./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-multiply-verify.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/popl20-more-multiply-verify.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/popl20-more-multiply-verify.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-more-multiply-verify.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 17:09:59,153 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:09:59,216 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:09:59,220 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:09:59,220 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:09:59,244 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:09:59,245 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:09:59,245 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:09:59,246 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:09:59,249 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:09:59,249 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:09:59,249 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:09:59,251 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:09:59,252 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:09:59,252 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:09:59,252 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:09:59,252 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:09:59,252 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:09:59,253 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:09:59,254 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:09:59,254 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:09:59,254 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:09:59,254 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:09:59,254 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:09:59,255 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:09:59,255 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:09:59,255 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:09:59,255 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:09:59,256 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:09:59,256 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:09:59,257 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:09:59,257 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:09:59,257 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:09:59,257 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:09:59,257 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:09:59,258 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:09:59,258 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:09:59,258 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:09:59,258 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:09:59,258 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:09:59,259 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:09:59,259 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:09:59,259 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:09:59,259 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:09:59,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:09:59,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:09:59,518 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:09:59,519 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:09:59,520 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:09:59,521 INFO L431 ainManager$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/popl20-more-multiply-verify.wvr.yml/witness.yml [2024-01-31 17:09:59,650 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:09:59,650 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:09:59,651 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c [2024-01-31 17:10:00,558 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:10:00,747 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:10:00,748 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c [2024-01-31 17:10:00,756 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5321fd75/c29cd4f665ea413888c8ff78d540bc6e/FLAG2751d7281 [2024-01-31 17:10:00,771 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5321fd75/c29cd4f665ea413888c8ff78d540bc6e [2024-01-31 17:10:00,771 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:10:00,772 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:10:00,775 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:10:00,775 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:10:00,778 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:10:00,779 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:09:59" (1/2) ... [2024-01-31 17:10:00,780 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5739988c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:10:00, skipping insertion in model container [2024-01-31 17:10:00,780 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:09:59" (1/2) ... [2024-01-31 17:10:00,782 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@66b48df4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:10:00, skipping insertion in model container [2024-01-31 17:10:00,782 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:10:00" (2/2) ... [2024-01-31 17:10:00,782 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5739988c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:10:00, skipping insertion in model container [2024-01-31 17:10:00,782 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:10:00" (2/2) ... [2024-01-31 17:10:00,782 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:10:00,823 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 17:10:00,824 INFO L98 nessWitnessExtractor]: Location invariant after [L66-L66] (((((4294967295LL - (long long )i) + (long long )x >= 0LL) && ((long long )i + (long long )x >= 0LL)) && ((4294967295LL + (long long )i) - (long long )x >= 0LL)) && ((8589934590LL - (long long )i) - (long long )x >= 0LL)) && ((unsigned long )_argptr == 0UL) [2024-01-31 17:10:00,824 INFO L98 nessWitnessExtractor]: Location invariant after [L50-L50] (((((4294967295LL - (long long )i) + (long long )x >= 0LL) && ((long long )i + (long long )x >= 0LL)) && ((4294967295LL + (long long )i) - (long long )x >= 0LL)) && ((8589934590LL - (long long )i) - (long long )x >= 0LL)) && ((unsigned long )_argptr == 0UL) [2024-01-31 17:10:00,842 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:10:01,018 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/popl20-more-multiply-verify.wvr.c[3081,3094] [2024-01-31 17:10:01,030 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:10:01,039 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:10:01,052 WARN L424 MainDispatcher]: Unable to annotate unsigned int with a witness entry [2024-01-31 17:10:01,057 WARN L424 MainDispatcher]: Unable to annotate unsigned int with a witness entry [2024-01-31 17:10:01,073 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/popl20-more-multiply-verify.wvr.c[3081,3094] [2024-01-31 17:10:01,078 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:10:01,092 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:10:01,093 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:10:01 WrapperNode [2024-01-31 17:10:01,093 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:10:01,094 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:10:01,095 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:10:01,095 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:10:01,100 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:10:01" (1/1) ... [2024-01-31 17:10:01,115 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:10:01" (1/1) ... [2024-01-31 17:10:01,148 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 189 [2024-01-31 17:10:01,149 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:10:01,149 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:10:01,149 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:10:01,149 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:10:01,158 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:10:01" (1/1) ... [2024-01-31 17:10:01,158 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:10:01" (1/1) ... [2024-01-31 17:10:01,171 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:10:01" (1/1) ... [2024-01-31 17:10:01,196 INFO L175 MemorySlicer]: Split 13 memory accesses to 5 slices as follows [2, 5, 2, 2, 2]. 38 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-01-31 17:10:01,197 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:10:01" (1/1) ... [2024-01-31 17:10:01,197 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:10:01" (1/1) ... [2024-01-31 17:10:01,207 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:10:01" (1/1) ... [2024-01-31 17:10:01,211 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:10:01" (1/1) ... [2024-01-31 17:10:01,215 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:10:01" (1/1) ... [2024-01-31 17:10:01,216 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:10:01" (1/1) ... [2024-01-31 17:10:01,218 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:10:01,219 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:10:01,219 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:10:01,219 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:10:01,220 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:10:01" (1/1) ... [2024-01-31 17:10:01,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:10:01,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:10:01,246 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 17:10:01,257 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 17:10:01,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:10:01,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:10:01,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:10:01,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:10:01,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:10:01,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 17:10:01,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-31 17:10:01,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 17:10:01,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 17:10:01,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 17:10:01,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 17:10:01,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-31 17:10:01,282 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 17:10:01,283 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 17:10:01,283 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 17:10:01,285 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 17:10:01,285 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-31 17:10:01,285 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-31 17:10:01,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:10:01,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:10:01,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:10:01,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 17:10:01,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-31 17:10:01,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 17:10:01,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 17:10:01,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-31 17:10:01,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:10:01,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:10:01,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:10:01,288 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 17:10:01,436 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:10:01,439 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:10:01,670 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:10:01,670 