] [2024-01-31 16:49:41,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:41,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:41,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:41,067 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 16:49:41,097 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 16:49:41,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:41,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-31 16:49:41,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:41,255 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 16:49:41,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:41,273 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 16:49:41,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140607401] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:41,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:41,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-01-31 16:49:41,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473301454] [2024-01-31 16:49:41,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:41,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:49:41,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:41,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:49:41,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:49:41,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:49:41,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 32 transitions, 86 flow. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 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 16:49:41,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:41,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:49:41,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:41,385 INFO L124 PetriNetUnfolderBase]: 163/287 cut-off events. [2024-01-31 16:49:41,385 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-31 16:49:41,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 287 events. 163/287 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 913 event pairs, 105 based on Foata normal form. 3/232 useless extension candidates. Maximal degree in co-relation 555. Up to 265 conditions per place. [2024-01-31 16:49:41,387 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 25 selfloop transitions, 10 changer transitions 0/38 dead transitions. [2024-01-31 16:49:41,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 38 transitions, 180 flow [2024-01-31 16:49:41,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:49:41,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:49:41,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 71 transitions. [2024-01-31 16:49:41,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3380952380952381 [2024-01-31 16:49:41,388 INFO L175 Difference]: Start difference. First operand has 30 places, 32 transitions, 86 flow. Second operand 6 states and 71 transitions. [2024-01-31 16:49:41,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 38 transitions, 180 flow [2024-01-31 16:49:41,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 38 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:49:41,392 INFO L231 Difference]: Finished difference. Result has 37 places, 38 transitions, 148 flow [2024-01-31 16:49:41,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=148, PETRI_PLACES=37, PETRI_TRANSITIONS=38} [2024-01-31 16:49:41,393 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2024-01-31 16:49:41,393 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 38 transitions, 148 flow [2024-01-31 16:49:41,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 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 16:49:41,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:41,394 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:41,419 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 16:49:41,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:41,606 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 16:49:41,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:41,607 INFO L85 PathProgramCache]: Analyzing trace with hash -2039820346, now seen corresponding path program 2 times [2024-01-31 16:49:41,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:41,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626447049] [2024-01-31 16:49:41,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:41,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 16:49:41,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:41,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626447049] [2024-01-31 16:49:41,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626447049] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:41,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817267730] [2024-01-31 16:49:41,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:49:41,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:41,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:41,832 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 16:49:41,865 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 16:49:41,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-31 16:49:41,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:41,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-31 16:49:41,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:42,493 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-01-31 16:49:42,494 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:49:42,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817267730] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:49:42,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:49:42,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-01-31 16:49:42,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017374312] [2024-01-31 16:49:42,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:49:42,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:49:42,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:42,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:49:42,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-01-31 16:49:42,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:49:42,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 38 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 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 16:49:42,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:42,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:49:42,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:42,683 INFO L124 PetriNetUnfolderBase]: 207/383 cut-off events. [2024-01-31 16:49:42,683 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 16:49:42,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 804 conditions, 383 events. 207/383 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1463 event pairs, 105 based on Foata normal form. 1/318 useless extension candidates. Maximal degree in co-relation 743. Up to 259 conditions per place. [2024-01-31 16:49:42,686 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 44 selfloop transitions, 1 changer transitions 10/58 dead transitions. [2024-01-31 16:49:42,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 58 transitions, 303 flow [2024-01-31 16:49:42,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:49:42,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:49:42,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2024-01-31 16:49:42,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928571428571429 [2024-01-31 16:49:42,690 INFO L175 Difference]: Start difference. First operand has 37 places, 38 transitions, 148 flow. Second operand 4 states and 69 transitions. [2024-01-31 16:49:42,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 58 transitions, 303 flow [2024-01-31 16:49:42,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 58 transitions, 287 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-31 16:49:42,692 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 141 flow [2024-01-31 16:49:42,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2024-01-31 16:49:42,694 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2024-01-31 16:49:42,694 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 141 flow [2024-01-31 16:49:42,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 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 16:49:42,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:42,694 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:42,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-01-31 16:49:42,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-01-31 16:49:42,907 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 16:49:42,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:42,908 INFO L85 PathProgramCache]: Analyzing trace with hash -685775356, now seen corresponding path program 3 times [2024-01-31 16:49:42,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:42,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350460763] [2024-01-31 16:49:42,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:42,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:42,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:43,033 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 16:49:43,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:43,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350460763] [2024-01-31 16:49:43,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350460763] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:43,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22179105] [2024-01-31 16:49:43,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:49:43,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:43,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:43,035 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 16:49:43,059 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 16:49:43,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-01-31 16:49:43,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:43,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-31 16:49:43,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-01-31 16:49:43,427 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:49:43,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22179105] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:49:43,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:49:43,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-01-31 16:49:43,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286900316] [2024-01-31 16:49:43,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:49:43,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:49:43,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:43,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:49:43,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-01-31 16:49:43,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:49:43,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 141 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 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 16:49:43,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:43,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:49:43,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:43,598 INFO L124 PetriNetUnfolderBase]: 227/434 cut-off events. [2024-01-31 16:49:43,598 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2024-01-31 16:49:43,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 949 conditions, 434 events. 227/434 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1688 event pairs, 145 based on Foata normal form. 5/381 useless extension candidates. Maximal degree in co-relation 927. Up to 333 conditions per place. [2024-01-31 16:49:43,600 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 44 selfloop transitions, 1 changer transitions 8/56 dead transitions. [2024-01-31 16:49:43,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 56 transitions, 292 flow [2024-01-31 16:49:43,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:49:43,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:49:43,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-01-31 16:49:43,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-01-31 16:49:43,601 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 141 flow. Second operand 4 states and 67 transitions. [2024-01-31 16:49:43,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 56 transitions, 292 flow [2024-01-31 16:49:43,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 56 transitions, 286 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-01-31 16:49:43,603 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 147 flow [2024-01-31 16:49:43,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2024-01-31 16:49:43,604 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 12 predicate places. [2024-01-31 16:49:43,604 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 147 flow [2024-01-31 16:49:43,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 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 16:49:43,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:43,604 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:43,630 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 16:49:43,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:43,816 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 16:49:43,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:43,817 INFO L85 PathProgramCache]: Analyzing trace with hash -474829898, now seen corresponding path program 1 times [2024-01-31 16:49:43,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:43,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681770717] [2024-01-31 16:49:43,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:43,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:43,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:43,877 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-01-31 16:49:43,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:43,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681770717] [2024-01-31 16:49:43,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681770717] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:49:43,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:49:43,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:49:43,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987404768] [2024-01-31 16:49:43,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:49:43,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:49:43,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:43,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:49:43,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:49:43,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:49:43,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 16:49:43,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:43,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:49:43,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:43,956 INFO L124 PetriNetUnfolderBase]: 157/307 cut-off events. [2024-01-31 16:49:43,956 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2024-01-31 16:49:43,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 692 conditions, 307 events. 157/307 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1014 event pairs, 61 based on Foata normal form. 18/296 useless extension candidates. Maximal degree in co-relation 677. Up to 212 conditions per place. [2024-01-31 16:49:43,957 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 38 selfloop transitions, 2 changer transitions 6/49 dead transitions. [2024-01-31 16:49:43,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 49 transitions, 267 flow [2024-01-31 16:49:43,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:49:43,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:49:43,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-01-31 16:49:43,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-01-31 16:49:43,958 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 147 flow. Second operand 3 states and 55 transitions. [2024-01-31 16:49:43,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 49 transitions, 267 flow [2024-01-31 16:49:43,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 264 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-01-31 16:49:43,960 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 150 flow [2024-01-31 16:49:43,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2024-01-31 16:49:43,961 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 12 predicate places. [2024-01-31 16:49:43,961 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 150 flow [2024-01-31 16:49:43,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 16:49:43,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:43,961 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 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 16:49:43,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 16:49:43,962 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 16:49:43,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:43,962 INFO L85 PathProgramCache]: Analyzing trace with hash -595105902, now seen corresponding path program 1 times [2024-01-31 16:49:43,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:43,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029425135] [2024-01-31 16:49:43,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:43,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:44,078 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 16:49:44,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:44,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029425135] [2024-01-31 16:49:44,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029425135] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:44,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743154247] [2024-01-31 16:49:44,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:44,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:44,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:44,090 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 16:49:44,091 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 16:49:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:44,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:49:44,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:44,263 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 16:49:44,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 16:49:44,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743154247] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:44,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:44,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-31 16:49:44,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500272549] [2024-01-31 16:49:44,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:44,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 16:49:44,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:44,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 16:49:44,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:49:44,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:49:44,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 150 flow. Second operand has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 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 16:49:44,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:44,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:49:44,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:44,390 INFO L124 PetriNetUnfolderBase]: 135/259 cut-off events. [2024-01-31 16:49:44,391 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-01-31 16:49:44,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 259 events. 135/259 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 743 event pairs, 97 based on Foata normal form. 1/230 useless extension candidates. Maximal degree in co-relation 554. Up to 237 conditions per place. [2024-01-31 16:49:44,392 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 25 selfloop transitions, 12 changer transitions 0/40 dead transitions. [2024-01-31 16:49:44,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 40 transitions, 236 flow [2024-01-31 16:49:44,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:49:44,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:49:44,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 72 transitions. [2024-01-31 16:49:44,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2938775510204082 [2024-01-31 16:49:44,394 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 150 flow. Second operand 7 states and 72 transitions. [2024-01-31 16:49:44,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 40 transitions, 236 flow [2024-01-31 16:49:44,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 40 transitions, 228 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-01-31 16:49:44,396 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 188 flow [2024-01-31 16:49:44,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=188, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2024-01-31 16:49:44,396 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 15 predicate places. [2024-01-31 16:49:44,396 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 188 flow [2024-01-31 16:49:44,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 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 16:49:44,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:44,397 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 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 16:49:44,413 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 16:49:44,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:44,613 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 16:49:44,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:44,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1689468220, now seen corresponding path program 2 times [2024-01-31 16:49:44,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:44,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253329570] [2024-01-31 16:49:44,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:44,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:44,716 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:44,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:44,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253329570] [2024-01-31 16:49:44,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253329570] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:49:44,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:49:44,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:49:44,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473286841] [2024-01-31 16:49:44,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:49:44,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:49:44,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:44,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:49:44,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:49:44,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:49:44,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 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 16:49:44,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:44,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:49:44,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:44,836 INFO L124 PetriNetUnfolderBase]: 175/332 cut-off events. [2024-01-31 16:49:44,836 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-01-31 16:49:44,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 754 conditions, 332 events. 175/332 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1094 event pairs, 97 based on Foata normal form. 14/299 useless extension candidates. Maximal degree in co-relation 679. Up to 247 conditions per place. [2024-01-31 16:49:44,838 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 44 selfloop transitions, 3 changer transitions 1/51 dead transitions. [2024-01-31 16:49:44,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 309 flow [2024-01-31 16:49:44,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:49:44,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:49:44,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2024-01-31 16:49:44,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2024-01-31 16:49:44,839 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 188 flow. Second operand 3 states and 52 transitions. [2024-01-31 16:49:44,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 309 flow [2024-01-31 16:49:44,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 285 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-01-31 16:49:44,841 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 179 flow [2024-01-31 16:49:44,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2024-01-31 16:49:44,841 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 14 predicate places. [2024-01-31 16:49:44,841 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 179 flow [2024-01-31 16:49:44,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 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 16:49:44,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:44,842 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 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] [2024-01-31 16:49:44,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 16:49:44,842 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 16:49:44,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:44,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1165883678, now seen corresponding path program 1 times [2024-01-31 16:49:44,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:44,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49200454] [2024-01-31 16:49:44,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:44,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:45,025 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-01-31 16:49:45,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:45,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49200454] [2024-01-31 16:49:45,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49200454] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:49:45,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:49:45,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:49:45,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354210329] [2024-01-31 16:49:45,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:49:45,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:49:45,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:45,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:49:45,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:49:45,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:49:45,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 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 16:49:45,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:45,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:49:45,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:45,143 INFO L124 PetriNetUnfolderBase]: 227/437 cut-off events. [2024-01-31 16:49:45,143 INFO L125 PetriNetUnfolderBase]: For 176/176 co-relation queries the response was YES. [2024-01-31 16:49:45,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1031 conditions, 437 events. 227/437 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1679 event pairs, 133 based on Foata normal form. 18/415 useless extension candidates. Maximal degree in co-relation 966. Up to 315 conditions per place. [2024-01-31 16:49:45,145 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 46 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2024-01-31 16:49:45,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 316 flow [2024-01-31 16:49:45,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:49:45,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:49:45,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2024-01-31 16:49:45,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2024-01-31 16:49:45,146 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 179 flow. Second operand 3 states and 52 transitions. [2024-01-31 16:49:45,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 316 flow [2024-01-31 16:49:45,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 311 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:49:45,148 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 191 flow [2024-01-31 16:49:45,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-01-31 16:49:45,148 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 16 predicate places. [2024-01-31 16:49:45,149 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 191 flow [2024-01-31 16:49:45,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 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 16:49:45,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:45,149 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:45,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-31 16:49:45,149 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 16:49:45,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:45,150 INFO L85 PathProgramCache]: Analyzing trace with hash -79656149, now seen corresponding path program 1 times [2024-01-31 16:49:45,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:45,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771669407] [2024-01-31 16:49:45,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:45,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:49,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:49,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771669407] [2024-01-31 16:49:49,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771669407] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:49,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804274808] [2024-01-31 16:49:49,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:49,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:49,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:49,036 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 16:49:49,060 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 16:49:49,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:49,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 43 conjunts are in the unsatisfiable core [2024-01-31 16:49:49,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:50,620 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:50,620 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 367 treesize of output 299 [2024-01-31 16:49:51,411 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:51,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:53,461 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-31 16:49:53,462 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 393 treesize of output 356 [2024-01-31 16:49:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:54,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804274808] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:54,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:54,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2024-01-31 16:49:54,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793179637] [2024-01-31 16:49:54,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:54,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:49:54,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:54,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:49:54,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:49:54,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:49:54,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 191 flow. Second operand has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 0 states have call successors, (0), 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 16:49:54,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:54,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:49:54,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:57,440 INFO L124 PetriNetUnfolderBase]: 483/924 cut-off events. [2024-01-31 16:49:57,444 INFO L125 PetriNetUnfolderBase]: For 432/432 co-relation queries the response was YES. [2024-01-31 16:49:57,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2247 conditions, 924 events. 483/924 cut-off events. For 432/432 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4595 event pairs, 77 based on Foata normal form. 2/924 useless extension candidates. Maximal degree in co-relation 2181. Up to 178 conditions per place. [2024-01-31 16:49:57,449 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 99 selfloop transitions, 32 changer transitions 21/155 dead transitions. [2024-01-31 16:49:57,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 155 transitions, 832 flow [2024-01-31 16:49:57,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-31 16:49:57,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-31 16:49:57,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 228 transitions. [2024-01-31 16:49:57,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619047619047619 [2024-01-31 16:49:57,451 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 191 flow. Second operand 18 states and 228 transitions. [2024-01-31 16:49:57,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 155 transitions, 832 flow [2024-01-31 16:49:57,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 155 transitions, 817 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:49:57,453 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 403 flow [2024-01-31 16:49:57,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=403, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-01-31 16:49:57,456 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 36 predicate places. [2024-01-31 16:49:57,457 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 403 flow [2024-01-31 16:49:57,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 0 states have call successors, (0), 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 16:49:57,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:57,458 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:57,484 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 16:49:57,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:57,670 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 16:49:57,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:57,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1966457009, now seen corresponding path program 2 times [2024-01-31 16:49:57,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:57,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394253485] [2024-01-31 16:49:57,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:57,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:01,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:01,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394253485] [2024-01-31 16:50:01,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394253485] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:01,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332948284] [2024-01-31 16:50:01,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:50:01,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:01,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:01,146 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 16:50:01,147 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 16:50:01,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:50:01,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:50:01,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 53 conjunts are in the unsatisfiable core [2024-01-31 16:50:01,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:02,277 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:50:02,277 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 326 treesize of output 274 [2024-01-31 16:50:03,117 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:03,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:05,115 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:50:05,116 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 387 treesize of output 359 [2024-01-31 16:50:06,103 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:06,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332948284] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:06,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:06,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2024-01-31 16:50:06,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365733796] [2024-01-31 16:50:06,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:06,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:50:06,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:06,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:50:06,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:50:06,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:50:06,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 403 flow. Second operand has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 23 states have internal predecessors, (179), 0 states have call successors, (0), 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 16:50:06,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:06,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:50:06,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:07,204 INFO L124 PetriNetUnfolderBase]: 683/1346 cut-off events. [2024-01-31 16:50:07,205 INFO L125 PetriNetUnfolderBase]: For 1824/1824 co-relation queries the response was YES. [2024-01-31 16:50:07,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3783 conditions, 1346 events. 683/1346 cut-off events. For 1824/1824 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7478 event pairs, 157 based on Foata normal form. 1/1341 useless extension candidates. Maximal degree in co-relation 3736. Up to 366 conditions per place. [2024-01-31 16:50:07,211 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 101 selfloop transitions, 33 changer transitions 10/147 dead transitions. [2024-01-31 16:50:07,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 147 transitions, 998 flow [2024-01-31 16:50:07,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:50:07,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:50:07,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 177 transitions. [2024-01-31 16:50:07,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36122448979591837 [2024-01-31 16:50:07,213 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 403 flow. Second operand 14 states and 177 transitions. [2024-01-31 16:50:07,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 147 transitions, 998 flow [2024-01-31 16:50:07,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 147 transitions, 929 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-01-31 16:50:07,220 INFO L231 Difference]: Finished difference. Result has 77 places, 85 transitions, 551 flow [2024-01-31 16:50:07,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=551, PETRI_PLACES=77, PETRI_TRANSITIONS=85} [2024-01-31 16:50:07,221 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 46 predicate places. [2024-01-31 16:50:07,221 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 85 transitions, 551 flow [2024-01-31 16:50:07,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 23 states have internal predecessors, (179), 0 states have call successors, (0), 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 16:50:07,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:07,222 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:07,249 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 16:50:07,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:07,435 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 16:50:07,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:07,435 INFO L85 PathProgramCache]: Analyzing trace with hash -873289937, now seen corresponding path program 3 times [2024-01-31 16:50:07,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:07,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950047067] [2024-01-31 16:50:07,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:07,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:07,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:10,153 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:10,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:10,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950047067] [2024-01-31 16:50:10,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950047067] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:10,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974308011] [2024-01-31 16:50:10,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:50:10,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:10,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:10,168 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 16:50:10,211 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 16:50:10,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:50:10,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:50:10,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 55 conjunts are in the unsatisfiable core [2024-01-31 16:50:10,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:11,412 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:50:11,412 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 325 treesize of output 269 [2024-01-31 16:50:12,285 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:12,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:14,241 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:50:14,241 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 435 treesize of output 401 [2024-01-31 16:50:15,565 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:15,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974308011] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:15,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:15,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2024-01-31 16:50:15,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502615874] [2024-01-31 16:50:15,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:15,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:50:15,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:15,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:50:15,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:50:15,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:50:15,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 85 transitions, 551 flow. Second operand has 23 states, 23 states have (on average 7.826086956521739) internal successors, (180), 23 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 16:50:15,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:15,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:50:15,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:17,055 INFO L124 PetriNetUnfolderBase]: 763/1501 cut-off events. [2024-01-31 16:50:17,056 INFO L125 PetriNetUnfolderBase]: For 2504/2504 co-relation queries the response was YES. [2024-01-31 16:50:17,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4328 conditions, 1501 events. 