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:10:01,864 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:10:01,864 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-31 17:10:01,864 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:10:01 BoogieIcfgContainer [2024-01-31 17:10:01,865 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:10:01,866 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:10:01,866 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:10:01,874 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:10:01,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:09:59" (1/4) ... [2024-01-31 17:10:01,874 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c7e262 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:10:01, skipping insertion in model container [2024-01-31 17:10:01,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:10:00" (2/4) ... [2024-01-31 17:10:01,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c7e262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:10:01, skipping insertion in model container [2024-01-31 17:10:01,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:10:01" (3/4) ... [2024-01-31 17:10:01,876 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c7e262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:10:01, skipping insertion in model container [2024-01-31 17:10:01,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:10:01" (4/4) ... [2024-01-31 17:10:01,877 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-multiply-verify.wvr.c [2024-01-31 17:10:01,890 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:10:01,890 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 17:10:01,890 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:10:01,943 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-31 17:10:01,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 37 transitions, 95 flow [2024-01-31 17:10:02,009 INFO L124 PetriNetUnfolderBase]: 3/34 cut-off events. [2024-01-31 17:10:02,010 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 17:10:02,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 34 events. 3/34 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 54 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-01-31 17:10:02,013 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 37 transitions, 95 flow [2024-01-31 17:10:02,017 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 33 transitions, 84 flow [2024-01-31 17:10:02,029 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:10:02,035 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;@2d75ec38, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:10:02,035 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-31 17:10:02,050 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:10:02,051 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2024-01-31 17:10:02,051 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 17:10:02,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:02,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:02,052 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:02,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:02,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1429538076, now seen corresponding path program 1 times [2024-01-31 17:10:02,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:02,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185458454] [2024-01-31 17:10:02,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:02,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:02,380 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 17:10:02,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:02,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185458454] [2024-01-31 17:10:02,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185458454] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:10:02,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:10:02,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:10:02,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230811982] [2024-01-31 17:10:02,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:10:02,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:10:02,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:02,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:10:02,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:10:02,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-01-31 17:10:02,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:02,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:02,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-01-31 17:10:02,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:02,602 INFO L124 PetriNetUnfolderBase]: 377/611 cut-off events. [2024-01-31 17:10:02,603 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2024-01-31 17:10:02,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1288 conditions, 611 events. 377/611 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2151 event pairs, 136 based on Foata normal form. 9/607 useless extension candidates. Maximal degree in co-relation 1069. Up to 477 conditions per place. [2024-01-31 17:10:02,613 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 37 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2024-01-31 17:10:02,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 196 flow [2024-01-31 17:10:02,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:10:02,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:10:02,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-01-31 17:10:02,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6126126126126126 [2024-01-31 17:10:02,625 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 84 flow. Second operand 3 states and 68 transitions. [2024-01-31 17:10:02,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 196 flow [2024-01-31 17:10:02,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 46 transitions, 180 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-31 17:10:02,633 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 91 flow [2024-01-31 17:10:02,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2024-01-31 17:10:02,639 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -3 predicate places. [2024-01-31 17:10:02,639 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 91 flow [2024-01-31 17:10:02,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:02,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:02,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:02,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 17:10:02,641 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:02,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:02,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1439560030, now seen corresponding path program 2 times [2024-01-31 17:10:02,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:02,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900000725] [2024-01-31 17:10:02,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:02,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:02,899 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 17:10:02,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:02,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900000725] [2024-01-31 17:10:02,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900000725] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:10:02,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:10:02,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 17:10:02,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154780350] [2024-01-31 17:10:02,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:10:02,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:10:02,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:02,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:10:02,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:10:02,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-01-31 17:10:02,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:02,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:02,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-01-31 17:10:02,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:03,075 INFO L124 PetriNetUnfolderBase]: 447/747 cut-off events. [2024-01-31 17:10:03,076 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2024-01-31 17:10:03,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1635 conditions, 747 events. 447/747 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2814 event pairs, 340 based on Foata normal form. 26/749 useless extension candidates. Maximal degree in co-relation 520. Up to 592 conditions per place. [2024-01-31 17:10:03,083 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 28 selfloop transitions, 2 changer transitions 13/49 dead transitions. [2024-01-31 17:10:03,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 49 transitions, 208 flow [2024-01-31 17:10:03,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:10:03,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:10:03,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2024-01-31 17:10:03,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5337837837837838 [2024-01-31 17:10:03,091 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 91 flow. Second operand 4 states and 79 transitions. [2024-01-31 17:10:03,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 49 transitions, 208 flow [2024-01-31 17:10:03,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 49 transitions, 205 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:10:03,093 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 104 flow [2024-01-31 17:10:03,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2024-01-31 17:10:03,094 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2024-01-31 17:10:03,094 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 104 flow [2024-01-31 17:10:03,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:03,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:03,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:03,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 17:10:03,096 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:03,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:03,097 INFO L85 PathProgramCache]: Analyzing trace with hash 475046753, now seen corresponding path program 1 times [2024-01-31 17:10:03,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:03,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091059461] [2024-01-31 17:10:03,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:03,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:03,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:10:03,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:03,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091059461] [2024-01-31 17:10:03,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091059461] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:10:03,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:10:03,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:10:03,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059680911] [2024-01-31 17:10:03,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:10:03,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:10:03,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:03,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:10:03,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:10:03,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-01-31 17:10:03,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:03,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:03,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-01-31 17:10:03,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:03,254 INFO L124 PetriNetUnfolderBase]: 237/412 cut-off events. [2024-01-31 17:10:03,255 INFO L125 PetriNetUnfolderBase]: For 110/124 co-relation queries the response was YES. [2024-01-31 17:10:03,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 931 conditions, 412 events. 