763/1501 cut-off events. For 2504/2504 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8630 event pairs, 137 based on Foata normal form. 2/1499 useless extension candidates. Maximal degree in co-relation 4256. Up to 362 conditions per place. [2024-01-31 16:50:17,064 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 98 selfloop transitions, 45 changer transitions 22/168 dead transitions. [2024-01-31 16:50:17,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 168 transitions, 1150 flow [2024-01-31 16:50:17,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-31 16:50:17,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-31 16:50:17,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 219 transitions. [2024-01-31 16:50:17,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3476190476190476 [2024-01-31 16:50:17,067 INFO L175 Difference]: Start difference. First operand has 77 places, 85 transitions, 551 flow. Second operand 18 states and 219 transitions. [2024-01-31 16:50:17,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 168 transitions, 1150 flow [2024-01-31 16:50:17,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 168 transitions, 1131 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-01-31 16:50:17,080 INFO L231 Difference]: Finished difference. Result has 96 places, 92 transitions, 707 flow [2024-01-31 16:50:17,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=707, PETRI_PLACES=96, PETRI_TRANSITIONS=92} [2024-01-31 16:50:17,080 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 65 predicate places. [2024-01-31 16:50:17,080 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 92 transitions, 707 flow [2024-01-31 16:50:17,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.826086956521739) internal successors, (180), 23 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 16:50:17,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:17,081 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:17,093 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 16:50:17,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:17,294 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 16:50:17,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:17,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1485809137, now seen corresponding path program 4 times [2024-01-31 16:50:17,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:17,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420621839] [2024-01-31 16:50:17,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:17,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:17,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:19,669 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:19,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:19,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420621839] [2024-01-31 16:50:19,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420621839] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:19,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264996014] [2024-01-31 16:50:19,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:50:19,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:19,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:19,685 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 16:50:19,692 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 16:50:19,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:50:19,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:50:19,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 57 conjunts are in the unsatisfiable core [2024-01-31 16:50:19,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:20,772 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:50:20,772 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 346 treesize of output 290 [2024-01-31 16:50:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-31 16:50:21,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:23,645 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:50:23,646 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 402 treesize of output 368 [2024-01-31 16:50:24,515 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:24,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264996014] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:24,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:24,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 8] total 25 [2024-01-31 16:50:24,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894110634] [2024-01-31 16:50:24,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:24,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 16:50:24,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:24,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 16:50:24,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2024-01-31 16:50:24,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:50:24,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 92 transitions, 707 flow. Second operand has 25 states, 25 states have (on average 7.96) internal successors, (199), 25 states have internal predecessors, (199), 0 states have call successors, (0), 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 16:50:24,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:24,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:50:24,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:26,201 INFO L124 PetriNetUnfolderBase]: 923/1816 cut-off events. [2024-01-31 16:50:26,201 INFO L125 PetriNetUnfolderBase]: For 4787/4787 co-relation queries the response was YES. [2024-01-31 16:50:26,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5746 conditions, 1816 events. 923/1816 cut-off events. For 4787/4787 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11217 event pairs, 245 based on Foata normal form. 2/1802 useless extension candidates. Maximal degree in co-relation 5670. Up to 658 conditions per place. [2024-01-31 16:50:26,208 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 115 selfloop transitions, 55 changer transitions 30/203 dead transitions. [2024-01-31 16:50:26,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 203 transitions, 1588 flow [2024-01-31 16:50:26,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-31 16:50:26,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-31 16:50:26,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 243 transitions. [2024-01-31 16:50:26,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3306122448979592 [2024-01-31 16:50:26,210 INFO L175 Difference]: Start difference. First operand has 96 places, 92 transitions, 707 flow. Second operand 21 states and 243 transitions. [2024-01-31 16:50:26,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 203 transitions, 1588 flow [2024-01-31 16:50:26,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 203 transitions, 1511 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-01-31 16:50:26,221 INFO L231 Difference]: Finished difference. Result has 112 places, 115 transitions, 998 flow [2024-01-31 16:50:26,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=998, PETRI_PLACES=112, PETRI_TRANSITIONS=115} [2024-01-31 16:50:26,222 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 81 predicate places. [2024-01-31 16:50:26,222 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 115 transitions, 998 flow [2024-01-31 16:50:26,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.96) internal successors, (199), 25 states have internal predecessors, (199), 0 states have call successors, (0), 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 16:50:26,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:26,222 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:26,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-01-31 16:50:26,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-01-31 16:50:26,425 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 16:50:26,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:26,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1579390353, now seen corresponding path program 5 times [2024-01-31 16:50:26,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:26,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983819922] [2024-01-31 16:50:26,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:26,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:29,080 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:29,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:29,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983819922] [2024-01-31 16:50:29,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983819922] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:29,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091940124] [2024-01-31 16:50:29,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:50:29,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:29,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:29,082 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 16:50:29,120 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 16:50:29,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:50:29,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:50:29,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 49 conjunts are in the unsatisfiable core [2024-01-31 16:50:29,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:30,152 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:50:30,152 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 326 treesize of output 278 [2024-01-31 16:50:30,944 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:30,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:32,933 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-31 16:50:32,933 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 335 treesize of output 308 [2024-01-31 16:50:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:33,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091940124] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:33,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:33,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 24 [2024-01-31 16:50:33,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774509153] [2024-01-31 16:50:33,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:33,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 16:50:33,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:33,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 16:50:33,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:50:33,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:50:33,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 115 transitions, 998 flow. Second operand has 24 states, 24 states have (on average 8.041666666666666) internal successors, (193), 24 states have internal predecessors, (193), 0 states have call successors, (0), 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 16:50:33,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:33,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:50:33,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:36,406 INFO L124 PetriNetUnfolderBase]: 1197/2368 cut-off events. [2024-01-31 16:50:36,406 INFO L125 PetriNetUnfolderBase]: For 9424/9424 co-relation queries the response was YES. [2024-01-31 16:50:36,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8111 conditions, 2368 events. 1197/2368 cut-off events. For 9424/9424 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15512 event pairs, 241 based on Foata normal form. 2/2362 useless extension candidates. Maximal degree in co-relation 8026. Up to 480 conditions per place. [2024-01-31 16:50:36,420 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 143 selfloop transitions, 74 changer transitions 26/246 dead transitions. [2024-01-31 16:50:36,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 246 transitions, 2146 flow [2024-01-31 16:50:36,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-31 16:50:36,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-31 16:50:36,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 279 transitions. [2024-01-31 16:50:36,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34658385093167704 [2024-01-31 16:50:36,423 INFO L175 Difference]: Start difference. First operand has 112 places, 115 transitions, 998 flow. Second operand 23 states and 279 transitions. [2024-01-31 16:50:36,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 246 transitions, 2146 flow [2024-01-31 16:50:36,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 246 transitions, 1993 flow, removed 57 selfloop flow, removed 9 redundant places. [2024-01-31 16:50:36,449 INFO L231 Difference]: Finished difference. Result has 128 places, 135 transitions, 1304 flow [2024-01-31 16:50:36,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1304, PETRI_PLACES=128, PETRI_TRANSITIONS=135} [2024-01-31 16:50:36,450 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 97 predicate places. [2024-01-31 16:50:36,450 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 135 transitions, 1304 flow [2024-01-31 16:50:36,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.041666666666666) internal successors, (193), 24 states have internal predecessors, (193), 0 states have call successors, (0), 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 16:50:36,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:36,451 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:36,475 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 16:50:36,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-01-31 16:50:36,663 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 16:50:36,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:36,664 INFO L85 PathProgramCache]: Analyzing trace with hash 535674757, now seen corresponding path program 6 times [2024-01-31 16:50:36,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:36,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117864447] [2024-01-31 16:50:36,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:36,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:38,983 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:38,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:38,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117864447] [2024-01-31 16:50:38,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117864447] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:38,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758328884] [2024-01-31 16:50:38,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:50:38,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:38,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:38,986 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 16:50:38,987 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 16:50:39,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 16:50:39,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:50:39,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 53 conjunts are in the unsatisfiable core [2024-01-31 16:50:39,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:40,043 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:50:40,043 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 346 treesize of output 286 [2024-01-31 16:50:40,806 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:40,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:42,860 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:50:42,861 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 402 treesize of output 368 [2024-01-31 16:50:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:43,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758328884] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:43,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:43,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2024-01-31 16:50:43,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954134369] [2024-01-31 16:50:43,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:43,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:50:43,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:43,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:50:43,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:50:43,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:50:43,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 135 transitions, 1304 flow. Second operand has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 23 states have internal predecessors, (179), 0 states have call successors, (0), 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 16:50:43,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:43,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:50:43,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:45,227 INFO L124 PetriNetUnfolderBase]: 1243/2489 cut-off events. [2024-01-31 16:50:45,227 INFO L125 PetriNetUnfolderBase]: For 11546/11546 co-relation queries the response was YES. [2024-01-31 16:50:45,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8734 conditions, 2489 events. 1243/2489 cut-off events. For 11546/11546 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 16499 event pairs, 367 based on Foata normal form. 2/2485 useless extension candidates. Maximal degree in co-relation 8649. Up to 906 conditions per place. [2024-01-31 16:50:45,242 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 158 selfloop transitions, 59 changer transitions 17/237 dead transitions. [2024-01-31 16:50:45,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 237 transitions, 2260 flow [2024-01-31 16:50:45,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 16:50:45,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 16:50:45,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 221 transitions. [2024-01-31 16:50:45,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-01-31 16:50:45,243 INFO L175 Difference]: Start difference. First operand has 128 places, 135 transitions, 1304 flow. Second operand 17 states and 221 transitions. [2024-01-31 16:50:45,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 237 transitions, 2260 flow [2024-01-31 16:50:45,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 237 transitions, 2082 flow, removed 65 selfloop flow, removed 10 redundant places. [2024-01-31 16:50:45,271 INFO L231 Difference]: Finished difference. Result has 138 places, 143 transitions, 1412 flow [2024-01-31 16:50:45,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1412, PETRI_PLACES=138, PETRI_TRANSITIONS=143} [2024-01-31 16:50:45,271 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 107 predicate places. [2024-01-31 16:50:45,272 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 143 transitions, 1412 flow [2024-01-31 16:50:45,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 23 states have internal predecessors, (179), 0 states have call successors, (0), 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 16:50:45,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:45,272 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:45,296 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 16:50:45,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-31 16:50:45,500 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 16:50:45,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:45,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1738974457, now seen corresponding path program 7 times [2024-01-31 16:50:45,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:45,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112271292] [2024-01-31 16:50:45,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:45,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:46,755 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:46,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:46,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112271292] [2024-01-31 16:50:46,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112271292] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:46,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861441449] [2024-01-31 16:50:46,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:50:46,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:46,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:46,780 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 16:50:46,781 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 16:50:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:46,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:50:46,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:47,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:47,700 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-31 16:50:47,700 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 44 treesize of output 75 [2024-01-31 16:50:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:47,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861441449] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:47,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:47,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 20 [2024-01-31 16:50:47,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265437151] [2024-01-31 16:50:47,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:47,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:50:47,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:47,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:50:47,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:50:47,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:50:47,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 143 transitions, 1412 flow. Second operand has 20 states, 20 states have (on average 8.15) internal successors, (163), 20 states have internal predecessors, (163), 0 states have call successors, (0), 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 16:50:47,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:47,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:50:47,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:48,935 INFO L124 PetriNetUnfolderBase]: 1293/2590 cut-off events. [2024-01-31 16:50:48,936 INFO L125 PetriNetUnfolderBase]: For 11764/11764 co-relation queries the response was YES. [2024-01-31 16:50:48,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9091 conditions, 2590 events. 1293/2590 cut-off events. For 11764/11764 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 17514 event pairs, 227 based on Foata normal form. 16/2606 useless extension candidates. Maximal degree in co-relation 9002. Up to 595 conditions per place. [2024-01-31 16:50:48,951 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 143 selfloop transitions, 79 changer transitions 11/236 dead transitions. [2024-01-31 16:50:48,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 236 transitions, 2393 flow [2024-01-31 16:50:48,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 16:50:48,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 16:50:48,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 213 transitions. [2024-01-31 16:50:48,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35798319327731093 [2024-01-31 16:50:48,953 INFO L175 Difference]: Start difference. First operand has 138 places, 143 transitions, 1412 flow. Second operand 17 states and 213 transitions. [2024-01-31 16:50:48,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 236 transitions, 2393 flow [2024-01-31 16:50:48,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 236 transitions, 2286 flow, removed 27 selfloop flow, removed 10 redundant places. [2024-01-31 16:50:48,977 INFO L231 Difference]: Finished difference. Result has 146 places, 151 transitions, 1584 flow [2024-01-31 16:50:48,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1308, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1584, PETRI_PLACES=146, PETRI_TRANSITIONS=151} [2024-01-31 16:50:48,977 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 115 predicate places. [2024-01-31 16:50:48,977 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 151 transitions, 1584 flow [2024-01-31 16:50:48,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.15) internal successors, (163), 20 states have internal predecessors, (163), 0 states have call successors, (0), 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 16:50:48,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:48,978 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:48,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-01-31 16:50:49,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-31 16:50:49,187 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 16:50:49,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:49,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1737070617, now seen corresponding path program 8 times [2024-01-31 16:50:49,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:49,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752368583] [2024-01-31 16:50:49,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:49,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:49,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:50,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:50,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752368583] [2024-01-31 16:50:50,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752368583] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:50,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112772560] [2024-01-31 16:50:50,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:50:50,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:50,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:50,399 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 16:50:50,401 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 16:50:50,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:50:50,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:50:50,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-31 16:50:50,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:50,940 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:50,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:51,526 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-31 16:50:51,527 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 44 treesize of output 75 [2024-01-31 16:50:51,588 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:51,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112772560] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:51,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:51,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-01-31 16:50:51,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388564159] [2024-01-31 16:50:51,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:51,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:50:51,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:51,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:50:51,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:50:51,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:50:51,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 151 transitions, 1584 flow. Second operand has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 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 16:50:51,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:51,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:50:51,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:52,558 INFO L124 PetriNetUnfolderBase]: 1401/2798 cut-off events. [2024-01-31 16:50:52,558 INFO L125 PetriNetUnfolderBase]: For 14802/14802 co-relation queries the response was YES. [2024-01-31 16:50:52,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10232 conditions, 2798 events. 1401/2798 cut-off events. For 14802/14802 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 19321 event pairs, 269 based on Foata normal form. 16/2814 useless extension candidates. Maximal degree in co-relation 10143. Up to 1123 conditions per place. [2024-01-31 16:50:52,573 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 140 selfloop transitions, 68 changer transitions 10/221 dead transitions. [2024-01-31 16:50:52,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 221 transitions, 2453 flow [2024-01-31 16:50:52,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 16:50:52,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 16:50:52,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 177 transitions. [2024-01-31 16:50:52,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33714285714285713 [2024-01-31 16:50:52,575 INFO L175 Difference]: Start difference. First operand has 146 places, 151 transitions, 1584 flow. Second operand 15 states and 177 transitions. [2024-01-31 16:50:52,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 221 transitions, 2453 flow [2024-01-31 16:50:52,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 221 transitions, 2333 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-01-31 16:50:52,604 INFO L231 Difference]: Finished difference. Result has 155 places, 162 transitions, 1813 flow [2024-01-31 16:50:52,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1498, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1813, PETRI_PLACES=155, PETRI_TRANSITIONS=162} [2024-01-31 16:50:52,605 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 124 predicate places. [2024-01-31 16:50:52,605 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 162 transitions, 1813 flow [2024-01-31 16:50:52,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 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 16:50:52,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:52,605 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:52,617 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 16:50:52,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-31 16:50:52,817 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 16:50:52,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:52,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1905067541, now seen corresponding path program 9 times [2024-01-31 16:50:52,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:52,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301470491] [2024-01-31 16:50:52,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:52,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:54,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:54,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301470491] [2024-01-31 16:50:54,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301470491] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:54,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564042728] [2024-01-31 16:50:54,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:50:54,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:54,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:54,085 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 16:50:54,086 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 16:50:54,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-31 16:50:54,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:50:54,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-31 16:50:54,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:54,679 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:50:54,679 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 157 treesize of output 137 [2024-01-31 16:50:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:54,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:55,492 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-31 16:50:55,492 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 44 treesize of output 75 [2024-01-31 16:50:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:55,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564042728] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:55,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:55,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-01-31 16:50:55,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397162357] [2024-01-31 16:50:55,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:55,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:50:55,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:55,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:50:55,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:50:55,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:50:55,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 162 transitions, 1813 flow. Second operand has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 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 16:50:55,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:55,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:50:55,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:56,880 INFO L124 PetriNetUnfolderBase]: 1549/3097 cut-off events. [2024-01-31 16:50:56,881 INFO L125 PetriNetUnfolderBase]: For 17805/17805 co-relation queries the response was YES. [2024-01-31 16:50:56,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11643 conditions, 3097 events. 1549/3097 cut-off events. For 17805/17805 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 21883 event pairs, 229 based on Foata normal form. 10/3107 useless extension candidates. Maximal degree in co-relation 11553. Up to 1030 conditions per place. [2024-01-31 16:50:56,898 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 148 selfloop transitions, 89 changer transitions 15/255 dead transitions. [2024-01-31 16:50:56,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 255 transitions, 2883 flow [2024-01-31 16:50:56,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-31 16:50:56,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-31 16:50:56,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 214 transitions. [2024-01-31 16:50:56,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3396825396825397 [2024-01-31 16:50:56,900 INFO L175 Difference]: Start difference. First operand has 155 places, 162 transitions, 1813 flow. Second operand 18 states and 214 transitions. [2024-01-31 16:50:56,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 255 transitions, 2883 flow [2024-01-31 16:50:56,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 255 transitions, 2784 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-01-31 16:50:56,937 INFO L231 Difference]: Finished difference. Result has 168 places, 176 transitions, 2167 flow [2024-01-31 16:50:56,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1735, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2167, PETRI_PLACES=168, PETRI_TRANSITIONS=176} [2024-01-31 16:50:56,938 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 137 predicate places. [2024-01-31 16:50:56,938 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 176 transitions, 2167 flow [2024-01-31 16:50:56,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 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 16:50:56,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:56,938 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:56,950 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 16:50:57,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-31 16:50:57,151 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 16:50:57,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:57,151 INFO L85 PathProgramCache]: Analyzing trace with hash 208924117, now seen corresponding path program 10 times [2024-01-31 16:50:57,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:57,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770480403] [2024-01-31 16:50:57,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:57,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:58,383 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:58,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:58,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770480403] [2024-01-31 16:50:58,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770480403] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:58,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140669339] [2024-01-31 16:50:58,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:50:58,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:58,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:58,385 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 16:50:58,388 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 16:50:58,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:50:58,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:50:58,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 16:50:58,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:58,869 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:50:58,870 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 157 treesize of output 141 [2024-01-31 16:50:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:59,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:59,653 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-31 16:50:59,653 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 44 treesize of output 75 [2024-01-31 16:50:59,711 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:59,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140669339] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:59,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:59,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-01-31 16:50:59,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004860377] [2024-01-31 16:50:59,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:59,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:50:59,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:59,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:50:59,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:50:59,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:50:59,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 176 transitions, 2167 flow. Second operand has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 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 16:50:59,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:59,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:50:59,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:51:00,902 INFO L124 PetriNetUnfolderBase]: 1525/3041 cut-off events. [2024-01-31 16:51:00,902 INFO L125 PetriNetUnfolderBase]: For 20435/20435 co-relation queries the response was YES. [2024-01-31 16:51:00,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12128 conditions, 3041 events. 1525/3041 cut-off events. For 20435/20435 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 21485 event pairs, 249 based on Foata normal form. 4/3045 useless extension candidates. Maximal degree in co-relation 12034. Up to 1080 conditions per place. [2024-01-31 16:51:00,942 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 134 selfloop transitions, 82 changer transitions 12/231 dead transitions. [2024-01-31 16:51:00,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 231 transitions, 2943 flow [2024-01-31 16:51:00,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:51:00,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:51:00,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 163 transitions. [2024-01-31 16:51:00,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3326530612244898 [2024-01-31 16:51:00,943 INFO L175 Difference]: Start difference. First operand has 168 places, 176 transitions, 2167 flow. Second operand 14 states and 163 transitions. [2024-01-31 16:51:00,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 231 transitions, 2943 flow [2024-01-31 16:51:01,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 231 transitions, 2834 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-01-31 16:51:01,039 INFO L231 Difference]: Finished difference. Result has 172 places, 176 transitions, 2293 flow [2024-01-31 16:51:01,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2033, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2293, PETRI_PLACES=172, PETRI_TRANSITIONS=176} [2024-01-31 16:51:01,040 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 141 predicate places. [2024-01-31 16:51:01,040 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 176 transitions, 2293 flow [2024-01-31 16:51:01,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 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 16:51:01,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:51:01,041 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:51:01,070 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 16:51:01,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:01,241 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 16:51:01,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:51:01,242 INFO L85 PathProgramCache]: Analyzing trace with hash 2014297749, now seen corresponding path program 11 times [2024-01-31 16:51:01,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:51:01,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026830403] [2024-01-31 16:51:01,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:51:01,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:51:01,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:02,694 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:02,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:51:02,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026830403] [2024-01-31 16:51:02,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026830403] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:51:02,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381602025] [2024-01-31 16:51:02,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:51:02,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:02,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:51:02,696 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 16:51:02,697 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 16:51:03,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:51:03,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:51:03,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-31 16:51:03,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:51:03,301 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:03,302 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 157 treesize of output 141 [2024-01-31 16:51:03,531 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:03,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:51:04,018 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:04,019 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 51 treesize of output 95 [2024-01-31 16:51:04,097 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:04,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381602025] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:51:04,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:51:04,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-01-31 16:51:04,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790681540] [2024-01-31 16:51:04,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:51:04,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:51:04,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:51:04,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:51:04,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:51:04,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:51:04,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 176 transitions, 2293 flow. Second operand has 21 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 21 states have internal predecessors, (167), 0 states have call successors, (0), 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 16:51:04,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:51:04,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:51:04,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:51:05,335 INFO L124 PetriNetUnfolderBase]: 1661/3309 cut-off events. [2024-01-31 16:51:05,335 INFO L125 PetriNetUnfolderBase]: For 27269/27269 co-relation queries the response was YES. [2024-01-31 16:51:05,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13543 conditions, 3309 events. 1661/3309 cut-off events. For 27269/27269 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 23676 event pairs, 333 based on Foata normal form. 10/3315 useless extension candidates. Maximal degree in co-relation 13447. Up to 818 conditions per place. [2024-01-31 16:51:05,354 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 160 selfloop transitions, 103 changer transitions 11/277 dead transitions. [2024-01-31 16:51:05,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 277 transitions, 3489 flow [2024-01-31 16:51:05,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 16:51:05,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 16:51:05,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 235 transitions. [2024-01-31 16:51:05,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3533834586466165 [2024-01-31 16:51:05,356 INFO L175 Difference]: Start difference. First operand has 172 places, 176 transitions, 2293 flow. Second operand 19 states and 235 transitions. [2024-01-31 16:51:05,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 277 transitions, 3489 flow [2024-01-31 16:51:05,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 277 transitions, 3396 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-01-31 16:51:05,399 INFO L231 Difference]: Finished difference. Result has 184 places, 191 transitions, 2772 flow [2024-01-31 16:51:05,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2206, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2772, PETRI_PLACES=184, PETRI_TRANSITIONS=191} [2024-01-31 16:51:05,400 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 153 predicate places. [2024-01-31 16:51:05,400 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 191 transitions, 2772 flow [2024-01-31 16:51:05,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 21 states have internal predecessors, (167), 0 states have call successors, (0), 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 16:51:05,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:51:05,400 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:51:05,421 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 16:51:05,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:05,613 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 16:51:05,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:51:05,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1799586685, now seen corresponding path program 12 times [2024-01-31 16:51:05,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:51:05,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101210187] [2024-01-31 16:51:05,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:51:05,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:51:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:06,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:51:06,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101210187] [2024-01-31 16:51:06,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101210187] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:51:06,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870904144] [2024-01-31 16:51:06,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:51:06,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:06,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:51:06,893 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 16:51:06,915 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 16:51:07,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 16:51:07,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:51:07,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 16:51:07,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:51:07,673 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:07,674 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 182 treesize of output 154 [2024-01-31 16:51:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:07,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:51:08,312 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:08,312 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 168 treesize of output 194 [2024-01-31 16:51:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:08,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870904144] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:51:08,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:51:08,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-01-31 16:51:08,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098178611] [2024-01-31 16:51:08,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:51:08,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:51:08,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:51:08,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:51:08,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:51:08,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:51:08,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 191 transitions, 2772 flow. Second operand has 20 states, 20 states have (on average 7.7) internal successors, (154), 20 states have internal predecessors, (154), 0 states have call successors, (0), 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 16:51:08,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:51:08,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:51:08,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:51:09,733 INFO L124 PetriNetUnfolderBase]: 1725/3449 cut-off events. [2024-01-31 16:51:09,733 INFO L125 PetriNetUnfolderBase]: For 36198/36198 co-relation queries the response was YES. [2024-01-31 16:51:09,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14699 conditions, 3449 events. 