237/412 cut-off events. For 110/124 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1354 event pairs, 60 based on Foata normal form. 34/434 useless extension candidates. Maximal degree in co-relation 917. Up to 152 conditions per place. [2024-01-31 17:10:03,257 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 43 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2024-01-31 17:10:03,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 54 transitions, 240 flow [2024-01-31 17:10:03,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:10:03,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:10:03,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2024-01-31 17:10:03,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675675675675675 [2024-01-31 17:10:03,259 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 104 flow. Second operand 4 states and 84 transitions. [2024-01-31 17:10:03,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 54 transitions, 240 flow [2024-01-31 17:10:03,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 54 transitions, 232 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-01-31 17:10:03,261 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 112 flow [2024-01-31 17:10:03,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2024-01-31 17:10:03,262 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2024-01-31 17:10:03,262 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 112 flow [2024-01-31 17:10:03,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:03,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:03,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:03,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 17:10:03,263 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:03,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:03,263 INFO L85 PathProgramCache]: Analyzing trace with hash -911811271, now seen corresponding path program 2 times [2024-01-31 17:10:03,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:03,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581617107] [2024-01-31 17:10:03,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:03,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:03,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:10:03,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:03,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581617107] [2024-01-31 17:10:03,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581617107] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:03,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454694780] [2024-01-31 17:10:03,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:10:03,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:03,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:10:03,432 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 17:10:03,458 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 17:10:03,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-31 17:10:03,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:10:03,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 17:10:03,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:10:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:10:03,765 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:10:03,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454694780] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:10:03,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 17:10:03,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2024-01-31 17:10:03,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344446961] [2024-01-31 17:10:03,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:10:03,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 17:10:03,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:03,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 17:10:03,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-01-31 17:10:03,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:10:03,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 112 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:03,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:03,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:10:03,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:04,045 INFO L124 PetriNetUnfolderBase]: 574/975 cut-off events. [2024-01-31 17:10:04,045 INFO L125 PetriNetUnfolderBase]: For 447/455 co-relation queries the response was YES. [2024-01-31 17:10:04,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2297 conditions, 975 events. 574/975 cut-off events. For 447/455 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4448 event pairs, 143 based on Foata normal form. 6/978 useless extension candidates. Maximal degree in co-relation 2278. Up to 369 conditions per place. [2024-01-31 17:10:04,049 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 65 selfloop transitions, 14 changer transitions 21/104 dead transitions. [2024-01-31 17:10:04,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 104 transitions, 495 flow [2024-01-31 17:10:04,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 17:10:04,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 17:10:04,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-01-31 17:10:04,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.527027027027027 [2024-01-31 17:10:04,054 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 112 flow. Second operand 8 states and 156 transitions. [2024-01-31 17:10:04,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 104 transitions, 495 flow [2024-01-31 17:10:04,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 104 transitions, 475 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-01-31 17:10:04,059 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 211 flow [2024-01-31 17:10:04,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=211, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-01-31 17:10:04,060 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 13 predicate places. [2024-01-31 17:10:04,060 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 211 flow [2024-01-31 17:10:04,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:04,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:04,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:04,087 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 17:10:04,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:04,276 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:04,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:04,277 INFO L85 PathProgramCache]: Analyzing trace with hash 998430467, now seen corresponding path program 3 times [2024-01-31 17:10:04,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:04,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314897845] [2024-01-31 17:10:04,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:04,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:04,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:04,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:10:04,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:04,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314897845] [2024-01-31 17:10:04,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314897845] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:04,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128955520] [2024-01-31 17:10:04,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:10:04,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:04,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:10:04,405 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 17:10:04,408 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 17:10:04,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-01-31 17:10:04,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:10:04,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-31 17:10:04,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:10:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:10:04,648 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:10:04,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128955520] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:10:04,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 17:10:04,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2024-01-31 17:10:04,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369363111] [2024-01-31 17:10:04,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:10:04,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 17:10:04,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:04,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 17:10:04,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-01-31 17:10:04,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:10:04,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 211 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:04,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:04,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:10:04,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:04,945 INFO L124 PetriNetUnfolderBase]: 770/1304 cut-off events. [2024-01-31 17:10:04,945 INFO L125 PetriNetUnfolderBase]: For 1255/1262 co-relation queries the response was YES. [2024-01-31 17:10:04,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3731 conditions, 1304 events. 770/1304 cut-off events. For 1255/1262 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6330 event pairs, 199 based on Foata normal form. 6/1308 useless extension candidates. Maximal degree in co-relation 3715. Up to 437 conditions per place. [2024-01-31 17:10:04,952 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 67 selfloop transitions, 21 changer transitions 21/113 dead transitions. [2024-01-31 17:10:04,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 113 transitions, 655 flow [2024-01-31 17:10:04,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 17:10:04,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 17:10:04,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-01-31 17:10:04,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5236486486486487 [2024-01-31 17:10:04,953 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 211 flow. Second operand 8 states and 155 transitions. [2024-01-31 17:10:04,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 113 transitions, 655 flow [2024-01-31 17:10:04,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 113 transitions, 627 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-01-31 17:10:04,958 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 359 flow [2024-01-31 17:10:04,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=359, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2024-01-31 17:10:04,959 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 20 predicate places. [2024-01-31 17:10:04,959 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 359 flow [2024-01-31 17:10:04,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:04,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:04,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:04,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 17:10:05,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:05,171 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:05,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:05,171 