1725/3449 cut-off events. For 36198/36198 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 24923 event pairs, 399 based on Foata normal form. 10/3451 useless extension candidates. Maximal degree in co-relation 14597. Up to 890 conditions per place. [2024-01-31 16:51:09,753 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 147 selfloop transitions, 107 changer transitions 13/270 dead transitions. [2024-01-31 16:51:09,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 270 transitions, 3826 flow [2024-01-31 16:51:09,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 16:51:09,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 16:51:09,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 197 transitions. [2024-01-31 16:51:09,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37523809523809526 [2024-01-31 16:51:09,755 INFO L175 Difference]: Start difference. First operand has 184 places, 191 transitions, 2772 flow. Second operand 15 states and 197 transitions. [2024-01-31 16:51:09,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 270 transitions, 3826 flow [2024-01-31 16:51:09,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 270 transitions, 3595 flow, removed 67 selfloop flow, removed 9 redundant places. [2024-01-31 16:51:09,875 INFO L231 Difference]: Finished difference. Result has 192 places, 195 transitions, 2920 flow [2024-01-31 16:51:09,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2541, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2920, PETRI_PLACES=192, PETRI_TRANSITIONS=195} [2024-01-31 16:51:09,875 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 161 predicate places. [2024-01-31 16:51:09,875 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 195 transitions, 2920 flow [2024-01-31 16:51:09,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.7) internal successors, (154), 20 states have internal predecessors, (154), 0 states have call successors, (0), 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 16:51:09,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:51:09,876 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:51:09,888 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 16:51:10,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:10,089 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 16:51:10,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:51:10,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1480645829, now seen corresponding path program 13 times [2024-01-31 16:51:10,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:51:10,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349066328] [2024-01-31 16:51:10,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:51:10,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:51:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:11,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:51:11,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349066328] [2024-01-31 16:51:11,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349066328] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:51:11,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836877144] [2024-01-31 16:51:11,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:51:11,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:11,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:51:11,206 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 16:51:11,208 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 16:51:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:11,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:51:11,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:51:11,728 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:11,729 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 157 treesize of output 141 [2024-01-31 16:51:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:11,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:51:12,501 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:12,501 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 51 treesize of output 95 [2024-01-31 16:51:12,573 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:12,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836877144] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:51:12,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:51:12,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-01-31 16:51:12,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946103853] [2024-01-31 16:51:12,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:51:12,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:51:12,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:51:12,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:51:12,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:51:12,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:51:12,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 195 transitions, 2920 flow. Second operand has 20 states, 20 states have (on average 7.7) internal successors, (154), 20 states have internal predecessors, (154), 0 states have call successors, (0), 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 16:51:12,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:51:12,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:51:12,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:51:13,861 INFO L124 PetriNetUnfolderBase]: 1677/3353 cut-off events. [2024-01-31 16:51:13,862 INFO L125 PetriNetUnfolderBase]: For 35056/35056 co-relation queries the response was YES. [2024-01-31 16:51:13,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14551 conditions, 3353 events. 1677/3353 cut-off events. For 35056/35056 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 24224 event pairs, 375 based on Foata normal form. 8/3357 useless extension candidates. Maximal degree in co-relation 14448. Up to 906 conditions per place. [2024-01-31 16:51:13,879 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 158 selfloop transitions, 94 changer transitions 8/263 dead transitions. [2024-01-31 16:51:13,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 263 transitions, 3769 flow [2024-01-31 16:51:13,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 16:51:13,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 16:51:13,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 197 transitions. [2024-01-31 16:51:13,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3517857142857143 [2024-01-31 16:51:13,881 INFO L175 Difference]: Start difference. First operand has 192 places, 195 transitions, 2920 flow. Second operand 16 states and 197 transitions. [2024-01-31 16:51:13,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 263 transitions, 3769 flow [2024-01-31 16:51:13,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 263 transitions, 3639 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-01-31 16:51:13,943 INFO L231 Difference]: Finished difference. Result has 200 places, 191 transitions, 2923 flow [2024-01-31 16:51:13,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2751, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2923, PETRI_PLACES=200, PETRI_TRANSITIONS=191} [2024-01-31 16:51:13,944 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 169 predicate places. [2024-01-31 16:51:13,944 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 191 transitions, 2923 flow [2024-01-31 16:51:13,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.7) internal successors, (154), 20 states have internal predecessors, (154), 0 states have call successors, (0), 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 16:51:13,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:51:13,944 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:51:13,958 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 16:51:14,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:14,157 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 16:51:14,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:51:14,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1421170405, now seen corresponding path program 14 times [2024-01-31 16:51:14,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:51:14,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446178516] [2024-01-31 16:51:14,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:51:14,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:51:14,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:15,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:51:15,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446178516] [2024-01-31 16:51:15,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446178516] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:51:15,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245348627] [2024-01-31 16:51:15,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:51:15,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:15,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:51:15,366 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 16:51:15,368 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 16:51:15,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:51:15,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:51:15,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-31 16:51:15,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:51:16,136 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:16,137 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 124 treesize of output 108 [2024-01-31 16:51:16,371 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:16,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:51:16,728 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:16,729 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 168 treesize of output 194 [2024-01-31 16:51:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:17,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245348627] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:51:17,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:51:17,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-01-31 16:51:17,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143130731] [2024-01-31 16:51:17,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:51:17,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:51:17,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:51:17,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:51:17,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:51:17,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:51:17,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 191 transitions, 2923 flow. Second operand has 20 states, 20 states have (on average 7.7) internal successors, (154), 20 states have internal predecessors, (154), 0 states have call successors, (0), 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 16:51:17,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:51:17,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:51:17,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:51:18,259 INFO L124 PetriNetUnfolderBase]: 1647/3288 cut-off events. [2024-01-31 16:51:18,260 INFO L125 PetriNetUnfolderBase]: For 36027/36027 co-relation queries the response was YES. [2024-01-31 16:51:18,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14496 conditions, 3288 events. 1647/3288 cut-off events. For 36027/36027 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 23585 event pairs, 363 based on Foata normal form. 4/3284 useless extension candidates. Maximal degree in co-relation 14393. Up to 870 conditions per place. [2024-01-31 16:51:18,280 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 145 selfloop transitions, 100 changer transitions 18/266 dead transitions. [2024-01-31 16:51:18,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 266 transitions, 3862 flow [2024-01-31 16:51:18,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 16:51:18,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 16:51:18,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 200 transitions. [2024-01-31 16:51:18,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-01-31 16:51:18,282 INFO L175 Difference]: Start difference. First operand has 200 places, 191 transitions, 2923 flow. Second operand 16 states and 200 transitions. [2024-01-31 16:51:18,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 266 transitions, 3862 flow [2024-01-31 16:51:18,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 266 transitions, 3784 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-01-31 16:51:18,346 INFO L231 Difference]: Finished difference. Result has 206 places, 190 transitions, 3079 flow [2024-01-31 16:51:18,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2829, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3079, PETRI_PLACES=206, PETRI_TRANSITIONS=190} [2024-01-31 16:51:18,346 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 175 predicate places. [2024-01-31 16:51:18,346 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 190 transitions, 3079 flow [2024-01-31 16:51:18,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.7) internal successors, (154), 20 states have internal predecessors, (154), 0 states have call successors, (0), 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 16:51:18,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:51:18,347 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:51:18,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-01-31 16:51:18,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:18,560 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 16:51:18,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:51:18,560 INFO L85 PathProgramCache]: Analyzing trace with hash -367116261, now seen corresponding path program 15 times [2024-01-31 16:51:18,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:51:18,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898135263] [2024-01-31 16:51:18,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:51:18,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:51:18,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:19,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:51:19,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898135263] [2024-01-31 16:51:19,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898135263] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:51:19,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373529307] [2024-01-31 16:51:19,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:51:19,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:19,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:51:19,767 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 16:51:19,794 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 16:51:20,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:51:20,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:51:20,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 16:51:20,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:51:20,561 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:20,561 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 161 treesize of output 133 [2024-01-31 16:51:20,612 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:20,612 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:51:21,163 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:21,164 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 51 treesize of output 95 [2024-01-31 16:51:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:21,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373529307] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:51:21,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:51:21,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-01-31 16:51:21,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499335579] [2024-01-31 16:51:21,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:51:21,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 16:51:21,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:51:21,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 16:51:21,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-01-31 16:51:21,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:51:21,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 190 transitions, 3079 flow. Second operand has 19 states, 19 states have (on average 7.842105263157895) internal successors, (149), 19 states have internal predecessors, (149), 0 states have call successors, (0), 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 16:51:21,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:51:21,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:51:21,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:51:22,314 INFO L124 PetriNetUnfolderBase]: 1619/3214 cut-off events. [2024-01-31 16:51:22,314 INFO L125 PetriNetUnfolderBase]: For 39418/39418 co-relation queries the response was YES. [2024-01-31 16:51:22,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14682 conditions, 3214 events. 1619/3214 cut-off events. For 39418/39418 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 22942 event pairs, 383 based on Foata normal form. 16/3224 useless extension candidates. Maximal degree in co-relation 14577. Up to 874 conditions per place. [2024-01-31 16:51:22,335 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 143 selfloop transitions, 95 changer transitions 13/254 dead transitions. [2024-01-31 16:51:22,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 254 transitions, 3876 flow [2024-01-31 16:51:22,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 16:51:22,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 16:51:22,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 192 transitions. [2024-01-31 16:51:22,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34285714285714286 [2024-01-31 16:51:22,339 INFO L175 Difference]: Start difference. First operand has 206 places, 190 transitions, 3079 flow. Second operand 16 states and 192 transitions. [2024-01-31 16:51:22,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 254 transitions, 3876 flow [2024-01-31 16:51:22,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 254 transitions, 3741 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-01-31 16:51:22,413 INFO L231 Difference]: Finished difference. Result has 212 places, 189 transitions, 3141 flow [2024-01-31 16:51:22,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2893, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3141, PETRI_PLACES=212, PETRI_TRANSITIONS=189} [2024-01-31 16:51:22,413 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 181 predicate places. [2024-01-31 16:51:22,414 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 189 transitions, 3141 flow [2024-01-31 16:51:22,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.842105263157895) internal successors, (149), 19 states have internal predecessors, (149), 0 states have call successors, (0), 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 16:51:22,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:51:22,414 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:51:22,427 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 16:51:22,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:22,626 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 16:51:22,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:51:22,627 INFO L85 PathProgramCache]: Analyzing trace with hash -562169839, now seen corresponding path program 16 times [2024-01-31 16:51:22,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:51:22,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518730096] [2024-01-31 16:51:22,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:51:22,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:51:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:23,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:51:23,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518730096] [2024-01-31 16:51:23,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518730096] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:51:23,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787634097] [2024-01-31 16:51:23,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:51:23,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:23,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:51:23,826 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 16:51:23,828 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 16:51:24,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:51:24,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:51:24,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 16:51:24,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:51:24,551 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:24,552 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 92 treesize of output 88 [2024-01-31 16:51:24,615 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:24,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:51:24,965 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:24,966 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 168 treesize of output 194 [2024-01-31 16:51:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:25,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787634097] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:51:25,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:51:25,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-01-31 16:51:25,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998176056] [2024-01-31 16:51:25,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:51:25,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:51:25,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:51:25,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:51:25,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:51:25,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:51:25,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 189 transitions, 3141 flow. Second operand has 20 states, 20 states have (on average 7.5) internal successors, (150), 20 states have internal predecessors, (150), 0 states have call successors, (0), 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 16:51:25,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:51:25,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:51:25,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:51:26,400 INFO L124 PetriNetUnfolderBase]: 1585/3144 cut-off events. [2024-01-31 16:51:26,401 INFO L125 PetriNetUnfolderBase]: For 40737/40737 co-relation queries the response was YES. [2024-01-31 16:51:26,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14653 conditions, 3144 events. 1585/3144 cut-off events. For 40737/40737 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 22237 event pairs, 365 based on Foata normal form. 4/3140 useless extension candidates. Maximal degree in co-relation 14548. Up to 969 conditions per place. [2024-01-31 16:51:26,419 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 126 selfloop transitions, 88 changer transitions 19/236 dead transitions. [2024-01-31 16:51:26,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 236 transitions, 3869 flow [2024-01-31 16:51:26,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:51:26,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:51:26,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 147 transitions. [2024-01-31 16:51:26,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-01-31 16:51:26,421 INFO L175 Difference]: Start difference. First operand has 212 places, 189 transitions, 3141 flow. Second operand 12 states and 147 transitions. [2024-01-31 16:51:26,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 236 transitions, 3869 flow [2024-01-31 16:51:26,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 236 transitions, 3806 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-01-31 16:51:26,494 INFO L231 Difference]: Finished difference. Result has 208 places, 186 transitions, 3210 flow [2024-01-31 16:51:26,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3066, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3210, PETRI_PLACES=208, PETRI_TRANSITIONS=186} [2024-01-31 16:51:26,494 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 177 predicate places. [2024-01-31 16:51:26,495 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 186 transitions, 3210 flow [2024-01-31 16:51:26,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.5) internal successors, (150), 20 states have internal predecessors, (150), 0 states have call successors, (0), 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 16:51:26,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:51:26,495 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:51:26,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-01-31 16:51:26,702 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,SelfDestructingSolverStorable23 [2024-01-31 16:51:26,703 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 16:51:26,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:51:26,703 INFO L85 PathProgramCache]: Analyzing trace with hash -667872600, now seen corresponding path program 17 times [2024-01-31 16:51:26,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:51:26,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507899938] [2024-01-31 16:51:26,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:51:26,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:51:26,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:27,888 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:27,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:51:27,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507899938] [2024-01-31 16:51:27,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507899938] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:51:27,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410879805] [2024-01-31 16:51:27,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:51:27,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:27,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:51:27,890 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 16:51:27,891 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 16:51:28,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:51:28,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:51:28,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 16:51:28,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:51:28,769 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:28,770 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 184 treesize of output 160 [2024-01-31 16:51:29,024 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:29,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:51:29,446 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-31 16:51:29,446 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 164 treesize of output 177 [2024-01-31 16:51:29,791 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:29,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410879805] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:51:29,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:51:29,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-01-31 16:51:29,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362675300] [2024-01-31 16:51:29,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:51:29,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:51:29,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:51:29,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:51:29,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:51:29,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:51:29,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 186 transitions, 3210 flow. Second operand has 21 states, 21 states have (on average 8.142857142857142) internal successors, (171), 21 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 16:51:29,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:51:29,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:51:29,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:51:31,234 INFO L124 PetriNetUnfolderBase]: 1631/3244 cut-off events. [2024-01-31 16:51:31,235 INFO L125 PetriNetUnfolderBase]: For 44955/44955 co-relation queries the response was YES. [2024-01-31 16:51:31,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15332 conditions, 3244 events. 1631/3244 cut-off events. For 44955/44955 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 23165 event pairs, 417 based on Foata normal form. 8/3250 useless extension candidates. Maximal degree in co-relation 15229. Up to 990 conditions per place. [2024-01-31 16:51:31,254 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 174 selfloop transitions, 79 changer transitions 8/264 dead transitions. [2024-01-31 16:51:31,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 264 transitions, 4146 flow [2024-01-31 16:51:31,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 16:51:31,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 16:51:31,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 193 transitions. [2024-01-31 16:51:31,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3676190476190476 [2024-01-31 16:51:31,255 INFO L175 Difference]: Start difference. First operand has 208 places, 186 transitions, 3210 flow. Second operand 15 states and 193 transitions. [2024-01-31 16:51:31,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 264 transitions, 4146 flow [2024-01-31 16:51:31,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 264 transitions, 3986 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-01-31 16:51:31,319 INFO L231 Difference]: Finished difference. Result has 210 places, 188 transitions, 3246 flow [2024-01-31 16:51:31,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3055, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3246, PETRI_PLACES=210, PETRI_TRANSITIONS=188} [2024-01-31 16:51:31,319 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 179 predicate places. [2024-01-31 16:51:31,319 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 188 transitions, 3246 flow [2024-01-31 16:51:31,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.142857142857142) internal successors, (171), 21 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 16:51:31,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:51:31,320 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:51:31,332 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 16:51:31,530 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,SelfDestructingSolverStorable24 [2024-01-31 16:51:31,531 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 16:51:31,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:51:31,531 INFO L85 PathProgramCache]: Analyzing trace with hash -80108516, now seen corresponding path program 18 times [2024-01-31 16:51:31,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:51:31,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12476781] [2024-01-31 16:51:31,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:51:31,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:51:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:32,813 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:32,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:51:32,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12476781] [2024-01-31 16:51:32,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12476781] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:51:32,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793863283] [2024-01-31 16:51:32,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:51:32,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:32,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:51:32,815 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 16:51:32,839 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 16:51:33,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 16:51:33,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:51:33,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 16:51:33,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:51:33,696 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:33,696 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 152 treesize of output 132 [2024-01-31 16:51:33,824 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:33,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:51:34,199 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-31 16:51:34,200 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 164 treesize of output 177 [2024-01-31 16:51:34,516 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:34,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793863283] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:51:34,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:51:34,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-01-31 16:51:34,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558172815] [2024-01-31 16:51:34,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:51:34,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:51:34,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:51:34,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:51:34,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:51:34,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:51:34,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 188 transitions, 3246 flow. Second operand has 20 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 0 states have call successors, (0), 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 16:51:34,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:51:34,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:51:34,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:51:35,466 INFO L124 PetriNetUnfolderBase]: 1649/3286 cut-off events. [2024-01-31 16:51:35,466 INFO L125 PetriNetUnfolderBase]: For 43107/43107 co-relation queries the response was YES. [2024-01-31 16:51:35,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15576 conditions, 3286 events. 1649/3286 cut-off events. For 43107/43107 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 23617 event pairs, 489 based on Foata normal form. 6/3290 useless extension candidates. Maximal degree in co-relation 15474. Up to 990 conditions per place. [2024-01-31 16:51:35,485 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 155 selfloop transitions, 65 changer transitions 16/239 dead transitions. [2024-01-31 16:51:35,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 239 transitions, 4006 flow [2024-01-31 16:51:35,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:51:35,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:51:35,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 133 transitions. [2024-01-31 16:51:35,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-01-31 16:51:35,486 INFO L175 Difference]: Start difference. First operand has 210 places, 188 transitions, 3246 flow. Second operand 10 states and 133 transitions. [2024-01-31 16:51:35,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 239 transitions, 4006 flow [2024-01-31 16:51:35,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 239 transitions, 3789 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-01-31 16:51:35,551 INFO L231 Difference]: Finished difference. Result has 209 places, 187 transitions, 3145 flow [2024-01-31 16:51:35,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3031, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3145, PETRI_PLACES=209, PETRI_TRANSITIONS=187} [2024-01-31 16:51:35,552 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 178 predicate places. [2024-01-31 16:51:35,552 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 187 transitions, 3145 flow [2024-01-31 16:51:35,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 0 states have call successors, (0), 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 16:51:35,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:51:35,552 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:51:35,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-01-31 16:51:35,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-01-31 16:51:35,765 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 16:51:35,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:51:35,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1444747534, now seen corresponding path program 19 times [2024-01-31 16:51:35,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:51:35,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77590540] [2024-01-31 16:51:35,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:51:35,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:51:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:37,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:51:37,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77590540] [2024-01-31 16:51:37,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77590540] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:51:37,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81607576] [2024-01-31 16:51:37,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:51:37,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:37,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:51:37,211 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 16:51:37,212 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 16:51:37,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:37,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 16:51:37,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:51:37,941 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:37,942 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 124 treesize of output 112 [2024-01-31 16:51:38,118 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:38,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:51:38,557 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-31 16:51:38,558 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 164 treesize of output 177 [2024-01-31 16:51:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:38,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81607576] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:51:38,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:51:38,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 21 [2024-01-31 16:51:38,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086274887] [2024-01-31 16:51:38,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:51:38,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:51:38,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:51:38,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:51:38,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:51:38,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:51:38,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 187 transitions, 3145 flow. Second operand has 21 states, 21 states have (on average 7.809523809523809) internal successors, (164), 21 states have internal predecessors, (164), 0 states have call successors, (0), 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 16:51:38,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:51:38,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:51:38,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:51:41,055 INFO L124 PetriNetUnfolderBase]: 1589/3138 cut-off events. [2024-01-31 16:51:41,055 INFO L125 PetriNetUnfolderBase]: For 39460/39460 co-relation queries the response was YES. [2024-01-31 16:51:41,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14932 conditions, 3138 events. 1589/3138 cut-off events. For 39460/39460 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22192 event pairs, 221 based on Foata normal form. 12/3144 useless extension candidates. Maximal degree in co-relation 14828. Up to 592 conditions per place. [2024-01-31 16:51:41,076 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 172 selfloop transitions, 109 changer transitions 29/313 dead transitions. [2024-01-31 16:51:41,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 313 transitions, 4276 flow [2024-01-31 16:51:41,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-31 16:51:41,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-31 16:51:41,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 331 transitions. [2024-01-31 16:51:41,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32610837438423645 [2024-01-31 16:51:41,078 INFO L175 Difference]: Start difference. First operand has 209 places, 187 transitions, 3145 flow. Second operand 29 states and 331 transitions. [2024-01-31 16:51:41,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 313 transitions, 4276 flow [2024-01-31 16:51:41,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 313 transitions, 4167 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-01-31 16:51:41,150 INFO L231 Difference]: Finished difference. Result has 228 places, 192 transitions, 3355 flow [2024-01-31 16:51:41,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2995, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3355, PETRI_PLACES=228, PETRI_TRANSITIONS=192} [2024-01-31 16:51:41,150 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 197 predicate places. [2024-01-31 16:51:41,150 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 192 transitions, 3355 flow [2024-01-31 16:51:41,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.809523809523809) internal successors, (164), 21 states have internal predecessors, (164), 0 states have call successors, (0), 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 16:51:41,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:51:41,151 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:51:41,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-01-31 16:51:41,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:41,366 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 16:51:41,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:51:41,366 INFO L85 PathProgramCache]: Analyzing trace with hash 673264860, now seen corresponding path program 20 times [2024-01-31 16:51:41,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:51:41,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150322887] [2024-01-31 16:51:41,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:51:41,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:51:41,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:42,561 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:42,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:51:42,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150322887] [2024-01-31 16:51:42,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150322887] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:51:42,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127689359] [2024-01-31 16:51:42,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:51:42,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:42,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:51:42,564 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 16:51:42,567 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 16:51:42,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:51:42,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:51:42,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 16:51:42,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:51:43,491 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:43,492 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 110 treesize of output 94 [2024-01-31 16:51:43,614 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:43,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:51:43,973 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-31 16:51:43,973 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 135 treesize of output 160 [2024-01-31 16:51:44,297 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:44,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127689359] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:51:44,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:51:44,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-01-31 16:51:44,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772793640] [2024-01-31 16:51:44,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:51:44,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 16:51:44,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:51:44,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 16:51:44,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-01-31 16:51:44,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:51:44,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 192 transitions, 3355 flow. Second operand has 19 states, 19 states have (on average 7.842105263157895) internal successors, (149), 19 states have internal predecessors, (149), 0 states have call successors, (0), 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 16:51:44,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:51:44,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:51:44,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:51:45,222 INFO L124 PetriNetUnfolderBase]: 1533/3048 cut-off events. [2024-01-31 16:51:45,222 INFO L125 PetriNetUnfolderBase]: For 39319/39319 co-relation queries the response was YES. [2024-01-31 16:51:45,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14841 conditions, 3048 events. 1533/3048 cut-off events. For 39319/39319 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21483 event pairs, 455 based on Foata normal form. 12/3058 useless extension candidates. Maximal degree in co-relation 14739. Up to 990 conditions per place. [2024-01-31 16:51:45,242 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 147 selfloop transitions, 68 changer transitions 22/240 dead transitions. [2024-01-31 16:51:45,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 240 transitions, 3944 flow [2024-01-31 16:51:45,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:51:45,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:51:45,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 153 transitions. [2024-01-31 16:51:45,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2024-01-31 16:51:45,257 INFO L175 Difference]: Start difference. First operand has 228 places, 192 transitions, 3355 flow. Second operand 12 states and 153 transitions. [2024-01-31 16:51:45,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 240 transitions, 3944 flow [2024-01-31 16:51:45,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 240 transitions, 3643 flow, removed 31 selfloop flow, removed 20 redundant places. [2024-01-31 16:51:45,353 INFO L231 Difference]: Finished difference. Result has 213 places, 185 transitions, 3058 flow [2024-01-31 16:51:45,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3005, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3058, PETRI_PLACES=213, PETRI_TRANSITIONS=185} [2024-01-31 16:51:45,358 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 182 predicate places. [2024-01-31 16:51:45,358 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 185 transitions, 3058 flow [2024-01-31 16:51:45,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.842105263157895) internal successors, (149), 19 states have internal predecessors, (149), 0 states have call successors, (0), 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 16:51:45,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:51:45,359 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:51:45,372 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 16:51:45,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-01-31 16:51:45,572 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 16:51:45,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:51:45,572 INFO L85 PathProgramCache]: Analyzing trace with hash 26813682, now seen corresponding path program 21 times [2024-01-31 16:51:45,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:51:45,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981724904] [2024-01-31 16:51:45,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:51:45,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:51:45,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:46,987 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:46,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:51:46,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981724904] [2024-01-31 16:51:46,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981724904] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:51:46,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34148952] [2024-01-31 16:51:46,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:51:46,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:46,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:51:46,989 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 16:51:46,990 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 16:51:47,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:51:47,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:51:47,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 36 conjunts are in the unsatisfiable core [2024-01-31 16:51:47,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:51:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:47,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:51:48,478 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:48,478 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 51 treesize of output 95 [2024-01-31 16:51:48,541 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:48,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34148952] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:51:48,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:51:48,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-01-31 16:51:48,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487777685] [2024-01-31 16:51:48,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:51:48,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:51:48,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:51:48,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:51:48,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:51:48,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:51:48,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 185 transitions, 3058 flow. Second operand has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 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 16:51:48,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:51:48,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:51:48,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:51:49,287 INFO L124 PetriNetUnfolderBase]: 1545/3062 cut-off events. [2024-01-31 16:51:49,287 INFO L125 PetriNetUnfolderBase]: For 33359/33359 co-relation queries the response was YES. [2024-01-31 16:51:49,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14472 conditions, 3062 events. 1545/3062 cut-off events. For 33359/33359 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21468 event pairs, 473 based on Foata normal form. 12/3070 useless extension candidates. Maximal degree in co-relation 14373. Up to 1086 conditions per place. [2024-01-31 16:51:49,305 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 147 selfloop transitions, 75 changer transitions 7/232 dead transitions. [2024-01-31 16:51:49,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 232 transitions, 3797 flow [2024-01-31 16:51:49,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:51:49,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:51:49,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-01-31 16:51:49,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35064935064935066 [2024-01-31 16:51:49,307 INFO L175 Difference]: Start difference. First operand has 213 places, 185 transitions, 3058 flow. Second operand 11 states and 135 transitions. [2024-01-31 16:51:49,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 232 transitions, 3797 flow [2024-01-31 16:51:49,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 232 transitions, 3584 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-01-31 16:51:49,364 INFO L231 Difference]: Finished difference. Result has 208 places, 190 transitions, 3103 flow [2024-01-31 16:51:49,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2869, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3103, PETRI_PLACES=208, PETRI_TRANSITIONS=190} [2024-01-31 16:51:49,365 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 177 predicate places. [2024-01-31 16:51:49,365 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 190 transitions, 3103 flow [2024-01-31 16:51:49,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 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 16:51:49,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:51:49,365 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:51:49,378 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 16:51:49,578 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,SelfDestructingSolverStorable28 [2024-01-31 16:51:49,578 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 16:51:49,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:51:49,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1375300438, now seen corresponding path program 22 times [2024-01-31 16:51:49,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:51:49,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648459607] [2024-01-31 16:51:49,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:51:49,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:51:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:50,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:51:50,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648459607] [2024-01-31 16:51:50,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648459607] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:51:50,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55070864] [2024-01-31 16:51:50,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:51:50,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:50,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:51:50,738 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 16:51:50,739 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 16:51:51,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:51:51,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:51:51,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-31 16:51:51,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:51:51,487 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:51,488 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 157 treesize of output 141 [2024-01-31 16:51:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:51,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:51:52,318 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:52,319 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 51 treesize of output 95 [2024-01-31 16:51:52,381 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:52,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55070864] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:51:52,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:51:52,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 21 [2024-01-31 16:51:52,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710933790] [2024-01-31 16:51:52,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:51:52,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:51:52,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:51:52,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:51:52,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:51:52,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:51:52,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 190 transitions, 3103 flow. Second operand has 21 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 21 states have internal predecessors, (167), 0 states have call successors, (0), 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 16:51:52,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:51:52,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:51:52,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:51:53,429 INFO L124 PetriNetUnfolderBase]: 1653/3292 cut-off events. [2024-01-31 16:51:53,430 INFO L125 PetriNetUnfolderBase]: For 32447/32447 co-relation queries the response was YES. [2024-01-31 16:51:53,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15260 conditions, 3292 events. 1653/3292 cut-off events. For 32447/32447 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 23559 event pairs, 445 based on Foata normal form. 8/3296 useless extension candidates. Maximal degree in co-relation 15161. Up to 1082 conditions per place. [2024-01-31 16:51:53,447 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 165 selfloop transitions, 86 changer transitions 8/262 dead transitions. [2024-01-31 16:51:53,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 262 transitions, 4000 flow [2024-01-31 16:51:53,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:51:53,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:51:53,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 177 transitions. [2024-01-31 16:51:53,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36122448979591837 [2024-01-31 16:51:53,452 INFO L175 Difference]: Start difference. First operand has 208 places, 190 transitions, 3103 flow. Second operand 14 states and 177 transitions. [2024-01-31 16:51:53,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 262 transitions, 4000 flow [2024-01-31 16:51:53,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 262 transitions, 3928 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-01-31 16:51:53,506 INFO L231 Difference]: Finished difference. Result has 218 places, 196 transitions, 3326 flow [2024-01-31 16:51:53,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3038, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3326, PETRI_PLACES=218, PETRI_TRANSITIONS=196} [2024-01-31 16:51:53,506 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 187 predicate places. [2024-01-31 16:51:53,507 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 196 transitions, 3326 flow [2024-01-31 16:51:53,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 21 states have internal predecessors, (167), 0 states have call successors, (0), 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 16:51:53,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:51:53,507 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:51:53,523 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 16:51:53,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:53,720 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 16:51:53,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:51:53,721 INFO L85 PathProgramCache]: Analyzing trace with hash -422099004, now seen corresponding path program 23 times [2024-01-31 16:51:53,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:51:53,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680901722] [2024-01-31 16:51:53,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:51:53,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:51:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:54,926 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:54,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:51:54,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680901722] [2024-01-31 16:51:54,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680901722] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:51:54,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574032787] [2024-01-31 16:51:54,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:51:54,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:54,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:51:54,928 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 16:51:54,928 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 16:51:55,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:51:55,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:51:55,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-31 16:51:55,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:51:55,780 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:55,780 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 157 treesize of output 141 [2024-01-31 16:51:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:56,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:51:56,579 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:56,579 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 51 treesize of output 95 [2024-01-31 16:51:56,643 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:56,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574032787] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:51:56,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:51:56,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-01-31 16:51:56,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759082988] [2024-01-31 16:51:56,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:51:56,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:51:56,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:51:56,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:51:56,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:51:56,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:51:56,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 196 transitions, 3326 flow. Second operand has 21 states, 21 states have (on average 8.142857142857142) internal successors, (171), 21 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 16:51:56,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:51:56,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:51:56,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:51:57,554 INFO L124 PetriNetUnfolderBase]: 1599/3172 cut-off events. [2024-01-31 16:51:57,554 INFO L125 PetriNetUnfolderBase]: For 34473/34473 co-relation queries the response was YES. [2024-01-31 16:51:57,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15195 conditions, 3172 events. 1599/3172 cut-off events. For 34473/34473 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22501 event pairs, 461 based on Foata normal form. 6/3174 useless extension candidates. Maximal degree in co-relation 15094. Up to 1082 conditions per place. [2024-01-31 16:51:57,575 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 150 selfloop transitions, 82 changer transitions 13/248 dead transitions. [2024-01-31 16:51:57,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 248 transitions, 4007 flow [2024-01-31 16:51:57,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 16:51:57,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 16:51:57,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 159 transitions. [2024-01-31 16:51:57,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34945054945054943 [2024-01-31 16:51:57,577 INFO L175 Difference]: Start difference. First operand has 218 places, 196 transitions, 3326 flow. Second operand 13 states and 159 transitions. [2024-01-31 16:51:57,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 248 transitions, 4007 flow [2024-01-31 16:51:57,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 248 transitions, 3910 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-01-31 16:51:57,635 INFO L231 Difference]: Finished difference. Result has 223 places, 194 transitions, 3348 flow [2024-01-31 16:51:57,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3210, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3348, PETRI_PLACES=223, PETRI_TRANSITIONS=194} [2024-01-31 16:51:57,635 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 192 predicate places. [2024-01-31 16:51:57,635 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 194 transitions, 3348 flow [2024-01-31 16:51:57,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.142857142857142) internal successors, (171), 21 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 16:51:57,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:51:57,637 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:51:57,650 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 16:51:57,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:57,850 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 16:51:57,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:51:57,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1157114849, now seen corresponding path program 24 times [2024-01-31 16:51:57,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:51:57,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8156316] [2024-01-31 16:51:57,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:51:57,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:51:57,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:59,075 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:59,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:51:59,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8156316] [2024-01-31 16:51:59,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8156316] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:51:59,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642891752] [2024-01-31 16:51:59,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:51:59,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:59,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:51:59,077 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 16:51:59,079 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 16:51:59,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 16:51:59,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:51:59,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-31 16:51:59,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:51:59,932 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:59,932 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 124 treesize of output 108 [2024-01-31 16:52:00,150 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:00,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:00,550 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:52:00,551 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 168 treesize of output 194 [2024-01-31 16:52:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:00,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642891752] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:52:00,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:52:00,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 22 [2024-01-31 16:52:00,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068189745] [2024-01-31 16:52:00,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:52:00,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 16:52:00,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:00,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 16:52:00,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2024-01-31 16:52:00,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:52:00,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 194 transitions, 3348 flow. Second operand has 22 states, 22 states have (on average 7.7727272727272725) internal successors, (171), 22 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 16:52:00,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:00,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:52:00,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:02,101 INFO L124 PetriNetUnfolderBase]: 1763/3539 cut-off events. [2024-01-31 16:52:02,101 INFO L125 PetriNetUnfolderBase]: For 42569/42569 co-relation queries the response was YES. [2024-01-31 16:52:02,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17197 conditions, 3539 events. 1763/3539 cut-off events. For 42569/42569 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 25832 event pairs, 323 based on Foata normal form. 20/3539 useless extension candidates. Maximal degree in co-relation 17096. Up to 1104 conditions per place. [2024-01-31 16:52:02,124 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 185 selfloop transitions, 117 changer transitions 13/318 dead transitions. [2024-01-31 16:52:02,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 318 transitions, 4752 flow [2024-01-31 16:52:02,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 16:52:02,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 16:52:02,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 279 transitions. [2024-01-31 16:52:02,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36233766233766235 [2024-01-31 16:52:02,126 INFO L175 Difference]: Start difference. First operand has 223 places, 194 transitions, 3348 flow. Second operand 22 states and 279 transitions. [2024-01-31 16:52:02,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 318 transitions, 4752 flow [2024-01-31 16:52:02,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 318 transitions, 4566 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-01-31 16:52:02,194 INFO L231 Difference]: Finished difference. Result has 235 places, 210 transitions, 3925 flow [2024-01-31 16:52:02,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3185, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3925, PETRI_PLACES=235, PETRI_TRANSITIONS=210} [2024-01-31 16:52:02,194 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 204 predicate places. [2024-01-31 16:52:02,194 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 210 transitions, 3925 flow [2024-01-31 16:52:02,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.7727272727272725) internal successors, (171), 22 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 16:52:02,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:02,195 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:02,210 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 16:52:02,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:02,408 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 16:52:02,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:02,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1178842955, now seen corresponding path program 25 times [2024-01-31 16:52:02,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:02,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416963906] [2024-01-31 16:52:02,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:02,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:02,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:03,751 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:03,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:03,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416963906] [2024-01-31 16:52:03,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416963906] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:03,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012336235] [2024-01-31 16:52:03,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:52:03,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:03,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:03,753 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 16:52:03,754 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 16:52:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:04,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-31 16:52:04,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:04,493 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:52:04,493 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 157 treesize of output 141 [2024-01-31 16:52:04,788 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:04,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:05,375 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:52:05,375 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 51 treesize of output 95 [2024-01-31 16:52:05,444 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:05,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012336235] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:52:05,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:52:05,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-01-31 16:52:05,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922627416] [2024-01-31 16:52:05,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:52:05,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:52:05,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:05,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:52:05,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:52:05,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:52:05,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 210 transitions, 3925 flow. Second operand has 20 states, 20 states have (on average 8.05) internal successors, (161), 20 states have internal predecessors, (161), 0 states have call successors, (0), 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 16:52:05,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:05,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:52:05,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:06,686 INFO L124 PetriNetUnfolderBase]: 1899/3808 cut-off events. [2024-01-31 16:52:06,686 INFO L125 PetriNetUnfolderBase]: For 51028/51028 co-relation queries the response was YES. [2024-01-31 16:52:06,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19486 conditions, 3808 events. 1899/3808 cut-off events. For 51028/51028 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 28147 event pairs, 609 based on Foata normal form. 10/3812 useless extension candidates. Maximal degree in co-relation 19380. Up to 1622 conditions per place. [2024-01-31 16:52:06,709 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 202 selfloop transitions, 80 changer transitions 8/293 dead transitions. [2024-01-31 16:52:06,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 293 transitions, 5146 flow [2024-01-31 16:52:06,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:52:06,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:52:06,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 185 transitions. [2024-01-31 16:52:06,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-01-31 16:52:06,710 INFO L175 Difference]: Start difference. First operand has 235 places, 210 transitions, 3925 flow. Second operand 14 states and 185 transitions. [2024-01-31 16:52:06,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 293 transitions, 5146 flow [2024-01-31 16:52:06,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 293 transitions, 4957 flow, removed 60 selfloop flow, removed 12 redundant places. [2024-01-31 16:52:06,798 INFO L231 Difference]: Finished difference. Result has 237 places, 220 transitions, 4182 flow [2024-01-31 16:52:06,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3761, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4182, PETRI_PLACES=237, PETRI_TRANSITIONS=220} [2024-01-31 16:52:06,799 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 206 predicate places. [2024-01-31 16:52:06,799 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 220 transitions, 4182 flow [2024-01-31 16:52:06,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.05) internal successors, (161), 20 states have internal predecessors, (161), 0 states have call successors, (0), 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 16:52:06,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:06,800 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:06,814 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 16:52:07,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:07,013 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 16:52:07,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:07,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1519426507, now seen corresponding path program 26 times [2024-01-31 16:52:07,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:07,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394733540] [2024-01-31 16:52:07,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:07,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:08,258 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:08,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:08,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394733540] [2024-01-31 16:52:08,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394733540] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:08,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519084745] [2024-01-31 16:52:08,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:52:08,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:08,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:08,261 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 16:52:08,262 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 16:52:08,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:52:08,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:08,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-31 16:52:08,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:09,227 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:52:09,228 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 124 treesize of output 108 [2024-01-31 16:52:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:09,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:09,898 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-31 16:52:09,898 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 164 treesize of output 177 [2024-01-31 16:52:10,224 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:10,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519084745] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:52:10,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:52:10,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 22 [2024-01-31 16:52:10,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544435597] [2024-01-31 16:52:10,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:52:10,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 16:52:10,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:10,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 16:52:10,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2024-01-31 16:52:10,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:52:10,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 220 transitions, 4182 flow. Second operand has 22 states, 22 states have (on average 7.7727272727272725) internal successors, (171), 22 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 16:52:10,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:10,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:52:10,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:12,565 INFO L124 PetriNetUnfolderBase]: 1917/3877 cut-off events. [2024-01-31 16:52:12,565 INFO L125 PetriNetUnfolderBase]: For 52818/52818 co-relation queries the response was YES. [2024-01-31 16:52:12,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19774 conditions, 3877 events. 1917/3877 cut-off events. For 52818/52818 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 28747 event pairs, 233 based on Foata normal form. 20/3887 useless extension candidates. Maximal degree in co-relation 19668. Up to 630 conditions per place. [2024-01-31 16:52:12,588 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 206 selfloop transitions, 150 changer transitions 15/374 dead transitions. [2024-01-31 16:52:12,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 374 transitions, 5801 flow [2024-01-31 16:52:12,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 16:52:12,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 16:52:12,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 347 transitions. [2024-01-31 16:52:12,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3671957671957672 [2024-01-31 16:52:12,589 INFO L175 Difference]: Start difference. First operand has 237 places, 220 transitions, 4182 flow. Second operand 27 states and 347 transitions. [2024-01-31 16:52:12,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 374 transitions, 5801 flow [2024-01-31 16:52:12,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 374 transitions, 5615 flow, removed 53 selfloop flow, removed 10 redundant places. [2024-01-31 16:52:12,678 INFO L231 Difference]: Finished difference. Result has 259 places, 232 transitions, 4752 flow [2024-01-31 16:52:12,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3973, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4752, PETRI_PLACES=259, PETRI_TRANSITIONS=232} [2024-01-31 16:52:12,679 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 228 predicate places. [2024-01-31 16:52:12,679 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 232 transitions, 4752 flow [2024-01-31 16:52:12,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.7727272727272725) internal successors, (171), 22 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 16:52:12,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:12,679 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:12,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:12,892 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,SelfDestructingSolverStorable33 [2024-01-31 16:52:12,892 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 16:52:12,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:12,893 INFO L85 PathProgramCache]: Analyzing trace with hash 525609915, now seen corresponding path program 27 times [2024-01-31 16:52:12,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:12,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924926067] [2024-01-31 16:52:12,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:12,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:12,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:14,158 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:14,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:14,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924926067] [2024-01-31 16:52:14,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924926067] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:14,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129583293] [2024-01-31 16:52:14,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:52:14,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:14,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:14,160 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 16:52:14,161 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 16:52:14,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:52:14,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:14,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-31 16:52:14,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:15,114 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:52:15,114 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 122 treesize of output 106 [2024-01-31 16:52:15,287 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:15,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:15,681 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:52:15,682 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 168 treesize of output 194 [2024-01-31 16:52:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:16,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129583293] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:52:16,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:52:16,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2024-01-31 16:52:16,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383068933] [2024-01-31 16:52:16,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:52:16,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:52:16,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:16,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:52:16,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:52:16,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:52:16,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 232 transitions, 4752 flow. Second operand has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 states have internal predecessors, (160), 0 states have call successors, (0), 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 16:52:16,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:16,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:52:16,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:17,592 INFO L124 PetriNetUnfolderBase]: 1897/3793 cut-off events. [2024-01-31 16:52:17,593 INFO L125 PetriNetUnfolderBase]: For 59160/59160 co-relation queries the response was YES. [2024-01-31 16:52:17,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20392 conditions, 3793 events. 1897/3793 cut-off events. For 59160/59160 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 27889 event pairs, 327 based on Foata normal form. 4/3789 useless extension candidates. Maximal degree in co-relation 20285. Up to 862 conditions per place. [2024-01-31 16:52:17,621 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 191 selfloop transitions, 119 changer transitions 21/334 dead transitions. [2024-01-31 16:52:17,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 334 transitions, 5703 flow [2024-01-31 16:52:17,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 16:52:17,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 16:52:17,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 302 transitions. [2024-01-31 16:52:17,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31957671957671957 [2024-01-31 16:52:17,623 INFO L175 Difference]: Start difference. First operand has 259 places, 232 transitions, 4752 flow. Second operand 27 states and 302 transitions. [2024-01-31 16:52:17,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 334 transitions, 5703 flow [2024-01-31 16:52:17,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 334 transitions, 5466 flow, removed 48 selfloop flow, removed 19 redundant places. [2024-01-31 16:52:17,732 INFO L231 Difference]: Finished difference. Result has 266 places, 229 transitions, 4725 flow [2024-01-31 16:52:17,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4479, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4725, PETRI_PLACES=266, PETRI_TRANSITIONS=229} [2024-01-31 16:52:17,732 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 235 predicate places. [2024-01-31 16:52:17,732 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 229 transitions, 4725 flow [2024-01-31 16:52:17,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 states have internal predecessors, (160), 0 states have call successors, (0), 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 16:52:17,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:17,733 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:17,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:17,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:17,946 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 16:52:17,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:17,947 INFO L85 PathProgramCache]: Analyzing trace with hash 349457517, now seen corresponding path program 28 times [2024-01-31 16:52:17,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:17,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010077481] [2024-01-31 16:52:17,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:17,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:18,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:18,984 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:18,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:18,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010077481] [2024-01-31 16:52:18,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010077481] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:18,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998005829] [2024-01-31 16:52:18,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:52:18,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:18,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:19,006 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 16:52:19,006 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 16:52:19,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:52:19,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:19,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-31 16:52:19,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:19,917 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:20,632 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:52:20,633 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 51 treesize of output 95 [2024-01-31 16:52:20,695 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:20,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998005829] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:52:20,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:52:20,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 23 [2024-01-31 16:52:20,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037453479] [2024-01-31 16:52:20,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:52:20,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:52:20,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:20,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:52:20,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:52:20,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:52:20,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 229 transitions, 4725 flow. Second operand has 23 states, 23 states have (on average 8.043478260869565) internal successors, (185), 23 states have internal predecessors, (185), 0 states have call successors, (0), 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 16:52:20,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:20,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:52:20,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:22,249 INFO L124 PetriNetUnfolderBase]: 1905/3808 cut-off events. [2024-01-31 16:52:22,249 INFO L125 PetriNetUnfolderBase]: For 62640/62640 co-relation queries the response was YES. [2024-01-31 16:52:22,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20500 conditions, 3808 events. 