INFO L85 PathProgramCache]: Analyzing trace with hash 583778315, now seen corresponding path program 4 times [2024-01-31 17:10:05,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:05,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075443664] [2024-01-31 17:10:05,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:05,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:05,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:10:05,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:05,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075443664] [2024-01-31 17:10:05,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075443664] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:05,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023011478] [2024-01-31 17:10:05,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:10:05,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:05,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:10:05,268 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 17:10:05,271 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 17:10:05,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:10:05,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:10:05,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:10:05,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:10:05,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:10:05,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:10:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:10:05,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023011478] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:10:05,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:10:05,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-01-31 17:10:05,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041958837] [2024-01-31 17:10:05,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:10:05,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 17:10:05,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:05,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 17:10:05,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-01-31 17:10:05,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-01-31 17:10:05,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 359 flow. Second operand has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:05,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:05,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-01-31 17:10:05,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:05,716 INFO L124 PetriNetUnfolderBase]: 1135/1989 cut-off events. [2024-01-31 17:10:05,716 INFO L125 PetriNetUnfolderBase]: For 2941/2949 co-relation queries the response was YES. [2024-01-31 17:10:05,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6133 conditions, 1989 events. 1135/1989 cut-off events. For 2941/2949 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 11383 event pairs, 626 based on Foata normal form. 38/1988 useless extension candidates. Maximal degree in co-relation 6113. Up to 924 conditions per place. [2024-01-31 17:10:05,728 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 42 selfloop transitions, 3 changer transitions 40/100 dead transitions. [2024-01-31 17:10:05,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 100 transitions, 743 flow [2024-01-31 17:10:05,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:10:05,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:10:05,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-01-31 17:10:05,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5180180180180181 [2024-01-31 17:10:05,729 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 359 flow. Second operand 6 states and 115 transitions. [2024-01-31 17:10:05,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 100 transitions, 743 flow [2024-01-31 17:10:05,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 100 transitions, 731 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-01-31 17:10:05,739 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 391 flow [2024-01-31 17:10:05,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2024-01-31 17:10:05,740 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 24 predicate places. [2024-01-31 17:10:05,740 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 391 flow [2024-01-31 17:10:05,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:05,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:05,740 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:05,753 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 17:10:05,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:05,953 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:05,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:05,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1003628010, now seen corresponding path program 5 times [2024-01-31 17:10:05,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:05,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918044535] [2024-01-31 17:10:05,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:05,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:06,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:10:07,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:07,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918044535] [2024-01-31 17:10:07,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918044535] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:07,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181677261] [2024-01-31 17:10:07,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:10:07,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:07,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:10:07,584 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 17:10:07,586 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 17:10:07,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:10:07,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:10:07,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 17:10:07,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:10:07,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:10:08,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:10:08,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:10:08,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 74 [2024-01-31 17:10:08,821 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-01-31 17:10:08,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 145 treesize of output 129 [2024-01-31 17:10:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:10:09,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181677261] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:10:09,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:10:09,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-01-31 17:10:09,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306253728] [2024-01-31 17:10:09,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:10:09,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-31 17:10:09,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:09,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-31 17:10:09,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2024-01-31 17:10:09,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:10:09,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 391 flow. Second operand has 32 states, 32 states have (on average 9.4375) internal successors, (302), 32 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:09,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:09,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:10:09,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:12,391 INFO L124 PetriNetUnfolderBase]: 2950/5018 cut-off events. [2024-01-31 17:10:12,391 INFO L125 PetriNetUnfolderBase]: For 9804/9804 co-relation queries the response was YES. [2024-01-31 17:10:12,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16289 conditions, 5018 events. 2950/5018 cut-off events. For 9804/9804 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 31939 event pairs, 838 based on Foata normal form. 2/5013 useless extension candidates. Maximal degree in co-relation 16257. Up to 1279 conditions per place. [2024-01-31 17:10:12,420 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 262 selfloop transitions, 73 changer transitions 56/395 dead transitions. [2024-01-31 17:10:12,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 395 transitions, 2704 flow [2024-01-31 17:10:12,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-01-31 17:10:12,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-01-31 17:10:12,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 540 transitions. [2024-01-31 17:10:12,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707933740191805 [2024-01-31 17:10:12,423 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 391 flow. Second operand 31 states and 540 transitions. [2024-01-31 17:10:12,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 395 transitions, 2704 flow [2024-01-31 17:10:12,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 395 transitions, 2582 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-01-31 17:10:12,458 INFO L231 Difference]: Finished difference. Result has 100 places, 131 transitions, 1239 flow [2024-01-31 17:10:12,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1239, PETRI_PLACES=100, PETRI_TRANSITIONS=131} [2024-01-31 17:10:12,459 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 60 predicate places. [2024-01-31 17:10:12,459 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 131 transitions, 1239 flow [2024-01-31 17:10:12,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 9.4375) internal successors, (302), 32 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:12,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:12,460 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:12,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-31 17:10:12,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:12,671 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:12,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:12,671 INFO L85 PathProgramCache]: Analyzing trace with hash 2041689512, now seen corresponding path program 6 times [2024-01-31 17:10:12,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:12,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261696319] [2024-01-31 17:10:12,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:12,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:10:13,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:13,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261696319] [2024-01-31 17:10:13,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261696319] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:13,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912453582] [2024-01-31 17:10:13,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:10:13,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:13,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:10:13,307 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 17:10:13,336 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 17:10:13,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-01-31 17:10:13,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:10:13,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-31 17:10:13,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:10:13,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:10:13,531 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:10:13,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912453582] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:10:13,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 17:10:13,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 17 [2024-01-31 17:10:13,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342464928] [2024-01-31 17:10:13,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:10:13,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 17:10:13,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:13,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 17:10:13,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2024-01-31 17:10:13,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:10:13,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 131 transitions, 1239 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:13,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:13,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:10:13,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:14,047 INFO L124 PetriNetUnfolderBase]: 3018/5155 cut-off events. [2024-01-31 17:10:14,048 INFO L125 PetriNetUnfolderBase]: For 14256/14256 co-relation queries the response was YES. [2024-01-31 17:10:14,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18101 conditions, 5155 events. 