1905/3808 cut-off events. For 62640/62640 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 28227 event pairs, 333 based on Foata normal form. 32/3820 useless extension candidates. Maximal degree in co-relation 20395. Up to 1254 conditions per place. [2024-01-31 16:52:22,274 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 183 selfloop transitions, 130 changer transitions 14/330 dead transitions. [2024-01-31 16:52:22,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 330 transitions, 5857 flow [2024-01-31 16:52:22,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-31 16:52:22,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-31 16:52:22,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 258 transitions. [2024-01-31 16:52:22,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36857142857142855 [2024-01-31 16:52:22,276 INFO L175 Difference]: Start difference. First operand has 266 places, 229 transitions, 4725 flow. Second operand 20 states and 258 transitions. [2024-01-31 16:52:22,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 330 transitions, 5857 flow [2024-01-31 16:52:22,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 330 transitions, 5623 flow, removed 12 selfloop flow, removed 17 redundant places. [2024-01-31 16:52:22,377 INFO L231 Difference]: Finished difference. Result has 269 places, 236 transitions, 4941 flow [2024-01-31 16:52:22,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4402, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4941, PETRI_PLACES=269, PETRI_TRANSITIONS=236} [2024-01-31 16:52:22,377 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 238 predicate places. [2024-01-31 16:52:22,378 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 236 transitions, 4941 flow [2024-01-31 16:52:22,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 8.043478260869565) internal successors, (185), 23 states have internal predecessors, (185), 0 states have call successors, (0), 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 16:52:22,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:22,378 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:22,391 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 16:52:22,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:22,592 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 16:52:22,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:22,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1245371657, now seen corresponding path program 29 times [2024-01-31 16:52:22,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:22,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620950082] [2024-01-31 16:52:22,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:22,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:23,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:23,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620950082] [2024-01-31 16:52:23,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620950082] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:23,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426030514] [2024-01-31 16:52:23,810 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:52:23,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:23,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:23,811 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 16:52:23,812 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 16:52:24,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:52:24,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:24,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-31 16:52:24,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:24,798 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:52:24,799 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 127 treesize of output 119 [2024-01-31 16:52:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:24,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:25,290 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:52:25,291 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 168 treesize of output 194 [2024-01-31 16:52:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:25,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426030514] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:52:25,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:52:25,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-01-31 16:52:25,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607919062] [2024-01-31 16:52:25,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:52:25,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:52:25,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:25,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:52:25,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:52:25,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:52:25,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 236 transitions, 4941 flow. Second operand has 21 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 21 states have internal predecessors, (167), 0 states have call successors, (0), 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 16:52:25,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:25,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:52:25,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:26,954 INFO L124 PetriNetUnfolderBase]: 1865/3720 cut-off events. [2024-01-31 16:52:26,954 INFO L125 PetriNetUnfolderBase]: For 60855/60855 co-relation queries the response was YES. [2024-01-31 16:52:26,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20305 conditions, 3720 events. 1865/3720 cut-off events. For 60855/60855 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 27465 event pairs, 563 based on Foata normal form. 4/3718 useless extension candidates. Maximal degree in co-relation 20200. Up to 1370 conditions per place. [2024-01-31 16:52:26,978 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 172 selfloop transitions, 90 changer transitions 17/282 dead transitions. [2024-01-31 16:52:26,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 282 transitions, 5609 flow [2024-01-31 16:52:26,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 16:52:26,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 16:52:26,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 170 transitions. [2024-01-31 16:52:26,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3238095238095238 [2024-01-31 16:52:26,980 INFO L175 Difference]: Start difference. First operand has 269 places, 236 transitions, 4941 flow. Second operand 15 states and 170 transitions. [2024-01-31 16:52:26,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 282 transitions, 5609 flow [2024-01-31 16:52:27,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 282 transitions, 5426 flow, removed 10 selfloop flow, removed 13 redundant places. [2024-01-31 16:52:27,072 INFO L231 Difference]: Finished difference. Result has 270 places, 231 transitions, 4849 flow [2024-01-31 16:52:27,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4705, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4849, PETRI_PLACES=270, PETRI_TRANSITIONS=231} [2024-01-31 16:52:27,072 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 239 predicate places. [2024-01-31 16:52:27,072 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 231 transitions, 4849 flow [2024-01-31 16:52:27,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 21 states have internal predecessors, (167), 0 states have call successors, (0), 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 16:52:27,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:27,073 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:27,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:27,286 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,SelfDestructingSolverStorable36 [2024-01-31 16:52:27,287 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 16:52:27,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:27,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1916324001, now seen corresponding path program 30 times [2024-01-31 16:52:27,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:27,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745077354] [2024-01-31 16:52:27,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:27,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:28,466 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:28,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:28,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745077354] [2024-01-31 16:52:28,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745077354] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:28,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793305299] [2024-01-31 16:52:28,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:52:28,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:28,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:28,467 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 16:52:28,471 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 16:52:28,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 16:52:28,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:28,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-31 16:52:28,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:29,399 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:52:29,399 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 157 treesize of output 137 [2024-01-31 16:52:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:29,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:30,144 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:52:30,144 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 51 treesize of output 95 [2024-01-31 16:52:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:30,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793305299] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:52:30,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:52:30,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-01-31 16:52:30,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199021193] [2024-01-31 16:52:30,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:52:30,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:52:30,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:30,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:52:30,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:52:30,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:52:30,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 231 transitions, 4849 flow. Second operand has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 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 16:52:30,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:30,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:52:30,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:31,189 INFO L124 PetriNetUnfolderBase]: 1809/3576 cut-off events. [2024-01-31 16:52:31,189 INFO L125 PetriNetUnfolderBase]: For 59367/59367 co-relation queries the response was YES. [2024-01-31 16:52:31,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19899 conditions, 3576 events. 1809/3576 cut-off events. For 59367/59367 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 26176 event pairs, 679 based on Foata normal form. 4/3574 useless extension candidates. Maximal degree in co-relation 19795. Up to 1764 conditions per place. [2024-01-31 16:52:31,215 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 191 selfloop transitions, 75 changer transitions 11/280 dead transitions. [2024-01-31 16:52:31,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 280 transitions, 5539 flow [2024-01-31 16:52:31,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 16:52:31,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 16:52:31,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 161 transitions. [2024-01-31 16:52:31,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35384615384615387 [2024-01-31 16:52:31,291 INFO L175 Difference]: Start difference. First operand has 270 places, 231 transitions, 4849 flow. Second operand 13 states and 161 transitions. [2024-01-31 16:52:31,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 280 transitions, 5539 flow [2024-01-31 16:52:31,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 280 transitions, 5203 flow, removed 6 selfloop flow, removed 15 redundant places. [2024-01-31 16:52:31,383 INFO L231 Difference]: Finished difference. Result has 260 places, 227 transitions, 4595 flow [2024-01-31 16:52:31,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4466, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4595, PETRI_PLACES=260, PETRI_TRANSITIONS=227} [2024-01-31 16:52:31,384 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 229 predicate places. [2024-01-31 16:52:31,384 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 227 transitions, 4595 flow [2024-01-31 16:52:31,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 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 16:52:31,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:31,384 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:31,398 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 16:52:31,591 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,SelfDestructingSolverStorable37 [2024-01-31 16:52:31,591 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 16:52:31,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:31,593 INFO L85 PathProgramCache]: Analyzing trace with hash 858284299, now seen corresponding path program 31 times [2024-01-31 16:52:31,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:31,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001496628] [2024-01-31 16:52:31,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:31,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:31,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:32,860 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:32,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:32,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001496628] [2024-01-31 16:52:32,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001496628] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:32,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947141394] [2024-01-31 16:52:32,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:52:32,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:32,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:32,862 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 16:52:32,864 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 16:52:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:33,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 16:52:33,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:33,770 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:52:33,771 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 124 treesize of output 112 [2024-01-31 16:52:33,972 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:33,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:34,445 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-31 16:52:34,445 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 164 treesize of output 177 [2024-01-31 16:52:34,801 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:34,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947141394] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:52:34,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:52:34,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 21 [2024-01-31 16:52:34,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524087918] [2024-01-31 16:52:34,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:52:34,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:52:34,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:34,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:52:34,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:52:34,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:52:34,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 227 transitions, 4595 flow. Second operand has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 states have internal predecessors, (160), 0 states have call successors, (0), 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 16:52:34,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:34,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:52:34,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:37,712 INFO L124 PetriNetUnfolderBase]: 1827/3614 cut-off events. [2024-01-31 16:52:37,712 INFO L125 PetriNetUnfolderBase]: For 50263/50263 co-relation queries the response was YES. [2024-01-31 16:52:37,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19631 conditions, 3614 events. 1827/3614 cut-off events. For 50263/50263 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 26339 event pairs, 199 based on Foata normal form. 4/3612 useless extension candidates. Maximal degree in co-relation 19529. Up to 572 conditions per place. [2024-01-31 16:52:37,737 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 161 selfloop transitions, 156 changer transitions 26/346 dead transitions. [2024-01-31 16:52:37,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 346 transitions, 5633 flow [2024-01-31 16:52:37,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-01-31 16:52:37,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-01-31 16:52:37,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 352 transitions. [2024-01-31 16:52:37,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3142857142857143 [2024-01-31 16:52:37,739 INFO L175 Difference]: Start difference. First operand has 260 places, 227 transitions, 4595 flow. Second operand 32 states and 352 transitions. [2024-01-31 16:52:37,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 346 transitions, 5633 flow [2024-01-31 16:52:37,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 346 transitions, 5492 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-01-31 16:52:37,824 INFO L231 Difference]: Finished difference. Result has 279 places, 225 transitions, 4741 flow [2024-01-31 16:52:37,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4424, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=4741, PETRI_PLACES=279, PETRI_TRANSITIONS=225} [2024-01-31 16:52:37,825 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 248 predicate places. [2024-01-31 16:52:37,825 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 225 transitions, 4741 flow [2024-01-31 16:52:37,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 states have internal predecessors, (160), 0 states have call successors, (0), 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 16:52:37,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:37,826 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:37,838 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 16:52:38,038 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,SelfDestructingSolverStorable38 [2024-01-31 16:52:38,039 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 16:52:38,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:38,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1423608523, now seen corresponding path program 32 times [2024-01-31 16:52:38,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:38,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702917387] [2024-01-31 16:52:38,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:38,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:39,276 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:39,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:39,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702917387] [2024-01-31 16:52:39,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702917387] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:39,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877234556] [2024-01-31 16:52:39,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:52:39,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:39,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:39,278 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 16:52:39,279 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 16:52:39,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:52:39,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:39,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-31 16:52:39,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:40,262 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:52:40,263 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 107 treesize of output 91 [2024-01-31 16:52:40,379 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:40,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:40,735 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-31 16:52:40,735 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 164 treesize of output 177 [2024-01-31 16:52:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:41,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877234556] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:52:41,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:52:41,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-01-31 16:52:41,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326119998] [2024-01-31 16:52:41,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:52:41,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 16:52:41,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:41,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 16:52:41,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2024-01-31 16:52:41,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:52:41,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 225 transitions, 4741 flow. Second operand has 19 states, 19 states have (on average 7.7368421052631575) internal successors, (147), 19 states have internal predecessors, (147), 0 states have call successors, (0), 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 16:52:41,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:41,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:52:41,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:42,204 INFO L124 PetriNetUnfolderBase]: 1823/3614 cut-off events. [2024-01-31 16:52:42,204 INFO L125 PetriNetUnfolderBase]: For 53891/53891 co-relation queries the response was YES. [2024-01-31 16:52:42,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20053 conditions, 3614 events. 1823/3614 cut-off events. For 53891/53891 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 26526 event pairs, 575 based on Foata normal form. 4/3612 useless extension candidates. Maximal degree in co-relation 19951. Up to 1138 conditions per place. [2024-01-31 16:52:42,230 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 151 selfloop transitions, 105 changer transitions 14/273 dead transitions. [2024-01-31 16:52:42,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 273 transitions, 5454 flow [2024-01-31 16:52:42,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 16:52:42,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 16:52:42,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 157 transitions. [2024-01-31 16:52:42,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34505494505494505 [2024-01-31 16:52:42,231 INFO L175 Difference]: Start difference. First operand has 279 places, 225 transitions, 4741 flow. Second operand 13 states and 157 transitions. [2024-01-31 16:52:42,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 273 transitions, 5454 flow [2024-01-31 16:52:42,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 273 transitions, 5059 flow, removed 12 selfloop flow, removed 24 redundant places. [2024-01-31 16:52:42,313 INFO L231 Difference]: Finished difference. Result has 266 places, 223 transitions, 4529 flow [2024-01-31 16:52:42,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4346, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4529, PETRI_PLACES=266, PETRI_TRANSITIONS=223} [2024-01-31 16:52:42,314 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 235 predicate places. [2024-01-31 16:52:42,314 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 223 transitions, 4529 flow [2024-01-31 16:52:42,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.7368421052631575) internal successors, (147), 19 states have internal predecessors, (147), 0 states have call successors, (0), 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 16:52:42,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:42,315 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:42,332 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 16:52:42,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-01-31 16:52:42,525 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 16:52:42,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:42,525 INFO L85 PathProgramCache]: Analyzing trace with hash -131617887, now seen corresponding path program 33 times [2024-01-31 16:52:42,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:42,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281865579] [2024-01-31 16:52:42,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:42,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:42,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:43,749 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:43,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:43,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281865579] [2024-01-31 16:52:43,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281865579] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:43,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863072558] [2024-01-31 16:52:43,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:52:43,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:43,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:43,751 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 16:52:43,752 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 16:52:44,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:52:44,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:44,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-31 16:52:44,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:44,684 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:52:44,684 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 92 treesize of output 84 [2024-01-31 16:52:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:44,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:45,149 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-31 16:52:45,149 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 164 treesize of output 177 [2024-01-31 16:52:45,507 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:45,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863072558] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:52:45,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:52:45,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-01-31 16:52:45,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38007753] [2024-01-31 16:52:45,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:52:45,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:52:45,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:45,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:52:45,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:52:45,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:52:45,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 223 transitions, 4529 flow. Second operand has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 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 16:52:45,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:45,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:52:45,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:46,526 INFO L124 PetriNetUnfolderBase]: 1767/3490 cut-off events. [2024-01-31 16:52:46,526 INFO L125 PetriNetUnfolderBase]: For 48123/48123 co-relation queries the response was YES. [2024-01-31 16:52:46,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19315 conditions, 3490 events. 1767/3490 cut-off events. For 48123/48123 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 25441 event pairs, 561 based on Foata normal form. 4/3488 useless extension candidates. Maximal degree in co-relation 19272. Up to 1170 conditions per place. [2024-01-31 16:52:46,548 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 138 selfloop transitions, 97 changer transitions 14/252 dead transitions. [2024-01-31 16:52:46,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 252 transitions, 5098 flow [2024-01-31 16:52:46,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:52:46,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:52:46,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-01-31 16:52:46,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34 [2024-01-31 16:52:46,550 INFO L175 Difference]: Start difference. First operand has 266 places, 223 transitions, 4529 flow. Second operand 10 states and 119 transitions. [2024-01-31 16:52:46,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 252 transitions, 5098 flow [2024-01-31 16:52:46,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 252 transitions, 4892 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-01-31 16:52:46,614 INFO L231 Difference]: Finished difference. Result has 259 places, 217 transitions, 4398 flow [2024-01-31 16:52:46,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4279, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4398, PETRI_PLACES=259, PETRI_TRANSITIONS=217} [2024-01-31 16:52:46,614 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 228 predicate places. [2024-01-31 16:52:46,614 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 217 transitions, 4398 flow [2024-01-31 16:52:46,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 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 16:52:46,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:46,615 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:46,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-01-31 16:52:46,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:46,828 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 16:52:46,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:46,828 INFO L85 PathProgramCache]: Analyzing trace with hash 690430354, now seen corresponding path program 34 times [2024-01-31 16:52:46,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:46,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172071920] [2024-01-31 16:52:46,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:46,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:46,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:48,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:48,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172071920] [2024-01-31 16:52:48,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172071920] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:48,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950596765] [2024-01-31 16:52:48,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:52:48,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:48,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:48,075 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 16:52:48,092 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 16:52:48,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:52:48,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:48,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 36 conjunts are in the unsatisfiable core [2024-01-31 16:52:48,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:48,958 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:48,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:49,554 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-31 16:52:49,554 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 44 treesize of output 75 [2024-01-31 16:52:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:49,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950596765] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:52:49,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:52:49,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2024-01-31 16:52:49,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273288632] [2024-01-31 16:52:49,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:52:49,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 16:52:49,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:49,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 16:52:49,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2024-01-31 16:52:49,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:52:49,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 217 transitions, 4398 flow. Second operand has 22 states, 22 states have (on average 8.0) internal successors, (176), 22 states have internal predecessors, (176), 0 states have call successors, (0), 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 16:52:49,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:49,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:52:49,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:51,227 INFO L124 PetriNetUnfolderBase]: 2301/4574 cut-off events. [2024-01-31 16:52:51,227 INFO L125 PetriNetUnfolderBase]: For 59794/59794 co-relation queries the response was YES. [2024-01-31 16:52:51,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24344 conditions, 4574 events. 2301/4574 cut-off events. For 59794/59794 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 34914 event pairs, 435 based on Foata normal form. 24/4594 useless extension candidates. Maximal degree in co-relation 24302. Up to 1122 conditions per place. [2024-01-31 16:52:51,259 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 194 selfloop transitions, 162 changer transitions 22/381 dead transitions. [2024-01-31 16:52:51,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 381 transitions, 6823 flow [2024-01-31 16:52:51,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-31 16:52:51,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-31 16:52:51,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 295 transitions. [2024-01-31 16:52:51,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33714285714285713 [2024-01-31 16:52:51,261 INFO L175 Difference]: Start difference. First operand has 259 places, 217 transitions, 4398 flow. Second operand 25 states and 295 transitions. [2024-01-31 16:52:51,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 381 transitions, 6823 flow [2024-01-31 16:52:51,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 381 transitions, 6561 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-01-31 16:52:51,363 INFO L231 Difference]: Finished difference. Result has 275 places, 263 transitions, 5533 flow [2024-01-31 16:52:51,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4176, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5533, PETRI_PLACES=275, PETRI_TRANSITIONS=263} [2024-01-31 16:52:51,364 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 244 predicate places. [2024-01-31 16:52:51,364 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 263 transitions, 5533 flow [2024-01-31 16:52:51,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.0) internal successors, (176), 22 states have internal predecessors, (176), 0 states have call successors, (0), 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 16:52:51,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:51,366 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:51,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:51,578 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,SelfDestructingSolverStorable41 [2024-01-31 16:52:51,579 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 16:52:51,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:51,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1987276266, now seen corresponding path program 35 times [2024-01-31 16:52:51,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:51,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837400494] [2024-01-31 16:52:51,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:51,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:52,777 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:52,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:52,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837400494] [2024-01-31 16:52:52,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837400494] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:52,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252299559] [2024-01-31 16:52:52,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:52:52,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:52,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:52,779 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 16:52:52,781 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 16:52:53,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:52:53,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:53,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-31 16:52:53,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:53,622 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:52:53,623 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 157 treesize of output 141 [2024-01-31 16:52:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:53,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:54,383 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:52:54,384 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 51 treesize of output 95 [2024-01-31 16:52:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:54,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252299559] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:52:54,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:52:54,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-01-31 16:52:54,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053595959] [2024-01-31 16:52:54,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:52:54,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:52:54,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:54,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:52:54,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:52:54,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:52:54,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 263 transitions, 5533 flow. Second operand has 21 states, 21 states have (on average 8.142857142857142) internal successors, (171), 21 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 16:52:54,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:54,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:52:54,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:55,874 INFO L124 PetriNetUnfolderBase]: 2653/5283 cut-off events. [2024-01-31 16:52:55,874 INFO L125 PetriNetUnfolderBase]: For 76503/76503 co-relation queries the response was YES. [2024-01-31 16:52:55,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28687 conditions, 5283 events. 2653/5283 cut-off events. For 76503/76503 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 41316 event pairs, 639 based on Foata normal form. 16/5291 useless extension candidates. Maximal degree in co-relation 28641. Up to 1608 conditions per place. [2024-01-31 16:52:55,912 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 222 selfloop transitions, 134 changer transitions 9/368 dead transitions. [2024-01-31 16:52:55,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 368 transitions, 7210 flow [2024-01-31 16:52:55,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 16:52:55,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 16:52:55,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 200 transitions. [2024-01-31 16:52:55,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-01-31 16:52:55,913 INFO L175 Difference]: Start difference. First operand has 275 places, 263 transitions, 5533 flow. Second operand 15 states and 200 transitions. [2024-01-31 16:52:55,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 368 transitions, 7210 flow [2024-01-31 16:52:56,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 368 transitions, 6919 flow, removed 84 selfloop flow, removed 9 redundant places. [2024-01-31 16:52:56,077 INFO L231 Difference]: Finished difference. Result has 281 places, 277 transitions, 5911 flow [2024-01-31 16:52:56,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5281, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5911, PETRI_PLACES=281, PETRI_TRANSITIONS=277} [2024-01-31 16:52:56,078 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 250 predicate places. [2024-01-31 16:52:56,078 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 277 transitions, 5911 flow [2024-01-31 16:52:56,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.142857142857142) internal successors, (171), 21 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 16:52:56,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:56,078 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:56,094 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 16:52:56,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-01-31 16:52:56,281 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 16:52:56,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:56,281 INFO L85 PathProgramCache]: Analyzing trace with hash 170539266, now seen corresponding path program 36 times [2024-01-31 16:52:56,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:56,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789534184] [2024-01-31 16:52:56,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:56,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:57,395 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:57,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:57,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789534184] [2024-01-31 16:52:57,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789534184] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:57,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957882280] [2024-01-31 16:52:57,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:52:57,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:57,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:57,397 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 16:52:57,398 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 16:52:57,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 16:52:57,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:57,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-31 16:52:57,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:58,369 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:52:58,369 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 124 treesize of output 108 [2024-01-31 16:52:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:58,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:58,944 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:52:58,945 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 168 treesize of output 194 [2024-01-31 16:52:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:59,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957882280] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:52:59,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:52:59,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2024-01-31 16:52:59,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125606560] [2024-01-31 16:52:59,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:52:59,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:52:59,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:59,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:52:59,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:52:59,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:52:59,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 277 transitions, 5911 flow. Second operand has 21 states, 21 states have (on average 7.714285714285714) internal successors, (162), 21 states have internal predecessors, (162), 0 states have call successors, (0), 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 16:52:59,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:59,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:52:59,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:00,953 INFO L124 PetriNetUnfolderBase]: 2749/5469 cut-off events. [2024-01-31 16:53:00,953 INFO L125 PetriNetUnfolderBase]: For 79933/79933 co-relation queries the response was YES. [2024-01-31 16:53:00,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29771 conditions, 5469 events. 2749/5469 cut-off events. For 79933/79933 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 42952 event pairs, 971 based on Foata normal form. 16/5475 useless extension candidates. Maximal degree in co-relation 29724. Up to 2404 conditions per place. [2024-01-31 16:53:00,991 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 248 selfloop transitions, 128 changer transitions 13/392 dead transitions. [2024-01-31 16:53:00,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 392 transitions, 7284 flow [2024-01-31 16:53:00,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 16:53:00,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 16:53:00,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 254 transitions. [2024-01-31 16:53:00,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3819548872180451 [2024-01-31 16:53:00,992 INFO L175 Difference]: Start difference. First operand has 281 places, 277 transitions, 5911 flow. Second operand 19 states and 254 transitions. [2024-01-31 16:53:00,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 392 transitions, 7284 flow [2024-01-31 16:53:01,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 392 transitions, 7158 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-01-31 16:53:01,147 INFO L231 Difference]: Finished difference. Result has 297 places, 291 transitions, 6431 flow [2024-01-31 16:53:01,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5785, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6431, PETRI_PLACES=297, PETRI_TRANSITIONS=291} [2024-01-31 16:53:01,148 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 266 predicate places. [2024-01-31 16:53:01,148 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 291 transitions, 6431 flow [2024-01-31 16:53:01,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.714285714285714) internal successors, (162), 21 states have internal predecessors, (162), 0 states have call successors, (0), 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 16:53:01,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:01,148 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:01,161 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 16:53:01,361 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,SelfDestructingSolverStorable43 [2024-01-31 16:53:01,361 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 16:53:01,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:01,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1452614488, now seen corresponding path program 37 times [2024-01-31 16:53:01,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:01,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057183838] [2024-01-31 16:53:01,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:01,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:02,479 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:02,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:02,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057183838] [2024-01-31 16:53:02,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057183838] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:02,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607738535] [2024-01-31 16:53:02,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:53:02,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:02,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:02,481 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 16:53:02,483 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 16:53:02,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:02,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:53:02,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:03,220 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:53:03,221 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 157 treesize of output 141 [2024-01-31 16:53:03,433 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:03,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:03,893 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:53:03,894 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 51 treesize of output 95 [2024-01-31 16:53:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:03,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607738535] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:03,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:03,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-01-31 16:53:03,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942687244] [2024-01-31 16:53:03,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:03,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:53:03,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:03,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:53:03,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:53:03,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:53:03,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 291 transitions, 6431 flow. Second operand has 20 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 0 states have call successors, (0), 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 16:53:03,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:03,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:53:03,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:05,539 INFO L124 PetriNetUnfolderBase]: 2635/5227 cut-off events. [2024-01-31 16:53:05,540 INFO L125 PetriNetUnfolderBase]: For 81353/81353 co-relation queries the response was YES. [2024-01-31 16:53:05,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29393 conditions, 5227 events. 2635/5227 cut-off events. For 81353/81353 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 40877 event pairs, 995 based on Foata normal form. 18/5223 useless extension candidates. Maximal degree in co-relation 29341. Up to 2414 conditions per place. [2024-01-31 16:53:05,579 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 230 selfloop transitions, 113 changer transitions 8/354 dead transitions. [2024-01-31 16:53:05,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 354 transitions, 7374 flow [2024-01-31 16:53:05,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 16:53:05,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 16:53:05,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 191 transitions. [2024-01-31 16:53:05,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3410714285714286 [2024-01-31 16:53:05,580 INFO L175 Difference]: Start difference. First operand has 297 places, 291 transitions, 6431 flow. Second operand 16 states and 191 transitions. [2024-01-31 16:53:05,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 354 transitions, 7374 flow [2024-01-31 16:53:05,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 354 transitions, 7252 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-01-31 16:53:05,744 INFO L231 Difference]: Finished difference. Result has 304 places, 291 transitions, 6592 flow [2024-01-31 16:53:05,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6170, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6592, PETRI_PLACES=304, PETRI_TRANSITIONS=291} [2024-01-31 16:53:05,745 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 273 predicate places. [2024-01-31 16:53:05,745 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 291 transitions, 6592 flow [2024-01-31 16:53:05,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 0 states have call successors, (0), 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 16:53:05,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:05,745 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:05,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:05,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:05,948 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 16:53:05,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:05,948 INFO L85 PathProgramCache]: Analyzing trace with hash 170050242, now seen corresponding path program 38 times [2024-01-31 16:53:05,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:05,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215962797] [2024-01-31 16:53:05,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:05,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:06,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:07,129 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:07,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:07,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215962797] [2024-01-31 16:53:07,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215962797] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:07,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51113400] [2024-01-31 16:53:07,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:53:07,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:07,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:07,131 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 16:53:07,132 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 16:53:07,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:53:07,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:07,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-31 16:53:07,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:08,106 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:53:08,106 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 124 treesize of output 108 [2024-01-31 16:53:08,272 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:08,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:08,607 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:53:08,608 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 168 treesize of output 194 [2024-01-31 16:53:08,978 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:08,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51113400] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:08,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:08,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-01-31 16:53:08,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387675821] [2024-01-31 16:53:08,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:08,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:53:08,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:08,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:53:08,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:53:08,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:53:08,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 291 transitions, 6592 flow. Second operand has 20 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 0 states have call successors, (0), 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 16:53:08,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:08,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:53:08,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:10,463 INFO L124 PetriNetUnfolderBase]: 2547/5032 cut-off events. [2024-01-31 16:53:10,463 INFO L125 PetriNetUnfolderBase]: For 83902/83902 co-relation queries the response was YES. [2024-01-31 16:53:10,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29056 conditions, 5032 events. 2547/5032 cut-off events. For 83902/83902 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 38953 event pairs, 925 based on Foata normal form. 6/5016 useless extension candidates. Maximal degree in co-relation 29003. Up to 2320 conditions per place. [2024-01-31 16:53:10,499 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 226 selfloop transitions, 115 changer transitions 14/358 dead transitions. [2024-01-31 16:53:10,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 358 transitions, 7425 flow [2024-01-31 16:53:10,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 16:53:10,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 16:53:10,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 193 transitions. [2024-01-31 16:53:10,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3676190476190476 [2024-01-31 16:53:10,500 INFO L175 Difference]: Start difference. First operand has 304 places, 291 transitions, 6592 flow. Second operand 15 states and 193 transitions. [2024-01-31 16:53:10,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 358 transitions, 7425 flow [2024-01-31 16:53:10,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 358 transitions, 7365 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-01-31 16:53:10,651 INFO L231 Difference]: Finished difference. Result has 307 places, 284 transitions, 6577 flow [2024-01-31 16:53:10,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6382, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6577, PETRI_PLACES=307, PETRI_TRANSITIONS=284} [2024-01-31 16:53:10,652 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 276 predicate places. [2024-01-31 16:53:10,652 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 284 transitions, 6577 flow [2024-01-31 16:53:10,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 0 states have call successors, (0), 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 16:53:10,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:10,653 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:10,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-01-31 16:53:10,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:10,865 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 16:53:10,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:10,866 INFO L85 PathProgramCache]: Analyzing trace with hash -523595122, now seen corresponding path program 39 times [2024-01-31 16:53:10,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:10,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789109801] [2024-01-31 16:53:10,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:10,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:10,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:12,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:12,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789109801] [2024-01-31 16:53:12,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789109801] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:12,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844283053] [2024-01-31 16:53:12,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:53:12,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:12,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:12,034 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 16:53:12,036 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 16:53:12,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:53:12,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:12,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 42 conjunts are in the unsatisfiable core [2024-01-31 16:53:12,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:12,992 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:12,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:13,631 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:53:13,632 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 51 treesize of output 95 [2024-01-31 16:53:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:13,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844283053] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:13,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:13,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2024-01-31 16:53:13,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460102627] [2024-01-31 16:53:13,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:13,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:53:13,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:13,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:53:13,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:53:13,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:53:13,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 284 transitions, 6577 flow. Second operand has 21 states, 21 states have (on average 7.714285714285714) internal successors, (162), 21 states have internal predecessors, (162), 0 states have call successors, (0), 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 16:53:13,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:13,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:53:13,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:15,545 INFO L124 PetriNetUnfolderBase]: 2489/4922 cut-off events. [2024-01-31 16:53:15,545 INFO L125 PetriNetUnfolderBase]: For 87566/87566 co-relation queries the response was YES. [2024-01-31 16:53:15,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28828 conditions, 4922 events. 2489/4922 cut-off events. For 87566/87566 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 37687 event pairs, 423 based on Foata normal form. 24/4938 useless extension candidates. Maximal degree in co-relation 28776. Up to 1058 conditions per place. [2024-01-31 16:53:15,577 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 177 selfloop transitions, 170 changer transitions 20/370 dead transitions. [2024-01-31 16:53:15,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 370 transitions, 7548 flow [2024-01-31 16:53:15,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-31 16:53:15,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-31 16:53:15,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 283 transitions. [2024-01-31 16:53:15,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.310989010989011 [2024-01-31 16:53:15,579 INFO L175 Difference]: Start difference. First operand has 307 places, 284 transitions, 6577 flow. Second operand 26 states and 283 transitions. [2024-01-31 16:53:15,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 370 transitions, 7548 flow [2024-01-31 16:53:15,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 370 transitions, 7336 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-01-31 16:53:15,728 INFO L231 Difference]: Finished difference. Result has 319 places, 286 transitions, 6736 flow [2024-01-31 16:53:15,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6211, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6736, PETRI_PLACES=319, PETRI_TRANSITIONS=286} [2024-01-31 16:53:15,729 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 288 predicate places. [2024-01-31 16:53:15,729 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 286 transitions, 6736 flow [2024-01-31 16:53:15,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.714285714285714) internal successors, (162), 21 states have internal predecessors, (162), 0 states have call successors, (0), 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 16:53:15,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:15,729 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:15,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:15,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-01-31 16:53:15,943 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 16:53:15,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:15,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1486762306, now seen corresponding path program 40 times [2024-01-31 16:53:15,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:15,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475653703] [2024-01-31 16:53:15,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:15,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:16,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:17,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:17,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475653703] [2024-01-31 16:53:17,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475653703] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:17,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594945871] [2024-01-31 16:53:17,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:53:17,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:17,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:17,074 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:17,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-01-31 16:53:17,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:53:17,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:17,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 16:53:17,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:18,034 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:53:18,035 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 152 treesize of output 136 [2024-01-31 16:53:18,153 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:18,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:18,569 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:53:18,569 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 168 treesize of output 194 [2024-01-31 16:53:18,900 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:18,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594945871] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:18,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:18,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-01-31 16:53:18,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555740572] [2024-01-31 16:53:18,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:18,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:53:18,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:18,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:53:18,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:53:18,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:53:18,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 286 transitions, 6736 flow. Second operand has 20 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 0 states have call successors, (0), 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 16:53:18,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:18,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:53:18,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:20,261 INFO L124 PetriNetUnfolderBase]: 2435/4772 cut-off events. [2024-01-31 16:53:20,261 INFO L125 PetriNetUnfolderBase]: For 89869/89869 co-relation queries the response was YES. [2024-01-31 16:53:20,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28711 conditions, 4772 events. 2435/4772 cut-off events. For 89869/89869 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 36428 event pairs, 931 based on Foata normal form. 6/4756 useless extension candidates. Maximal degree in co-relation 28659. Up to 2296 conditions per place. [2024-01-31 16:53:20,298 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 202 selfloop transitions, 106 changer transitions 18/329 dead transitions. [2024-01-31 16:53:20,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 329 transitions, 7451 flow [2024-01-31 16:53:20,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:53:20,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:53:20,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2024-01-31 16:53:20,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523809523809524 [2024-01-31 16:53:20,299 INFO L175 Difference]: Start difference. First operand has 319 places, 286 transitions, 6736 flow. Second operand 12 states and 148 transitions. [2024-01-31 16:53:20,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 329 transitions, 7451 flow [2024-01-31 16:53:20,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 329 transitions, 7168 flow, removed 7 selfloop flow, removed 17 redundant places. [2024-01-31 16:53:20,454 INFO L231 Difference]: Finished difference. Result has 311 places, 280 transitions, 6496 flow [2024-01-31 16:53:20,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6351, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6496, PETRI_PLACES=311, PETRI_TRANSITIONS=280} [2024-01-31 16:53:20,455 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 280 predicate places. [2024-01-31 16:53:20,455 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 280 transitions, 6496 flow [2024-01-31 16:53:20,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.85) internal successors, (157), 20 states have internal predecessors, (157), 0 states have call successors, (0), 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 16:53:20,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:20,455 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:20,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:20,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-01-31 16:53:20,671 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 16:53:20,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:20,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1200461160, now seen corresponding path program 41 times [2024-01-31 16:53:20,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:20,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411992109] [2024-01-31 16:53:20,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:20,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:20,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:21,969 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:21,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:21,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411992109] [2024-01-31 16:53:21,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411992109] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:21,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104486694] [2024-01-31 16:53:21,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:53:21,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:21,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:21,973 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:21,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-01-31 16:53:22,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:53:22,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:22,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-31 16:53:22,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:22,991 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:22,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:23,613 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-31 16:53:23,614 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 44 treesize of output 75 [2024-01-31 16:53:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:23,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104486694] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:23,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:23,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-01-31 16:53:23,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869661776] [2024-01-31 16:53:23,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:23,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:53:23,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:23,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:53:23,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:53:23,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:53:23,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 280 transitions, 6496 flow. Second operand has 21 states, 21 states have (on average 7.857142857142857) internal successors, (165), 21 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 16:53:23,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:23,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:53:23,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:25,139 INFO L124 PetriNetUnfolderBase]: 2473/4839 cut-off events. [2024-01-31 16:53:25,139 INFO L125 PetriNetUnfolderBase]: For 93647/93647 co-relation queries the response was YES. [2024-01-31 16:53:25,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28767 conditions, 4839 events. 2473/4839 cut-off events. For 93647/93647 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 36966 event pairs, 399 based on Foata normal form. 24/4859 useless extension candidates. Maximal degree in co-relation 28715. Up to 1684 conditions per place. [2024-01-31 16:53:25,179 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 227 selfloop transitions, 98 changer transitions 9/337 dead transitions. [2024-01-31 16:53:25,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 337 transitions, 7620 flow [2024-01-31 16:53:25,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:53:25,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:53:25,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 162 transitions. [2024-01-31 16:53:25,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3306122448979592 [2024-01-31 16:53:25,181 INFO L175 Difference]: Start difference. First operand has 311 places, 280 transitions, 6496 flow. Second operand 14 states and 162 transitions. [2024-01-31 16:53:25,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 337 transitions, 7620 flow [2024-01-31 16:53:25,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 337 transitions, 7409 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-01-31 16:53:25,358 INFO L231 Difference]: Finished difference. Result has 312 places, 285 transitions, 6635 flow [2024-01-31 16:53:25,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6262, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6635, PETRI_PLACES=312, PETRI_TRANSITIONS=285} [2024-01-31 16:53:25,359 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 281 predicate places. [2024-01-31 16:53:25,359 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 285 transitions, 6635 flow [2024-01-31 16:53:25,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.857142857142857) internal successors, (165), 21 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 16:53:25,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:25,359 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:25,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-01-31 16:53:25,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-01-31 16:53:25,573 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 16:53:25,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:25,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1447462030, now seen corresponding path program 42 times [2024-01-31 16:53:25,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:25,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462613802] [2024-01-31 16:53:25,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:25,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:53:27,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:27,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462613802] [2024-01-31 16:53:27,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462613802] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:27,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008423419] [2024-01-31 16:53:27,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:53:27,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:27,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:27,048 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:27,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-01-31 16:53:27,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 16:53:27,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:27,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-31 16:53:27,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:27,972 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:53:27,973 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 157 treesize of output 137 [2024-01-31 16:53:28,225 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:28,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:28,783 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-31 16:53:28,784 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 44 treesize of output 75 [2024-01-31 16:53:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:28,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008423419] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:28,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:28,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 7] total 25 [2024-01-31 16:53:28,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329385279] [2024-01-31 16:53:28,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:28,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 16:53:28,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:28,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 16:53:28,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2024-01-31 16:53:28,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:53:28,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 285 transitions, 6635 flow. Second operand has 25 states, 25 states have (on average 7.52) internal successors, (188), 25 states have internal predecessors, (188), 0 states have call successors, (0), 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 16:53:28,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:28,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:53:28,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:30,438 INFO L124 PetriNetUnfolderBase]: 2419/4723 cut-off events. [2024-01-31 16:53:30,438 INFO L125 PetriNetUnfolderBase]: For 87961/87961 co-relation queries the response was YES. [2024-01-31 16:53:30,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28154 conditions, 4723 events. 2419/4723 cut-off events. For 87961/87961 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 36333 event pairs, 433 based on Foata normal form. 16/4735 useless extension candidates. Maximal degree in co-relation 28101. Up to 1898 conditions per place. [2024-01-31 16:53:30,475 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 217 selfloop transitions, 130 changer transitions 10/360 dead transitions. [2024-01-31 16:53:30,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 360 transitions, 7784 flow [2024-01-31 16:53:30,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 16:53:30,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 16:53:30,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 214 transitions. [2024-01-31 16:53:30,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3218045112781955 [2024-01-31 16:53:30,477 INFO L175 Difference]: Start difference. First operand has 312 places, 285 transitions, 6635 flow. Second operand 19 states and 214 transitions. [2024-01-31 16:53:30,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 360 transitions, 7784 flow [2024-01-31 16:53:30,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 360 transitions, 7492 flow, removed 19 selfloop flow, removed 15 redundant places. [2024-01-31 16:53:30,642 INFO L231 Difference]: Finished difference. Result has 317 places, 294 transitions, 6844 flow [2024-01-31 16:53:30,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6189, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6844, PETRI_PLACES=317, PETRI_TRANSITIONS=294} [2024-01-31 16:53:30,643 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 286 predicate places. [2024-01-31 16:53:30,643 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 294 transitions, 6844 flow [2024-01-31 16:53:30,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.52) internal successors, (188), 25 states have internal predecessors, (188), 0 states have call successors, (0), 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 16:53:30,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:30,643 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:30,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-01-31 16:53:30,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:30,857 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 16:53:30,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:30,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1489960856, now seen corresponding path program 43 times [2024-01-31 16:53:30,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:30,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644606330] [2024-01-31 16:53:30,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:30,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-01-31 16:53:32,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:32,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644606330] [2024-01-31 16:53:32,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644606330] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:32,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701034193] [2024-01-31 16:53:32,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:53:32,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:32,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:32,215 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:32,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-01-31 16:53:32,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:32,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-31 16:53:32,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:33,028 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:53:33,029 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 157 treesize of output 141 [2024-01-31 16:53:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:33,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:33,835 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-01-31 16:53:33,836 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 44 treesize of output 75 [2024-01-31 16:53:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:33,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701034193] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:33,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:33,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 8] total 23 [2024-01-31 16:53:33,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435478521] [2024-01-31 16:53:33,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:33,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:53:33,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:33,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:53:33,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:53:33,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:53:33,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 294 transitions, 6844 flow. Second operand has 23 states, 23 states have (on average 7.6521739130434785) internal successors, (176), 23 states have internal predecessors, (176), 0 states have call successors, (0), 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 16:53:33,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:33,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:53:33,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:35,583 INFO L124 PetriNetUnfolderBase]: 2365/4626 cut-off events. [2024-01-31 16:53:35,583 INFO L125 PetriNetUnfolderBase]: For 82340/82340 co-relation queries the response was YES. [2024-01-31 16:53:35,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27596 conditions, 4626 events. 2365/4626 cut-off events. For 82340/82340 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 35522 event pairs, 415 based on Foata normal form. 6/4628 useless extension candidates. Maximal degree in co-relation 27544. Up to 1050 conditions per place. [2024-01-31 16:53:35,618 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 166 selfloop transitions, 168 changer transitions 19/356 dead transitions. [2024-01-31 16:53:35,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 356 transitions, 7715 flow [2024-01-31 16:53:35,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 16:53:35,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 16:53:35,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 213 transitions. [2024-01-31 16:53:35,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32030075187969925 [2024-01-31 16:53:35,619 INFO L175 Difference]: Start difference. First operand has 317 places, 294 transitions, 6844 flow. Second operand 19 states and 213 transitions. [2024-01-31 16:53:35,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 356 transitions, 7715 flow [2024-01-31 16:53:35,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 356 transitions, 7510 flow, removed 34 selfloop flow, removed 15 redundant places. [2024-01-31 16:53:35,788 INFO L231 Difference]: Finished difference. Result has 317 places, 290 transitions, 6848 flow [2024-01-31 16:53:35,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6545, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6848, PETRI_PLACES=317, PETRI_TRANSITIONS=290} [2024-01-31 16:53:35,802 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 286 predicate places. [2024-01-31 16:53:35,802 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 290 transitions, 6848 flow [2024-01-31 16:53:35,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.6521739130434785) internal successors, (176), 23 states have internal predecessors, (176), 0 states have call successors, (0), 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 16:53:35,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:35,805 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 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 16:53:35,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-01-31 16:53:36,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:36,018 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 16:53:36,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:36,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1245454524, now seen corresponding path program 44 times [2024-01-31 16:53:36,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:36,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038723341] [2024-01-31 16:53:36,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:36,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:39,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:39,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038723341] [2024-01-31 16:53:39,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038723341] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:39,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869216381] [2024-01-31 16:53:39,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:53:39,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:39,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:39,344 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:39,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-01-31 16:53:39,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:53:39,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:39,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 62 conjunts are in the unsatisfiable core [2024-01-31 16:53:39,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:41,369 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:53:41,370 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 291 treesize of output 243 [2024-01-31 16:53:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-31 16:53:41,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:43,676 INFO L349 Elim1Store]: treesize reduction 13, result has 81.2 percent of original size [2024-01-31 16:53:43,676 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 369 treesize of output 334 [2024-01-31 16:53:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:44,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869216381] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:44,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:44,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 29 [2024-01-31 16:53:44,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961940971] [2024-01-31 16:53:44,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:44,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-31 16:53:44,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:44,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-31 16:53:44,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2024-01-31 16:53:44,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:53:44,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 290 transitions, 6848 flow. Second operand has 29 states, 29 states have (on average 7.586206896551724) internal successors, (220), 29 states have internal predecessors, (220), 0 states have call successors, (0), 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 16:53:44,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:44,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:53:44,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:46,628 INFO L124 PetriNetUnfolderBase]: 3059/6022 cut-off events. [2024-01-31 16:53:46,628 INFO L125 PetriNetUnfolderBase]: For 110589/110589 co-relation queries the response was YES. [2024-01-31 16:53:46,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35796 conditions, 6022 events. 