3018/5155 cut-off events. For 14256/14256 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 33250 event pairs, 832 based on Foata normal form. 2/5145 useless extension candidates. Maximal degree in co-relation 18043. Up to 1843 conditions per place. [2024-01-31 17:10:14,077 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 98 selfloop transitions, 68 changer transitions 22/192 dead transitions. [2024-01-31 17:10:14,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 192 transitions, 1825 flow [2024-01-31 17:10:14,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 17:10:14,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 17:10:14,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-01-31 17:10:14,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5371621621621622 [2024-01-31 17:10:14,079 INFO L175 Difference]: Start difference. First operand has 100 places, 131 transitions, 1239 flow. Second operand 8 states and 159 transitions. [2024-01-31 17:10:14,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 192 transitions, 1825 flow [2024-01-31 17:10:14,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 192 transitions, 1711 flow, removed 53 selfloop flow, removed 10 redundant places. [2024-01-31 17:10:14,134 INFO L231 Difference]: Finished difference. Result has 94 places, 133 transitions, 1319 flow [2024-01-31 17:10:14,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1319, PETRI_PLACES=94, PETRI_TRANSITIONS=133} [2024-01-31 17:10:14,136 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 54 predicate places. [2024-01-31 17:10:14,136 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 133 transitions, 1319 flow [2024-01-31 17:10:14,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:14,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:14,136 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:14,149 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 17:10:14,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:14,352 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:14,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:14,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1737680986, now seen corresponding path program 7 times [2024-01-31 17:10:14,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:14,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289491922] [2024-01-31 17:10:14,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:14,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:10:15,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:15,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289491922] [2024-01-31 17:10:15,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289491922] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:15,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140939507] [2024-01-31 17:10:15,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:10:15,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:15,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:10:15,251 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 17:10:15,276 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 17:10:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:15,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-31 17:10:15,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:10:15,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:10:15,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:10:15,634 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:10:15,635 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 58 treesize of output 60 [2024-01-31 17:10:15,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:10:15,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140939507] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:15,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 17:10:15,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11, 8] total 23 [2024-01-31 17:10:15,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739612285] [2024-01-31 17:10:15,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:10:15,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 17:10:15,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:15,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 17:10:15,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2024-01-31 17:10:15,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:10:15,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 133 transitions, 1319 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:15,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:15,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:10:15,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:16,380 INFO L124 PetriNetUnfolderBase]: 3058/5253 cut-off events. [2024-01-31 17:10:16,381 INFO L125 PetriNetUnfolderBase]: For 18815/18845 co-relation queries the response was YES. [2024-01-31 17:10:16,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18795 conditions, 5253 events. 3058/5253 cut-off events. For 18815/18845 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 34124 event pairs, 852 based on Foata normal form. 28/5277 useless extension candidates. Maximal degree in co-relation 18747. Up to 1623 conditions per place. [2024-01-31 17:10:16,409 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 99 selfloop transitions, 61 changer transitions 22/186 dead transitions. [2024-01-31 17:10:16,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 186 transitions, 1861 flow [2024-01-31 17:10:16,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 17:10:16,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 17:10:16,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-01-31 17:10:16,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067567567567568 [2024-01-31 17:10:16,411 INFO L175 Difference]: Start difference. First operand has 94 places, 133 transitions, 1319 flow. Second operand 8 states and 150 transitions. [2024-01-31 17:10:16,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 186 transitions, 1861 flow [2024-01-31 17:10:16,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 186 transitions, 1738 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-01-31 17:10:16,480 INFO L231 Difference]: Finished difference. Result has 96 places, 135 transitions, 1382 flow [2024-01-31 17:10:16,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1382, PETRI_PLACES=96, PETRI_TRANSITIONS=135} [2024-01-31 17:10:16,481 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 56 predicate places. [2024-01-31 17:10:16,481 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 135 transitions, 1382 flow [2024-01-31 17:10:16,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:16,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:16,481 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:16,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-01-31 17:10:16,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:16,692 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:16,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:16,693 INFO L85 PathProgramCache]: Analyzing trace with hash 132130216, now seen corresponding path program 8 times [2024-01-31 17:10:16,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:16,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595249510] [2024-01-31 17:10:16,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:16,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:10:17,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:17,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595249510] [2024-01-31 17:10:17,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595249510] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:17,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955680995] [2024-01-31 17:10:17,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:10:17,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:17,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:10:17,444 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 17:10:17,480 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 17:10:17,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-31 17:10:17,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:10:17,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-31 17:10:17,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:10:17,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:10:17,697 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:10:17,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955680995] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:10:17,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 17:10:17,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 17 [2024-01-31 17:10:17,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185534494] [2024-01-31 17:10:17,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:10:17,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 17:10:17,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:17,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 17:10:17,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2024-01-31 17:10:17,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:10:17,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 135 transitions, 1382 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:17,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:17,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:10:17,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:18,171 INFO L124 PetriNetUnfolderBase]: 3070/5275 cut-off events. [2024-01-31 17:10:18,171 INFO L125 PetriNetUnfolderBase]: For 21727/21765 co-relation queries the response was YES. [2024-01-31 17:10:18,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19272 conditions, 5275 events. 3070/5275 cut-off events. For 21727/21765 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 34101 event pairs, 886 based on Foata normal form. 28/5299 useless extension candidates. Maximal degree in co-relation 19223. Up to 2151 conditions per place. [2024-01-31 17:10:18,213 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 108 selfloop transitions, 55 changer transitions 22/189 dead transitions. [2024-01-31 17:10:18,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 189 transitions, 1954 flow [2024-01-31 17:10:18,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 17:10:18,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 17:10:18,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-01-31 17:10:18,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4966216216216216 [2024-01-31 17:10:18,215 INFO L175 Difference]: Start difference. First operand has 96 places, 135 transitions, 1382 flow. Second operand 8 states and 147 transitions. [2024-01-31 17:10:18,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 189 transitions, 1954 flow [2024-01-31 17:10:18,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 189 transitions, 1855 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-01-31 17:10:18,293 INFO L231 Difference]: Finished difference. Result has 99 places, 138 transitions, 1453 flow [2024-01-31 17:10:18,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1285, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1453, PETRI_PLACES=99, PETRI_TRANSITIONS=138} [2024-01-31 17:10:18,293 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 59 predicate places. [2024-01-31 17:10:18,293 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 138 transitions, 1453 flow [2024-01-31 17:10:18,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:18,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:18,294 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:18,307 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 17:10:18,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:18,499 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:18,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:18,500 INFO L85 PathProgramCache]: Analyzing trace with hash 36581817, now seen corresponding path program 1 times [2024-01-31 17:10:18,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:18,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428682029] [2024-01-31 17:10:18,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:18,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:18,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:10:18,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:18,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428682029] [2024-01-31 17:10:18,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428682029] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:18,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413320388] [2024-01-31 17:10:18,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:18,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:18,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:10:18,577 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 17:10:18,600 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 17:10:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:18,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:10:18,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:10:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:10:18,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:10:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:10:18,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413320388] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:18,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 17:10:18,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2024-01-31 17:10:18,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233010843] [2024-01-31 17:10:18,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:10:18,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:10:18,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:18,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:10:18,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-01-31 17:10:18,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:10:18,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 138 transitions, 1453 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:18,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:18,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:10:18,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:19,203 INFO L124 PetriNetUnfolderBase]: 4189/6897 cut-off events. [2024-01-31 17:10:19,203 INFO L125 PetriNetUnfolderBase]: For 27226/27237 co-relation queries the response was YES. [2024-01-31 17:10:19,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24331 conditions, 6897 events. 4189/6897 cut-off events. For 27226/27237 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 43440 event pairs, 1022 based on Foata normal form. 5/6028 useless extension candidates. Maximal degree in co-relation 24276. Up to 3188 conditions per place. [2024-01-31 17:10:19,318 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 180 selfloop transitions, 7 changer transitions 0/219 dead transitions. [2024-01-31 17:10:19,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 219 transitions, 2733 flow [2024-01-31 17:10:19,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:10:19,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:10:19,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-01-31 17:10:19,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6283783783783784 [2024-01-31 17:10:19,320 INFO L175 Difference]: Start difference. First operand has 99 places, 138 transitions, 1453 flow. Second operand 4 states and 93 transitions. [2024-01-31 17:10:19,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 219 transitions, 2733 flow [2024-01-31 17:10:19,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 219 transitions, 2560 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-01-31 17:10:19,452 INFO L231 Difference]: Finished difference. Result has 98 places, 144 transitions, 1422 flow [2024-01-31 17:10:19,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1422, PETRI_PLACES=98, PETRI_TRANSITIONS=144} [2024-01-31 17:10:19,453 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 58 predicate places. [2024-01-31 17:10:19,453 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 144 transitions, 1422 flow [2024-01-31 17:10:19,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:19,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:19,454 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:19,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-31 17:10:19,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-01-31 17:10:19,704 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:19,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:19,705 INFO L85 PathProgramCache]: Analyzing trace with hash -652592877, now seen corresponding path program 2 times [2024-01-31 17:10:19,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:19,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812507020] [2024-01-31 17:10:19,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:19,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:10:19,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:19,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812507020] [2024-01-31 17:10:19,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812507020] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:10:19,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:10:19,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:10:19,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002317756] [2024-01-31 17:10:19,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:10:19,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:10:19,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:19,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:10:19,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:10:19,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:10:19,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 144 transitions, 1422 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:19,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:19,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:10:19,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:20,337 INFO L124 PetriNetUnfolderBase]: 4330/7313 cut-off events. [2024-01-31 17:10:20,337 INFO L125 PetriNetUnfolderBase]: For 25466/25489 co-relation queries the response was YES. [2024-01-31 17:10:20,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26981 conditions, 7313 events. 4330/7313 cut-off events. For 25466/25489 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 48877 event pairs, 2184 based on Foata normal form. 51/7290 useless extension candidates. Maximal degree in co-relation 26574. Up to 5212 conditions per place. [2024-01-31 17:10:20,371 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 138 selfloop transitions, 22 changer transitions 9/201 dead transitions. [2024-01-31 17:10:20,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 201 transitions, 2254 flow [2024-01-31 17:10:20,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:10:20,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:10:20,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2024-01-31 17:10:20,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5135135135135135 [2024-01-31 17:10:20,373 INFO L175 Difference]: Start difference. First operand has 98 places, 144 transitions, 1422 flow. Second operand 5 states and 95 transitions. [2024-01-31 17:10:20,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 201 transitions, 2254 flow [2024-01-31 17:10:20,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 201 transitions, 2254 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 17:10:20,541 INFO L231 Difference]: Finished difference. Result has 105 places, 153 transitions, 1551 flow [2024-01-31 17:10:20,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1422, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1551, PETRI_PLACES=105, PETRI_TRANSITIONS=153} [2024-01-31 17:10:20,542 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 65 predicate places. [2024-01-31 17:10:20,543 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 153 transitions, 1551 flow [2024-01-31 17:10:20,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:20,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:20,543 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:20,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-31 17:10:20,543 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:20,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:20,544 INFO L85 PathProgramCache]: Analyzing trace with hash 607257794, now seen corresponding path program 1 times [2024-01-31 17:10:20,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:20,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106243540] [2024-01-31 17:10:20,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:20,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:20,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:10:20,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:20,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106243540] [2024-01-31 17:10:20,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106243540] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:10:20,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:10:20,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:10:20,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279110552] [2024-01-31 17:10:20,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:10:20,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:10:20,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:20,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:10:20,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:10:20,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:10:20,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 153 transitions, 1551 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:20,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:20,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:10:20,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:21,187 INFO L124 PetriNetUnfolderBase]: 4455/7689 cut-off events. [2024-01-31 17:10:21,187 INFO L125 PetriNetUnfolderBase]: For 33538/33556 co-relation queries the response was YES. [2024-01-31 17:10:21,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31197 conditions, 7689 events. 