3059/6022 cut-off events. For 110589/110589 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 47893 event pairs, 837 based on Foata normal form. 1/6021 useless extension candidates. Maximal degree in co-relation 35747. Up to 1304 conditions per place. [2024-01-31 16:53:46,676 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 253 selfloop transitions, 149 changer transitions 8/413 dead transitions. [2024-01-31 16:53:46,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 413 transitions, 9585 flow [2024-01-31 16:53:46,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 16:53:46,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 16:53:46,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 171 transitions. [2024-01-31 16:53:46,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3758241758241758 [2024-01-31 16:53:46,677 INFO L175 Difference]: Start difference. First operand has 317 places, 290 transitions, 6848 flow. Second operand 13 states and 171 transitions. [2024-01-31 16:53:46,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 413 transitions, 9585 flow [2024-01-31 16:53:46,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 413 transitions, 9344 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-01-31 16:53:46,879 INFO L231 Difference]: Finished difference. Result has 313 places, 317 transitions, 7762 flow [2024-01-31 16:53:46,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6650, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7762, PETRI_PLACES=313, PETRI_TRANSITIONS=317} [2024-01-31 16:53:46,880 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 282 predicate places. [2024-01-31 16:53:46,880 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 317 transitions, 7762 flow [2024-01-31 16:53:46,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.586206896551724) internal successors, (220), 29 states have internal predecessors, (220), 0 states have call successors, (0), 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 16:53:46,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:46,880 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 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 16:53:46,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:47,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:47,095 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 16:53:47,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:47,095 INFO L85 PathProgramCache]: Analyzing trace with hash 393652736, now seen corresponding path program 45 times [2024-01-31 16:53:47,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:47,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874939973] [2024-01-31 16:53:47,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:47,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:50,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:50,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874939973] [2024-01-31 16:53:50,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874939973] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:50,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863201323] [2024-01-31 16:53:50,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:53:50,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:50,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:50,713 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:50,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-01-31 16:53:51,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:53:51,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:51,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 58 conjunts are in the unsatisfiable core [2024-01-31 16:53:51,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:52,723 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:53:52,724 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 364 treesize of output 292 [2024-01-31 16:53:53,331 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:53,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:55,278 INFO L349 Elim1Store]: treesize reduction 13, result has 81.2 percent of original size [2024-01-31 16:53:55,278 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 384 treesize of output 349 [2024-01-31 16:53:56,207 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:56,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863201323] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:56,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:56,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 28 [2024-01-31 16:53:56,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896708457] [2024-01-31 16:53:56,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:56,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 16:53:56,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:56,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 16:53:56,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2024-01-31 16:53:56,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:53:56,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 317 transitions, 7762 flow. Second operand has 28 states, 28 states have (on average 7.5) internal successors, (210), 28 states have internal predecessors, (210), 0 states have call successors, (0), 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 16:53:56,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:56,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:53:56,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:59,632 INFO L124 PetriNetUnfolderBase]: 3163/6206 cut-off events. [2024-01-31 16:53:59,633 INFO L125 PetriNetUnfolderBase]: For 122391/122391 co-relation queries the response was YES. [2024-01-31 16:53:59,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37517 conditions, 6206 events. 3163/6206 cut-off events. For 122391/122391 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 49346 event pairs, 799 based on Foata normal form. 3/6207 useless extension candidates. Maximal degree in co-relation 37463. Up to 1280 conditions per place. [2024-01-31 16:53:59,676 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 260 selfloop transitions, 173 changer transitions 26/462 dead transitions. [2024-01-31 16:53:59,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 462 transitions, 10200 flow [2024-01-31 16:53:59,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 16:53:59,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 16:53:59,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 276 transitions. [2024-01-31 16:53:59,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35844155844155845 [2024-01-31 16:53:59,678 INFO L175 Difference]: Start difference. First operand has 313 places, 317 transitions, 7762 flow. Second operand 22 states and 276 transitions. [2024-01-31 16:53:59,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 462 transitions, 10200 flow [2024-01-31 16:53:59,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 462 transitions, 10071 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-01-31 16:53:59,886 INFO L231 Difference]: Finished difference. Result has 336 places, 332 transitions, 8393 flow [2024-01-31 16:53:59,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=7633, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8393, PETRI_PLACES=336, PETRI_TRANSITIONS=332} [2024-01-31 16:53:59,886 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 305 predicate places. [2024-01-31 16:53:59,886 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 332 transitions, 8393 flow [2024-01-31 16:53:59,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.5) internal successors, (210), 28 states have internal predecessors, (210), 0 states have call successors, (0), 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 16:53:59,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:59,887 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 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 16:53:59,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-01-31 16:54:00,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-01-31 16:54:00,095 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 16:54:00,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:00,096 INFO L85 PathProgramCache]: Analyzing trace with hash 110152226, now seen corresponding path program 46 times [2024-01-31 16:54:00,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:00,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295876576] [2024-01-31 16:54:00,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:00,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:00,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-01-31 16:54:03,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:03,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295876576] [2024-01-31 16:54:03,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295876576] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:03,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160913685] [2024-01-31 16:54:03,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:54:03,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:03,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:03,350 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:03,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-01-31 16:54:04,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:54:04,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:54:04,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 54 conjunts are in the unsatisfiable core [2024-01-31 16:54:04,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:05,295 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:54:05,296 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 385 treesize of output 299 [2024-01-31 16:54:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:54:05,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:07,869 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:54:07,870 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 448 treesize of output 413 [2024-01-31 16:54:09,032 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:54:09,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160913685] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:54:09,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:54:09,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 10] total 32 [2024-01-31 16:54:09,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709909911] [2024-01-31 16:54:09,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:54:09,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-31 16:54:09,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:54:09,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-31 16:54:09,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2024-01-31 16:54:09,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:54:09,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 332 transitions, 8393 flow. Second operand has 32 states, 32 states have (on average 7.53125) internal successors, (241), 32 states have internal predecessors, (241), 0 states have call successors, (0), 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 16:54:09,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:54:09,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:54:09,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:12,158 INFO L124 PetriNetUnfolderBase]: 3227/6341 cut-off events. [2024-01-31 16:54:12,158 INFO L125 PetriNetUnfolderBase]: For 132583/132583 co-relation queries the response was YES. [2024-01-31 16:54:12,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39185 conditions, 6341 events. 3227/6341 cut-off events. For 132583/132583 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 50812 event pairs, 981 based on Foata normal form. 3/6340 useless extension candidates. Maximal degree in co-relation 39124. Up to 2353 conditions per place. [2024-01-31 16:54:12,216 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 227 selfloop transitions, 170 changer transitions 26/426 dead transitions. [2024-01-31 16:54:12,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 426 transitions, 9895 flow [2024-01-31 16:54:12,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 16:54:12,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 16:54:12,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 254 transitions. [2024-01-31 16:54:12,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32987012987012987 [2024-01-31 16:54:12,230 INFO L175 Difference]: Start difference. First operand has 336 places, 332 transitions, 8393 flow. Second operand 22 states and 254 transitions. [2024-01-31 16:54:12,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 426 transitions, 9895 flow [2024-01-31 16:54:12,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 426 transitions, 9517 flow, removed 24 selfloop flow, removed 14 redundant places. [2024-01-31 16:54:12,510 INFO L231 Difference]: Finished difference. Result has 351 places, 346 transitions, 8775 flow [2024-01-31 16:54:12,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=8027, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8775, PETRI_PLACES=351, PETRI_TRANSITIONS=346} [2024-01-31 16:54:12,510 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 320 predicate places. [2024-01-31 16:54:12,510 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 346 transitions, 8775 flow [2024-01-31 16:54:12,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 7.53125) internal successors, (241), 32 states have internal predecessors, (241), 0 states have call successors, (0), 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 16:54:12,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:54:12,511 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 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 16:54:12,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2024-01-31 16:54:12,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-01-31 16:54:12,725 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 16:54:12,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:12,725 INFO L85 PathProgramCache]: Analyzing trace with hash 108976434, now seen corresponding path program 47 times [2024-01-31 16:54:12,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:12,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196523048] [2024-01-31 16:54:12,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:12,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:16,109 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:54:16,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:16,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196523048] [2024-01-31 16:54:16,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196523048] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:16,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553490303] [2024-01-31 16:54:16,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:54:16,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:16,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:16,111 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:16,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-01-31 16:54:16,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:54:16,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:54:16,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 56 conjunts are in the unsatisfiable core [2024-01-31 16:54:16,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:17,756 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:54:17,756 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 340 treesize of output 276 [2024-01-31 16:54:18,543 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:54:18,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:20,508 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:54:20,508 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 378 treesize of output 356 [2024-01-31 16:54:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:54:21,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553490303] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:54:21,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:54:21,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 30 [2024-01-31 16:54:21,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394362966] [2024-01-31 16:54:21,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:54:21,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-31 16:54:21,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:54:21,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-31 16:54:21,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2024-01-31 16:54:21,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:54:21,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 346 transitions, 8775 flow. Second operand has 30 states, 30 states have (on average 7.633333333333334) internal successors, (229), 30 states have internal predecessors, (229), 0 states have call successors, (0), 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 16:54:21,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:54:21,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:54:21,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:25,901 INFO L124 PetriNetUnfolderBase]: 3539/6940 cut-off events. [2024-01-31 16:54:25,902 INFO L125 PetriNetUnfolderBase]: For 148012/148012 co-relation queries the response was YES. [2024-01-31 16:54:25,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43085 conditions, 6940 events. 3539/6940 cut-off events. For 148012/148012 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 56120 event pairs, 687 based on Foata normal form. 4/6936 useless extension candidates. Maximal degree in co-relation 43018. Up to 2184 conditions per place. [2024-01-31 16:54:25,971 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 263 selfloop transitions, 238 changer transitions 45/549 dead transitions. [2024-01-31 16:54:25,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 549 transitions, 11628 flow [2024-01-31 16:54:25,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-01-31 16:54:25,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-01-31 16:54:25,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 450 transitions. [2024-01-31 16:54:25,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32967032967032966 [2024-01-31 16:54:25,973 INFO L175 Difference]: Start difference. First operand has 351 places, 346 transitions, 8775 flow. Second operand 39 states and 450 transitions. [2024-01-31 16:54:25,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 549 transitions, 11628 flow [2024-01-31 16:54:26,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 549 transitions, 11340 flow, removed 38 selfloop flow, removed 12 redundant places. [2024-01-31 16:54:26,288 INFO L231 Difference]: Finished difference. Result has 386 places, 388 transitions, 10172 flow [2024-01-31 16:54:26,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=8503, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=10172, PETRI_PLACES=386, PETRI_TRANSITIONS=388} [2024-01-31 16:54:26,289 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 355 predicate places. [2024-01-31 16:54:26,289 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 388 transitions, 10172 flow [2024-01-31 16:54:26,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 7.633333333333334) internal successors, (229), 30 states have internal predecessors, (229), 0 states have call successors, (0), 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 16:54:26,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:54:26,289 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 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 16:54:26,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2024-01-31 16:54:26,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:26,503 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 16:54:26,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:26,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1707325208, now seen corresponding path program 48 times [2024-01-31 16:54:26,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:26,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112087726] [2024-01-31 16:54:26,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:26,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:29,640 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:54:29,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:29,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112087726] [2024-01-31 16:54:29,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112087726] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:29,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500957744] [2024-01-31 16:54:29,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:54:29,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:29,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:29,642 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:29,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-01-31 16:54:30,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 16:54:30,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:54:30,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 58 conjunts are in the unsatisfiable core [2024-01-31 16:54:30,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:31,120 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:54:31,120 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 346 treesize of output 286 [2024-01-31 16:54:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:54:31,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:33,803 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:54:33,803 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 378 treesize of output 356 [2024-01-31 16:54:34,747 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:54:34,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500957744] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:54:34,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:54:34,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 26 [2024-01-31 16:54:34,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132164081] [2024-01-31 16:54:34,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:54:34,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-31 16:54:34,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:54:34,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-31 16:54:34,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2024-01-31 16:54:34,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:54:34,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 388 transitions, 10172 flow. Second operand has 26 states, 26 states have (on average 7.653846153846154) internal successors, (199), 26 states have internal predecessors, (199), 0 states have call successors, (0), 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 16:54:34,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:54:34,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:54:34,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:38,142 INFO L124 PetriNetUnfolderBase]: 3749/7397 cut-off events. [2024-01-31 16:54:38,142 INFO L125 PetriNetUnfolderBase]: For 170354/170354 co-relation queries the response was YES. [2024-01-31 16:54:38,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46693 conditions, 7397 events. 3749/7397 cut-off events. For 170354/170354 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 60686 event pairs, 1149 based on Foata normal form. 4/7397 useless extension candidates. Maximal degree in co-relation 46617. Up to 2758 conditions per place. [2024-01-31 16:54:38,201 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 309 selfloop transitions, 185 changer transitions 32/529 dead transitions. [2024-01-31 16:54:38,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 529 transitions, 12471 flow [2024-01-31 16:54:38,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-31 16:54:38,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-31 16:54:38,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 318 transitions. [2024-01-31 16:54:38,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34945054945054943 [2024-01-31 16:54:38,202 INFO L175 Difference]: Start difference. First operand has 386 places, 388 transitions, 10172 flow. Second operand 26 states and 318 transitions. [2024-01-31 16:54:38,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 529 transitions, 12471 flow [2024-01-31 16:54:38,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 529 transitions, 12029 flow, removed 136 selfloop flow, removed 16 redundant places. [2024-01-31 16:54:38,549 INFO L231 Difference]: Finished difference. Result has 400 places, 413 transitions, 10811 flow [2024-01-31 16:54:38,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=9762, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=10811, PETRI_PLACES=400, PETRI_TRANSITIONS=413} [2024-01-31 16:54:38,549 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 369 predicate places. [2024-01-31 16:54:38,549 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 413 transitions, 10811 flow [2024-01-31 16:54:38,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.653846153846154) internal successors, (199), 26 states have internal predecessors, (199), 0 states have call successors, (0), 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 16:54:38,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:54:38,550 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 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 16:54:38,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-01-31 16:54:38,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-01-31 16:54:38,766 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 16:54:38,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:38,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1841000788, now seen corresponding path program 49 times [2024-01-31 16:54:38,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:38,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793083501] [2024-01-31 16:54:38,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:38,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:38,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:41,894 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:54:41,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:41,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793083501] [2024-01-31 16:54:41,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793083501] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:41,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887483396] [2024-01-31 16:54:41,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:54:41,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:41,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:41,895 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:41,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-01-31 16:54:42,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:42,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 48 conjunts are in the unsatisfiable core [2024-01-31 16:54:42,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:43,358 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:54:43,359 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 392 treesize of output 296 [2024-01-31 16:54:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:54:44,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:45,960 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:54:45,961 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 384 treesize of output 362 [2024-01-31 16:54:46,824 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:54:46,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887483396] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:54:46,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:54:46,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-01-31 16:54:46,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419933036] [2024-01-31 16:54:46,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:54:46,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 16:54:46,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:54:46,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 16:54:46,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2024-01-31 16:54:46,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:54:46,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 413 transitions, 10811 flow. Second operand has 28 states, 28 states have (on average 7.357142857142857) internal successors, (206), 28 states have internal predecessors, (206), 0 states have call successors, (0), 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 16:54:46,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:54:46,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:54:46,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:51,356 INFO L124 PetriNetUnfolderBase]: 4055/8019 cut-off events. [2024-01-31 16:54:51,357 INFO L125 PetriNetUnfolderBase]: For 194664/194664 co-relation queries the response was YES. [2024-01-31 16:54:51,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50464 conditions, 8019 events. 4055/8019 cut-off events. For 194664/194664 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 66616 event pairs, 1215 based on Foata normal form. 6/8019 useless extension candidates. Maximal degree in co-relation 50383. Up to 2938 conditions per place. [2024-01-31 16:54:51,435 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 354 selfloop transitions, 193 changer transitions 56/606 dead transitions. [2024-01-31 16:54:51,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 606 transitions, 13675 flow [2024-01-31 16:54:51,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-31 16:54:51,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-31 16:54:51,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 414 transitions. [2024-01-31 16:54:51,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3379591836734694 [2024-01-31 16:54:51,437 INFO L175 Difference]: Start difference. First operand has 400 places, 413 transitions, 10811 flow. Second operand 35 states and 414 transitions. [2024-01-31 16:54:51,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 606 transitions, 13675 flow [2024-01-31 16:54:52,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 606 transitions, 13442 flow, removed 75 selfloop flow, removed 13 redundant places. [2024-01-31 16:54:52,081 INFO L231 Difference]: Finished difference. Result has 438 places, 448 transitions, 12106 flow [2024-01-31 16:54:52,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=10586, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=12106, PETRI_PLACES=438, PETRI_TRANSITIONS=448} [2024-01-31 16:54:52,082 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 407 predicate places. [2024-01-31 16:54:52,082 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 448 transitions, 12106 flow [2024-01-31 16:54:52,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.357142857142857) internal successors, (206), 28 states have internal predecessors, (206), 0 states have call successors, (0), 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 16:54:52,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:54:52,082 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 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 16:54:52,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2024-01-31 16:54:52,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-01-31 16:54:52,298 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 16:54:52,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:52,299 INFO L85 PathProgramCache]: Analyzing trace with hash 362186742, now seen corresponding path program 50 times [2024-01-31 16:54:52,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:52,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150388315] [2024-01-31 16:54:52,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:52,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:52,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:55,223 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:54:55,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:55,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150388315] [2024-01-31 16:54:55,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150388315] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:55,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481317873] [2024-01-31 16:54:55,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:54:55,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:55,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:55,225 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:55,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-01-31 16:54:55,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:54:55,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:54:55,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 58 conjunts are in the unsatisfiable core [2024-01-31 16:54:55,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:56,798 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:54:56,799 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 326 treesize of output 274 [2024-01-31 16:54:57,614 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:54:57,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:59,433 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:54:59,433 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 378 treesize of output 356 [2024-01-31 16:55:00,351 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:55:00,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481317873] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:55:00,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:55:00,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 29 [2024-01-31 16:55:00,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668121484] [2024-01-31 16:55:00,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:55:00,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-31 16:55:00,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:55:00,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-31 16:55:00,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2024-01-31 16:55:00,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:55:00,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 448 transitions, 12106 flow. Second operand has 29 states, 29 states have (on average 7.448275862068965) internal successors, (216), 29 states have internal predecessors, (216), 0 states have call successors, (0), 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 16:55:00,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:55:00,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:55:00,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:55:04,088 INFO L124 PetriNetUnfolderBase]: 4369/8648 cut-off events. [2024-01-31 16:55:04,088 INFO L125 PetriNetUnfolderBase]: For 235528/235528 co-relation queries the response was YES. [2024-01-31 16:55:04,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56156 conditions, 8648 events. 4369/8648 cut-off events. For 235528/235528 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 72485 event pairs, 1719 based on Foata normal form. 6/8646 useless extension candidates. Maximal degree in co-relation 56058. Up to 3211 conditions per place. [2024-01-31 16:55:04,186 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 439 selfloop transitions, 144 changer transitions 25/611 dead transitions. [2024-01-31 16:55:04,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 611 transitions, 15242 flow [2024-01-31 16:55:04,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-31 16:55:04,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-31 16:55:04,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 315 transitions. [2024-01-31 16:55:04,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36 [2024-01-31 16:55:04,188 INFO L175 Difference]: Start difference. First operand has 438 places, 448 transitions, 12106 flow. Second operand 25 states and 315 transitions. [2024-01-31 16:55:04,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 611 transitions, 15242 flow [2024-01-31 16:55:04,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 611 transitions, 14934 flow, removed 129 selfloop flow, removed 11 redundant places. [2024-01-31 16:55:04,834 INFO L231 Difference]: Finished difference. Result has 453 places, 483 transitions, 13209 flow [2024-01-31 16:55:04,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=11830, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=13209, PETRI_PLACES=453, PETRI_TRANSITIONS=483} [2024-01-31 16:55:04,834 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 422 predicate places. [2024-01-31 16:55:04,834 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 483 transitions, 13209 flow [2024-01-31 16:55:04,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.448275862068965) internal successors, (216), 29 states have internal predecessors, (216), 0 states have call successors, (0), 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 16:55:04,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:55:04,835 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 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 16:55:04,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2024-01-31 16:55:05,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:55:05,038 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 16:55:05,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:55:05,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1994063610, now seen corresponding path program 51 times [2024-01-31 16:55:05,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:55:05,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239300005] [2024-01-31 16:55:05,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:55:05,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:55:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:55:08,318 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:55:08,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:55:08,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239300005] [2024-01-31 16:55:08,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239300005] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:55:08,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22707688] [2024-01-31 16:55:08,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:55:08,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:55:08,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:55:08,320 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:55:08,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-01-31 16:55:09,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-01-31 16:55:09,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:55:09,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 61 conjunts are in the unsatisfiable core [2024-01-31 16:55:09,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:55:10,307 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:55:10,308 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 367 treesize of output 295 [2024-01-31 16:55:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:55:10,914 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:55:12,643 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:55:12,643 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 417 treesize of output 395 [2024-01-31 16:55:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:55:13,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22707688] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:55:13,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:55:13,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 28 [2024-01-31 16:55:13,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474276180] [2024-01-31 16:55:13,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:55:13,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 16:55:13,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:55:13,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 16:55:13,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2024-01-31 16:55:13,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:55:13,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 483 transitions, 13209 flow. Second operand has 28 states, 28 states have (on average 7.535714285714286) internal successors, (211), 28 states have internal predecessors, (211), 0 states have call successors, (0), 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 16:55:13,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:55:13,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:55:13,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:55:18,321 INFO L124 PetriNetUnfolderBase]: 4573/9064 cut-off events. [2024-01-31 16:55:18,322 INFO L125 PetriNetUnfolderBase]: For 260345/260345 co-relation queries the response was YES. [2024-01-31 16:55:18,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59393 conditions, 9064 events. 4573/9064 cut-off events. For 260345/260345 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 76775 event pairs, 1311 based on Foata normal form. 3/9057 useless extension candidates. Maximal degree in co-relation 59293. Up to 3507 conditions per place. [2024-01-31 16:55:18,420 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 380 selfloop transitions, 236 changer transitions 34/653 dead transitions. [2024-01-31 16:55:18,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 653 transitions, 16080 flow [2024-01-31 16:55:18,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-31 16:55:18,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-31 16:55:18,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 402 transitions. [2024-01-31 16:55:18,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32816326530612244 [2024-01-31 16:55:18,421 INFO L175 Difference]: Start difference. First operand has 453 places, 483 transitions, 13209 flow. Second operand 35 states and 402 transitions. [2024-01-31 16:55:18,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 653 transitions, 16080 flow [2024-01-31 16:55:19,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 653 transitions, 15760 flow, removed 148 selfloop flow, removed 8 redundant places. [2024-01-31 16:55:19,135 INFO L231 Difference]: Finished difference. Result has 486 places, 513 transitions, 14407 flow [2024-01-31 16:55:19,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=12901, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=14407, PETRI_PLACES=486, PETRI_TRANSITIONS=513} [2024-01-31 16:55:19,136 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 455 predicate places. [2024-01-31 16:55:19,136 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 513 transitions, 14407 flow [2024-01-31 16:55:19,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.535714285714286) internal successors, (211), 28 states have internal predecessors, (211), 0 states have call successors, (0), 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 16:55:19,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:55:19,136 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 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 16:55:19,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2024-01-31 16:55:19,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:55:19,351 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 16:55:19,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:55:19,351 INFO L85 PathProgramCache]: Analyzing trace with hash 534446010, now seen corresponding path program 52 times [2024-01-31 16:55:19,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:55:19,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709158954] [2024-01-31 16:55:19,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:55:19,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:55:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:55:22,616 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:55:22,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:55:22,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709158954] [2024-01-31 16:55:22,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709158954] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:55:22,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469692289] [2024-01-31 16:55:22,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:55:22,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:55:22,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:55:22,618 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:55:22,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-01-31 16:55:23,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:55:23,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:55:23,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 54 conjunts are in the unsatisfiable core [2024-01-31 16:55:23,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:55:24,498 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:55:24,498 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 366 treesize of output 284 [2024-01-31 16:55:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:55:25,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:55:27,054 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:55:27,054 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 422 treesize of output 401 [2024-01-31 16:55:28,405 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:55:28,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469692289] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:55:28,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:55:28,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 30 [2024-01-31 16:55:28,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132607056] [2024-01-31 16:55:28,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:55:28,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-31 16:55:28,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:55:28,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-31 16:55:28,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2024-01-31 16:55:28,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:55:28,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 513 transitions, 14407 flow. Second operand has 30 states, 30 states have (on average 7.633333333333334) internal successors, (229), 30 states have internal predecessors, (229), 0 states have call successors, (0), 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 16:55:28,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:55:28,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:55:28,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:55:35,108 INFO L124 PetriNetUnfolderBase]: 5145/10171 cut-off events. [2024-01-31 16:55:35,108 INFO L125 PetriNetUnfolderBase]: For 322895/322895 co-relation queries the response was YES. [2024-01-31 16:55:35,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68278 conditions, 10171 events. 