4455/7689 cut-off events. For 33538/33556 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 53104 event pairs, 1948 based on Foata normal form. 138/7753 useless extension candidates. Maximal degree in co-relation 30378. Up to 4732 conditions per place. [2024-01-31 17:10:21,232 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 156 selfloop transitions, 27 changer transitions 13/226 dead transitions. [2024-01-31 17:10:21,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 226 transitions, 2725 flow [2024-01-31 17:10:21,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:10:21,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:10:21,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-01-31 17:10:21,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297297297297298 [2024-01-31 17:10:21,233 INFO L175 Difference]: Start difference. First operand has 105 places, 153 transitions, 1551 flow. Second operand 5 states and 98 transitions. [2024-01-31 17:10:21,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 226 transitions, 2725 flow [2024-01-31 17:10:21,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 226 transitions, 2713 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-01-31 17:10:21,519 INFO L231 Difference]: Finished difference. Result has 112 places, 158 transitions, 1685 flow [2024-01-31 17:10:21,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1489, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1685, PETRI_PLACES=112, PETRI_TRANSITIONS=158} [2024-01-31 17:10:21,519 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 72 predicate places. [2024-01-31 17:10:21,519 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 158 transitions, 1685 flow [2024-01-31 17:10:21,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:21,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:21,520 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:21,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-31 17:10:21,520 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:21,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:21,520 INFO L85 PathProgramCache]: Analyzing trace with hash -686077896, now seen corresponding path program 2 times [2024-01-31 17:10:21,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:21,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834516776] [2024-01-31 17:10:21,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:21,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:21,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:21,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:10:21,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:21,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834516776] [2024-01-31 17:10:21,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834516776] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:10:21,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:10:21,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:10:21,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034786451] [2024-01-31 17:10:21,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:10:21,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:10:21,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:21,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:10:21,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:10:21,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:10:21,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 158 transitions, 1685 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:21,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:21,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:10:21,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:22,439 INFO L124 PetriNetUnfolderBase]: 4654/8046 cut-off events. [2024-01-31 17:10:22,440 INFO L125 PetriNetUnfolderBase]: For 40365/40376 co-relation queries the response was YES. [2024-01-31 17:10:22,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35938 conditions, 8046 events. 4654/8046 cut-off events. For 40365/40376 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 56048 event pairs, 786 based on Foata normal form. 73/8061 useless extension candidates. Maximal degree in co-relation 34319. Up to 3679 conditions per place. [2024-01-31 17:10:22,487 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 193 selfloop transitions, 33 changer transitions 8/264 dead transitions. [2024-01-31 17:10:22,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 264 transitions, 3242 flow [2024-01-31 17:10:22,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 17:10:22,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 17:10:22,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-01-31 17:10:22,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444015444015444 [2024-01-31 17:10:22,488 INFO L175 Difference]: Start difference. First operand has 112 places, 158 transitions, 1685 flow. Second operand 7 states and 141 transitions. [2024-01-31 17:10:22,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 264 transitions, 3242 flow [2024-01-31 17:10:22,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 264 transitions, 3228 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-01-31 17:10:22,763 INFO L231 Difference]: Finished difference. Result has 118 places, 163 transitions, 1838 flow [2024-01-31 17:10:22,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1838, PETRI_PLACES=118, PETRI_TRANSITIONS=163} [2024-01-31 17:10:22,764 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 78 predicate places. [2024-01-31 17:10:22,764 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 163 transitions, 1838 flow [2024-01-31 17:10:22,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:22,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:22,764 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:22,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-01-31 17:10:22,765 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:22,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:22,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1148760254, now seen corresponding path program 3 times [2024-01-31 17:10:22,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:22,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358825856] [2024-01-31 17:10:22,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:22,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:22,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:10:22,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:22,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358825856] [2024-01-31 17:10:22,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358825856] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:10:22,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:10:22,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:10:22,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611345247] [2024-01-31 17:10:22,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:10:22,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:10:22,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:22,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:10:22,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:10:22,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:10:22,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 163 transitions, 1838 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:22,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:22,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:10:22,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:23,658 INFO L124 PetriNetUnfolderBase]: 4602/7999 cut-off events. [2024-01-31 17:10:23,658 INFO L125 PetriNetUnfolderBase]: For 49849/49969 co-relation queries the response was YES. [2024-01-31 17:10:23,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37095 conditions, 7999 events. 4602/7999 cut-off events. For 49849/49969 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 56166 event pairs, 1436 based on Foata normal form. 318/8219 useless extension candidates. Maximal degree in co-relation 36660. Up to 3450 conditions per place. [2024-01-31 17:10:23,715 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 150 selfloop transitions, 32 changer transitions 12/222 dead transitions. [2024-01-31 17:10:23,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 222 transitions, 2725 flow [2024-01-31 17:10:23,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:10:23,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:10:23,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-01-31 17:10:23,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5837837837837838 [2024-01-31 17:10:23,717 INFO L175 Difference]: Start difference. First operand has 118 places, 163 transitions, 1838 flow. Second operand 5 states and 108 transitions. [2024-01-31 17:10:23,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 222 transitions, 2725 flow [2024-01-31 17:10:23,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 222 transitions, 2649 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-01-31 17:10:23,976 INFO L231 Difference]: Finished difference. Result has 118 places, 159 transitions, 1815 flow [2024-01-31 17:10:23,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1765, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1815, PETRI_PLACES=118, PETRI_TRANSITIONS=159} [2024-01-31 17:10:23,977 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 78 predicate places. [2024-01-31 17:10:23,977 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 159 transitions, 1815 flow [2024-01-31 17:10:23,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:23,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:23,978 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:23,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-01-31 17:10:23,978 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:23,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:23,978 INFO L85 PathProgramCache]: Analyzing trace with hash 708341094, now seen corresponding path program 4 times [2024-01-31 17:10:23,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:23,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255370977] [2024-01-31 17:10:23,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:23,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:24,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:10:24,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:24,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255370977] [2024-01-31 17:10:24,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255370977] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:24,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700939509] [2024-01-31 17:10:24,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:10:24,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:24,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:10:24,063 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 17:10:24,087 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 17:10:24,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:10:24,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:10:24,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:10:24,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:10:24,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:10:24,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:10:24,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:10:24,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700939509] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:10:24,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:10:24,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-01-31 17:10:24,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660167490] [2024-01-31 17:10:24,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:10:24,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 17:10:24,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:24,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 17:10:24,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-01-31 17:10:24,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:10:24,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 159 transitions, 1815 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:24,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:24,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:10:24,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:24,833 INFO L124 PetriNetUnfolderBase]: 3936/6894 cut-off events. [2024-01-31 17:10:24,833 INFO L125 PetriNetUnfolderBase]: For 41537/41552 co-relation queries the response was YES. [2024-01-31 17:10:24,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32231 conditions, 6894 events. 