5145/10171 cut-off events. For 322895/322895 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 87752 event pairs, 1831 based on Foata normal form. 3/10154 useless extension candidates. Maximal degree in co-relation 68171. Up to 3714 conditions per place. [2024-01-31 16:55:35,217 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 464 selfloop transitions, 202 changer transitions 42/711 dead transitions. [2024-01-31 16:55:35,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 711 transitions, 18156 flow [2024-01-31 16:55:35,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-01-31 16:55:35,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-01-31 16:55:35,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 404 transitions. [2024-01-31 16:55:35,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33949579831932775 [2024-01-31 16:55:35,218 INFO L175 Difference]: Start difference. First operand has 486 places, 513 transitions, 14407 flow. Second operand 34 states and 404 transitions. [2024-01-31 16:55:35,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 711 transitions, 18156 flow [2024-01-31 16:55:36,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 711 transitions, 17761 flow, removed 157 selfloop flow, removed 15 redundant places. [2024-01-31 16:55:36,096 INFO L231 Difference]: Finished difference. Result has 514 places, 560 transitions, 16115 flow [2024-01-31 16:55:36,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=14024, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=16115, PETRI_PLACES=514, PETRI_TRANSITIONS=560} [2024-01-31 16:55:36,097 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 483 predicate places. [2024-01-31 16:55:36,097 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 560 transitions, 16115 flow [2024-01-31 16:55:36,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 7.633333333333334) internal successors, (229), 30 states have internal predecessors, (229), 0 states have call successors, (0), 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 16:55:36,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:55:36,097 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 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 16:55:36,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2024-01-31 16:55:36,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-01-31 16:55:36,311 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 16:55:36,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:55:36,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1491293428, now seen corresponding path program 53 times [2024-01-31 16:55:36,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:55:36,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111705574] [2024-01-31 16:55:36,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:55:36,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:55:36,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:55:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:55:39,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:55:39,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111705574] [2024-01-31 16:55:39,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111705574] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:55:39,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99742312] [2024-01-31 16:55:39,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:55:39,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:55:39,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:55:39,834 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:55:39,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-01-31 16:55:40,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:55:40,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:55:40,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 58 conjunts are in the unsatisfiable core [2024-01-31 16:55:40,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:55:42,129 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:55:42,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 323 treesize of output 271 [2024-01-31 16:55:42,593 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:55:42,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:55:45,923 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:55:45,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 292 treesize of output 281 [2024-01-31 16:55:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:55:46,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99742312] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:55:46,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:55:46,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 30 [2024-01-31 16:55:46,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926244336] [2024-01-31 16:55:46,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:55:46,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-31 16:55:46,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:55:46,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-31 16:55:46,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2024-01-31 16:55:46,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:55:46,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 560 transitions, 16115 flow. Second operand has 30 states, 30 states have (on average 7.633333333333334) internal successors, (229), 30 states have internal predecessors, (229), 0 states have call successors, (0), 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 16:55:46,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:55:46,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:55:46,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:55:51,717 INFO L124 PetriNetUnfolderBase]: 5143/10205 cut-off events. [2024-01-31 16:55:51,717 INFO L125 PetriNetUnfolderBase]: For 338687/338687 co-relation queries the response was YES. [2024-01-31 16:55:51,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69569 conditions, 10205 events. 5143/10205 cut-off events. For 338687/338687 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 88769 event pairs, 2079 based on Foata normal form. 2/10195 useless extension candidates. Maximal degree in co-relation 69452. Up to 6260 conditions per place. [2024-01-31 16:55:51,837 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 445 selfloop transitions, 190 changer transitions 33/671 dead transitions. [2024-01-31 16:55:51,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 671 transitions, 18189 flow [2024-01-31 16:55:51,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-31 16:55:51,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-31 16:55:51,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 304 transitions. [2024-01-31 16:55:51,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33406593406593404 [2024-01-31 16:55:51,839 INFO L175 Difference]: Start difference. First operand has 514 places, 560 transitions, 16115 flow. Second operand 26 states and 304 transitions. [2024-01-31 16:55:51,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 671 transitions, 18189 flow [2024-01-31 16:55:52,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 671 transitions, 17663 flow, removed 232 selfloop flow, removed 17 redundant places. [2024-01-31 16:55:52,939 INFO L231 Difference]: Finished difference. Result has 523 places, 569 transitions, 16346 flow [2024-01-31 16:55:52,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=15633, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=16346, PETRI_PLACES=523, PETRI_TRANSITIONS=569} [2024-01-31 16:55:52,940 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 492 predicate places. [2024-01-31 16:55:52,940 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 569 transitions, 16346 flow [2024-01-31 16:55:52,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 7.633333333333334) internal successors, (229), 30 states have internal predecessors, (229), 0 states have call successors, (0), 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 16:55:52,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:55:52,940 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 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 16:55:52,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2024-01-31 16:55:53,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:55:53,149 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 16:55:53,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:55:53,150 INFO L85 PathProgramCache]: Analyzing trace with hash 908184314, now seen corresponding path program 54 times [2024-01-31 16:55:53,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:55:53,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699019778] [2024-01-31 16:55:53,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:55:53,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:55:53,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:55:56,295 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:55:56,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:55:56,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699019778] [2024-01-31 16:55:56,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699019778] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:55:56,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614396608] [2024-01-31 16:55:56,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:55:56,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:55:56,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:55:56,297 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:55:56,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-01-31 16:55:57,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 16:55:57,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:55:57,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 58 conjunts are in the unsatisfiable core [2024-01-31 16:55:57,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:55:58,424 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:55:58,425 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 302 treesize of output 250 [2024-01-31 16:55:58,807 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:55:58,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:56:01,187 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:56:01,187 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 436 treesize of output 401 [2024-01-31 16:56:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:56:02,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614396608] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:56:02,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:56:02,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 29 [2024-01-31 16:56:02,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560239111] [2024-01-31 16:56:02,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:56:02,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-31 16:56:02,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:56:02,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-31 16:56:02,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2024-01-31 16:56:02,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:56:02,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 569 transitions, 16346 flow. Second operand has 29 states, 29 states have (on average 7.448275862068965) internal successors, (216), 29 states have internal predecessors, (216), 0 states have call successors, (0), 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 16:56:02,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:56:02,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:56:02,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:56:08,390 INFO L124 PetriNetUnfolderBase]: 5285/10522 cut-off events. [2024-01-31 16:56:08,390 INFO L125 PetriNetUnfolderBase]: For 349206/349206 co-relation queries the response was YES. [2024-01-31 16:56:08,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71146 conditions, 10522 events. 5285/10522 cut-off events. For 349206/349206 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 91614 event pairs, 1989 based on Foata normal form. 3/10515 useless extension candidates. Maximal degree in co-relation 71030. Up to 4412 conditions per place. [2024-01-31 16:56:08,509 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 500 selfloop transitions, 181 changer transitions 30/714 dead transitions. [2024-01-31 16:56:08,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 714 transitions, 18823 flow [2024-01-31 16:56:08,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-01-31 16:56:08,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-01-31 16:56:08,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 360 transitions. [2024-01-31 16:56:08,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3317972350230415 [2024-01-31 16:56:08,511 INFO L175 Difference]: Start difference. First operand has 523 places, 569 transitions, 16346 flow. Second operand 31 states and 360 transitions. [2024-01-31 16:56:08,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 714 transitions, 18823 flow [2024-01-31 16:56:09,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 714 transitions, 18652 flow, removed 32 selfloop flow, removed 15 redundant places. [2024-01-31 16:56:09,691 INFO L231 Difference]: Finished difference. Result has 543 places, 586 transitions, 17112 flow [2024-01-31 16:56:09,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=16171, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=17112, PETRI_PLACES=543, PETRI_TRANSITIONS=586} [2024-01-31 16:56:09,692 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 512 predicate places. [2024-01-31 16:56:09,692 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 586 transitions, 17112 flow [2024-01-31 16:56:09,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.448275862068965) internal successors, (216), 29 states have internal predecessors, (216), 0 states have call successors, (0), 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 16:56:09,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:56:09,692 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 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 16:56:09,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2024-01-31 16:56:09,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2024-01-31 16:56:09,906 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 16:56:09,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:56:09,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1408089630, now seen corresponding path program 55 times [2024-01-31 16:56:09,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:56:09,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143829971] [2024-01-31 16:56:09,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:56:09,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:56:10,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:56:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:56:13,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:56:13,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143829971] [2024-01-31 16:56:13,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143829971] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:56:13,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534548426] [2024-01-31 16:56:13,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:56:13,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:56:13,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:56:13,437 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:56:13,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-01-31 16:56:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:56:14,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 48 conjunts are in the unsatisfiable core [2024-01-31 16:56:14,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:56:15,007 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:56:15,007 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 356 treesize of output 278 [2024-01-31 16:56:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:56:15,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:56:17,663 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:56:17,663 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 394 treesize of output 365 [2024-01-31 16:56:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:56:18,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534548426] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:56:18,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:56:18,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 29 [2024-01-31 16:56:18,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540681659] [2024-01-31 16:56:18,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:56:18,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-31 16:56:18,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:56:18,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-31 16:56:18,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2024-01-31 16:56:18,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:56:18,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 586 transitions, 17112 flow. Second operand has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 29 states have internal predecessors, (215), 0 states have call successors, (0), 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 16:56:18,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:56:18,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:56:18,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:56:24,672 INFO L124 PetriNetUnfolderBase]: 5545/11008 cut-off events. [2024-01-31 16:56:24,673 INFO L125 PetriNetUnfolderBase]: For 391602/391602 co-relation queries the response was YES. [2024-01-31 16:56:24,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75911 conditions, 11008 events. 5545/11008 cut-off events. For 391602/391602 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 96703 event pairs, 1993 based on Foata normal form. 6/10978 useless extension candidates. Maximal degree in co-relation 75790. Up to 5020 conditions per place. [2024-01-31 16:56:24,794 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 500 selfloop transitions, 217 changer transitions 57/777 dead transitions. [2024-01-31 16:56:24,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 777 transitions, 20753 flow [2024-01-31 16:56:24,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-01-31 16:56:24,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-01-31 16:56:24,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 424 transitions. [2024-01-31 16:56:24,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3274131274131274 [2024-01-31 16:56:24,796 INFO L175 Difference]: Start difference. First operand has 543 places, 586 transitions, 17112 flow. Second operand 37 states and 424 transitions. [2024-01-31 16:56:24,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 777 transitions, 20753 flow [2024-01-31 16:56:26,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 562 places, 777 transitions, 20438 flow, removed 78 selfloop flow, removed 17 redundant places. [2024-01-31 16:56:26,031 INFO L231 Difference]: Finished difference. Result has 574 places, 618 transitions, 18430 flow [2024-01-31 16:56:26,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=16814, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=18430, PETRI_PLACES=574, PETRI_TRANSITIONS=618} [2024-01-31 16:56:26,031 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 543 predicate places. [2024-01-31 16:56:26,032 INFO L495 AbstractCegarLoop]: Abstraction has has 574 places, 618 transitions, 18430 flow [2024-01-31 16:56:26,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 29 states have internal predecessors, (215), 0 states have call successors, (0), 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 16:56:26,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:56:26,032 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 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 16:56:26,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2024-01-31 16:56:26,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2024-01-31 16:56:26,247 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 16:56:26,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:56:26,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1735149162, now seen corresponding path program 56 times [2024-01-31 16:56:26,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:56:26,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863646790] [2024-01-31 16:56:26,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:56:26,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:56:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:56:29,339 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:56:29,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:56:29,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863646790] [2024-01-31 16:56:29,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863646790] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:56:29,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072154450] [2024-01-31 16:56:29,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:56:29,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:56:29,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:56:29,341 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:56:29,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-01-31 16:56:30,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:56:30,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:56:30,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 58 conjunts are in the unsatisfiable core [2024-01-31 16:56:30,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:56:30,945 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:56:30,945 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 326 treesize of output 274 [2024-01-31 16:56:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:56:31,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:56:33,404 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:56:33,405 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 378 treesize of output 356 [2024-01-31 16:56:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:56:34,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072154450] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:56:34,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:56:34,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2024-01-31 16:56:34,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077811891] [2024-01-31 16:56:34,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:56:34,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 16:56:34,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:56:34,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 16:56:34,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2024-01-31 16:56:34,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:56:34,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 618 transitions, 18430 flow. Second operand has 27 states, 27 states have (on average 7.555555555555555) internal successors, (204), 27 states have internal predecessors, (204), 0 states have call successors, (0), 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 16:56:34,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:56:34,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:56:34,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:56:40,269 INFO L124 PetriNetUnfolderBase]: 5837/11565 cut-off events. [2024-01-31 16:56:40,269 INFO L125 PetriNetUnfolderBase]: For 448226/448226 co-relation queries the response was YES. [2024-01-31 16:56:40,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81590 conditions, 11565 events. 5837/11565 cut-off events. For 448226/448226 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 101957 event pairs, 2081 based on Foata normal form. 6/11535 useless extension candidates. Maximal degree in co-relation 81459. Up to 5232 conditions per place. [2024-01-31 16:56:40,415 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 518 selfloop transitions, 230 changer transitions 51/802 dead transitions. [2024-01-31 16:56:40,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 802 transitions, 22554 flow [2024-01-31 16:56:40,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-01-31 16:56:40,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-01-31 16:56:40,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 374 transitions. [2024-01-31 16:56:40,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34470046082949307 [2024-01-31 16:56:40,417 INFO L175 Difference]: Start difference. First operand has 574 places, 618 transitions, 18430 flow. Second operand 31 states and 374 transitions. [2024-01-31 16:56:40,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 802 transitions, 22554 flow [2024-01-31 16:56:42,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 583 places, 802 transitions, 22015 flow, removed 228 selfloop flow, removed 17 redundant places. [2024-01-31 16:56:42,198 INFO L231 Difference]: Finished difference. Result has 596 places, 654 transitions, 19906 flow [2024-01-31 16:56:42,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=17915, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=19906, PETRI_PLACES=596, PETRI_TRANSITIONS=654} [2024-01-31 16:56:42,200 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 565 predicate places. [2024-01-31 16:56:42,201 INFO L495 AbstractCegarLoop]: Abstraction has has 596 places, 654 transitions, 19906 flow [2024-01-31 16:56:42,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.555555555555555) internal successors, (204), 27 states have internal predecessors, (204), 0 states have call successors, (0), 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 16:56:42,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:56:42,201 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 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 16:56:42,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2024-01-31 16:56:42,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:56:42,416 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 16:56:42,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:56:42,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1242405636, now seen corresponding path program 57 times [2024-01-31 16:56:42,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:56:42,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329948701] [2024-01-31 16:56:42,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:56:42,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:56:42,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:56:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:46,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:56:46,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329948701] [2024-01-31 16:56:46,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329948701] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:56:46,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275946343] [2024-01-31 16:56:46,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:56:46,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:56:46,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:56:46,442 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:56:46,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-01-31 16:56:47,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:56:47,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:56:47,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 58 conjunts are in the unsatisfiable core [2024-01-31 16:56:47,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:56:48,387 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:56:48,388 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 333 treesize of output 273 [2024-01-31 16:56:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:56:48,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:56:50,400 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:56:50,401 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 417 treesize of output 395 [2024-01-31 16:56:51,693 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:56:51,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275946343] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:56:51,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:56:51,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 10] total 40 [2024-01-31 16:56:51,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082821360] [2024-01-31 16:56:51,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:56:51,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-01-31 16:56:51,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:56:51,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-01-31 16:56:51,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1415, Unknown=0, NotChecked=0, Total=1560 [2024-01-31 16:56:51,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:56:51,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 596 places, 654 transitions, 19906 flow. Second operand has 40 states, 40 states have (on average 7.05) internal successors, (282), 40 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:56:51,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:56:51,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:56:51,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:56:58,903 INFO L124 PetriNetUnfolderBase]: 6047/11998 cut-off events. [2024-01-31 16:56:58,903 INFO L125 PetriNetUnfolderBase]: For 493089/493089 co-relation queries the response was YES. [2024-01-31 16:56:59,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85921 conditions, 11998 events. 6047/11998 cut-off events. For 493089/493089 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 106897 event pairs, 2115 based on Foata normal form. 2/11964 useless extension candidates. Maximal degree in co-relation 85781. Up to 5372 conditions per place. [2024-01-31 16:56:59,060 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 545 selfloop transitions, 254 changer transitions 37/839 dead transitions. [2024-01-31 16:56:59,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 839 transitions, 23647 flow [2024-01-31 16:56:59,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-31 16:56:59,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-31 16:56:59,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 416 transitions. [2024-01-31 16:56:59,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3395918367346939 [2024-01-31 16:56:59,075 INFO L175 Difference]: Start difference. First operand has 596 places, 654 transitions, 19906 flow. Second operand 35 states and 416 transitions. [2024-01-31 16:56:59,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 839 transitions, 23647 flow [2024-01-31 16:57:01,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 613 places, 839 transitions, 22995 flow, removed 298 selfloop flow, removed 13 redundant places. [2024-01-31 16:57:01,023 INFO L231 Difference]: Finished difference. Result has 622 places, 680 transitions, 20939 flow [2024-01-31 16:57:01,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=19302, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=20939, PETRI_PLACES=622, PETRI_TRANSITIONS=680} [2024-01-31 16:57:01,024 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 591 predicate places. [2024-01-31 16:57:01,024 INFO L495 AbstractCegarLoop]: Abstraction has has 622 places, 680 transitions, 20939 flow [2024-01-31 16:57:01,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 7.05) internal successors, (282), 40 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:57:01,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:57:01,024 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 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 16:57:01,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2024-01-31 16:57:01,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:57:01,236 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 16:57:01,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:57:01,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1550082718, now seen corresponding path program 58 times [2024-01-31 16:57:01,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:57:01,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779142986] [2024-01-31 16:57:01,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:57:01,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:57:01,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:57:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:57:04,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:57:04,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779142986] [2024-01-31 16:57:04,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779142986] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:57:04,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820330737] [2024-01-31 16:57:04,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:57:04,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:57:04,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:57:04,562 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:57:04,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-01-31 16:57:05,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:57:05,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:57:05,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 58 conjunts are in the unsatisfiable core [2024-01-31 16:57:05,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:57:06,269 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:57:06,270 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 326 treesize of output 274 [2024-01-31 16:57:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:57:07,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:57:09,148 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:57:09,148 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 378 treesize of output 356 [2024-01-31 16:57:10,078 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:57:10,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820330737] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:57:10,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:57:10,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 29 [2024-01-31 16:57:10,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932338314] [2024-01-31 16:57:10,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:57:10,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-31 16:57:10,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:57:10,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-31 16:57:10,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2024-01-31 16:57:10,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:57:10,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 622 places, 680 transitions, 20939 flow. Second operand has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 29 states have internal predecessors, (215), 0 states have call successors, (0), 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 16:57:10,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:57:10,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:57:10,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:57:16,442 INFO L124 PetriNetUnfolderBase]: 6503/12999 cut-off events. [2024-01-31 16:57:16,442 INFO L125 PetriNetUnfolderBase]: For 565106/565106 co-relation queries the response was YES. [2024-01-31 16:57:16,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94081 conditions, 12999 events. 6503/12999 cut-off events. For 565106/565106 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 117575 event pairs, 2739 based on Foata normal form. 6/12997 useless extension candidates. Maximal degree in co-relation 93936. Up to 5778 conditions per place. [2024-01-31 16:57:16,729 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 659 selfloop transitions, 168 changer transitions 31/861 dead transitions. [2024-01-31 16:57:16,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 644 places, 861 transitions, 25630 flow [2024-01-31 16:57:16,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-31 16:57:16,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-31 16:57:16,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 325 transitions. [2024-01-31 16:57:16,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-01-31 16:57:16,731 INFO L175 Difference]: Start difference. First operand has 622 places, 680 transitions, 20939 flow. Second operand 25 states and 325 transitions. [2024-01-31 16:57:16,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 644 places, 861 transitions, 25630 flow [2024-01-31 16:57:18,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 622 places, 861 transitions, 24952 flow, removed 201 selfloop flow, removed 22 redundant places. [2024-01-31 16:57:19,002 INFO L231 Difference]: Finished difference. Result has 633 places, 717 transitions, 22272 flow [2024-01-31 16:57:19,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=20298, PETRI_DIFFERENCE_MINUEND_PLACES=598, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=22272, PETRI_PLACES=633, PETRI_TRANSITIONS=717} [2024-01-31 16:57:19,003 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 602 predicate places. [2024-01-31 16:57:19,003 INFO L495 AbstractCegarLoop]: Abstraction has has 633 places, 717 transitions, 22272 flow [2024-01-31 16:57:19,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.413793103448276) internal successors, (215), 29 states have internal predecessors, (215), 0 states have call successors, (0), 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 16:57:19,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:57:19,004 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 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 16:57:19,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2024-01-31 16:57:19,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2024-01-31 16:57:19,212 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 16:57:19,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:57:19,213 INFO L85 PathProgramCache]: Analyzing trace with hash -213601314, now seen corresponding path program 59 times [2024-01-31 16:57:19,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:57:19,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262665897] [2024-01-31 16:57:19,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:57:19,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:57:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:57:22,716 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:57:22,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:57:22,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262665897] [2024-01-31 16:57:22,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262665897] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:57:22,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636938554] [2024-01-31 16:57:22,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:57:22,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:57:22,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:57:22,718 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:57:22,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-01-31 16:57:23,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-01-31 16:57:23,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:57:23,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 56 conjunts are in the unsatisfiable core [2024-01-31 16:57:23,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:57:24,745 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:57:24,745 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 317 treesize of output 251 [2024-01-31 16:57:25,181 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:57:25,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:57:27,130 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:57:27,131 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 405 treesize of output 383 [2024-01-31 16:57:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:57:28,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636938554] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:57:28,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:57:28,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 30 [2024-01-31 16:57:28,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041758015] [2024-01-31 16:57:28,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:57:28,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-31 16:57:28,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:57:28,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-31 16:57:28,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2024-01-31 16:57:28,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-31 16:57:28,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 633 places, 717 transitions, 22272 flow. Second operand has 30 states, 30 states have (on average 7.633333333333334) internal successors, (229), 30 states have internal predecessors, (229), 0 states have call successors, (0), 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 16:57:28,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:57:28,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-31 16:57:28,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:57:35,295 INFO L124 PetriNetUnfolderBase]: 6485/12955 cut-off events. [2024-01-31 16:57:35,296 INFO L125 PetriNetUnfolderBase]: For 576796/576796 co-relation queries the response was YES. [2024-01-31 16:57:35,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93757 conditions, 12955 events. 6485/12955 cut-off events. For 576796/576796 co-relation queries the response was YES. Maximal size of possible extension queue 778. Compared 117316 event pairs, 2313 based on Foata normal form. 2/12921 useless extension candidates. Maximal degree in co-relation 93604. Up to 5812 conditions per place. [2024-01-31 16:57:35,490 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 564 selfloop transitions, 245 changer transitions 22/834 dead transitions. [2024-01-31 16:57:35,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 656 places, 834 transitions, 24646 flow [2024-01-31 16:57:35,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-31 16:57:35,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-31 16:57:35,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 306 transitions. [2024-01-31 16:57:35,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3497142857142857 [2024-01-31 16:57:35,492 INFO L175 Difference]: Start difference. First operand has 633 places, 717 transitions, 22272 flow. Second operand 25 states and 306 transitions. [2024-01-31 16:57:35,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 656 places, 834 transitions, 24646 flow [2024-01-31 16:57:37,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 647 places, 834 transitions, 24045 flow, removed 272 selfloop flow, removed 9 redundant places. [2024-01-31 16:57:37,879 INFO L231 Difference]: Finished difference. Result has 651 places, 718 transitions, 22371 flow [2024-01-31 16:57:37,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=21678, PETRI_DIFFERENCE_MINUEND_PLACES=623, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=22371, PETRI_PLACES=651, PETRI_TRANSITIONS=718} [2024-01-31 16:57:37,879 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 620 predicate places. [2024-01-31 16:57:37,880 INFO L495 AbstractCegarLoop]: Abstraction has has 651 places, 718 transitions, 22371 flow [2024-01-31 16:57:37,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 7.633333333333334) internal successors, (229), 30 states have internal predecessors, (229), 0 states have call successors, (0), 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 16:57:37,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:57:37,880 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 2, 2, 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 16:57:37,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2024-01-31 16:57:38,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-01-31 16:57:38,092 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 16:57:38,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:57:38,093 INFO L85 PathProgramCache]: Analyzing trace with hash -830757406, now seen corresponding path program 60 times [2024-01-31 16:57:38,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:57:38,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134366298] [2024-01-31 16:57:38,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:57:38,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:57:38,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:57:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-01-31 16:57:41,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:57:41,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134366298] [2024-01-31 16:57:41,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134366298] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:57:41,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601638158] [2024-01-31 16:57:41,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:57:41,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:57:41,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:57:41,374 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:57:41,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-01-31 16:57:42,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-01-31 16:57:42,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:57:42,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 58 conjunts are in the unsatisfiable core [2024-01-31 16:57:42,184 INFO L285 TraceCheckSpWp]: Computing forward predicates...