3936/6894 cut-off events. For 41537/41552 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 47967 event pairs, 1304 based on Foata normal form. 107/6915 useless extension candidates. Maximal degree in co-relation 30677. Up to 3556 conditions per place. [2024-01-31 17:10:24,885 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 145 selfloop transitions, 43 changer transitions 16/230 dead transitions. [2024-01-31 17:10:24,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 230 transitions, 2861 flow [2024-01-31 17:10:24,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 17:10:24,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 17:10:24,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-01-31 17:10:24,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5019305019305019 [2024-01-31 17:10:24,886 INFO L175 Difference]: Start difference. First operand has 118 places, 159 transitions, 1815 flow. Second operand 7 states and 130 transitions. [2024-01-31 17:10:24,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 230 transitions, 2861 flow [2024-01-31 17:10:25,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 230 transitions, 2754 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-01-31 17:10:25,103 INFO L231 Difference]: Finished difference. Result has 119 places, 148 transitions, 1693 flow [2024-01-31 17:10:25,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1682, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1693, PETRI_PLACES=119, PETRI_TRANSITIONS=148} [2024-01-31 17:10:25,104 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 79 predicate places. [2024-01-31 17:10:25,104 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 148 transitions, 1693 flow [2024-01-31 17:10:25,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:25,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:25,104 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:25,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-01-31 17:10:25,307 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,SelfDestructingSolverStorable15 [2024-01-31 17:10:25,308 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:25,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:25,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1855758995, now seen corresponding path program 3 times [2024-01-31 17:10:25,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:25,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157836375] [2024-01-31 17:10:25,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:25,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:25,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:25,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:10:25,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:25,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157836375] [2024-01-31 17:10:25,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157836375] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:10:25,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:10:25,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:10:25,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450847766] [2024-01-31 17:10:25,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:10:25,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:10:25,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:25,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:10:25,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:10:25,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:10:25,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 148 transitions, 1693 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:25,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:25,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:10:25,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:25,898 INFO L124 PetriNetUnfolderBase]: 3443/6008 cut-off events. [2024-01-31 17:10:25,898 INFO L125 PetriNetUnfolderBase]: For 39550/39564 co-relation queries the response was YES. [2024-01-31 17:10:25,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29221 conditions, 6008 events. 3443/6008 cut-off events. For 39550/39564 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 39265 event pairs, 1280 based on Foata normal form. 92/6012 useless extension candidates. Maximal degree in co-relation 28637. Up to 3207 conditions per place. [2024-01-31 17:10:25,937 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 127 selfloop transitions, 11 changer transitions 26/186 dead transitions. [2024-01-31 17:10:25,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 186 transitions, 2319 flow [2024-01-31 17:10:25,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:10:25,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:10:25,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-01-31 17:10:25,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5513513513513514 [2024-01-31 17:10:25,938 INFO L175 Difference]: Start difference. First operand has 119 places, 148 transitions, 1693 flow. Second operand 5 states and 102 transitions. [2024-01-31 17:10:25,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 186 transitions, 2319 flow [2024-01-31 17:10:26,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 186 transitions, 2210 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-01-31 17:10:26,076 INFO L231 Difference]: Finished difference. Result has 115 places, 130 transitions, 1417 flow [2024-01-31 17:10:26,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1531, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1417, PETRI_PLACES=115, PETRI_TRANSITIONS=130} [2024-01-31 17:10:26,076 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 75 predicate places. [2024-01-31 17:10:26,076 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 130 transitions, 1417 flow [2024-01-31 17:10:26,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:26,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:26,077 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:26,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-01-31 17:10:26,077 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:26,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:26,077 INFO L85 PathProgramCache]: Analyzing trace with hash 709893098, now seen corresponding path program 9 times [2024-01-31 17:10:26,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:26,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628655254] [2024-01-31 17:10:26,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:26,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:10:28,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:28,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628655254] [2024-01-31 17:10:28,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628655254] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:28,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69060674] [2024-01-31 17:10:28,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:10:28,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:28,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:10:28,363 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 17:10:28,364 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 17:10:28,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-01-31 17:10:28,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:10:28,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-31 17:10:28,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:10:28,634 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-01-31 17:10:28,634 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:10:28,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69060674] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:10:28,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 17:10:28,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [15] total 21 [2024-01-31 17:10:28,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054023513] [2024-01-31 17:10:28,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:10:28,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 17:10:28,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:28,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 17:10:28,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-01-31 17:10:28,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:10:28,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 130 transitions, 1417 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:28,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:28,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:10:28,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:29,217 INFO L124 PetriNetUnfolderBase]: 3288/5806 cut-off events. [2024-01-31 17:10:29,217 INFO L125 PetriNetUnfolderBase]: For 32852/32892 co-relation queries the response was YES. [2024-01-31 17:10:29,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27303 conditions, 5806 events. 3288/5806 cut-off events. For 32852/32892 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 38730 event pairs, 1096 based on Foata normal form. 33/5801 useless extension candidates. Maximal degree in co-relation 26935. Up to 2390 conditions per place. [2024-01-31 17:10:29,257 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 84 selfloop transitions, 49 changer transitions 38/187 dead transitions. [2024-01-31 17:10:29,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 187 transitions, 2005 flow [2024-01-31 17:10:29,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 17:10:29,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 17:10:29,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-01-31 17:10:29,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067567567567568 [2024-01-31 17:10:29,258 INFO L175 Difference]: Start difference. First operand has 115 places, 130 transitions, 1417 flow. Second operand 8 states and 150 transitions. [2024-01-31 17:10:29,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 187 transitions, 2005 flow [2024-01-31 17:10:29,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 187 transitions, 1943 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-01-31 17:10:29,343 INFO L231 Difference]: Finished difference. Result has 115 places, 125 transitions, 1402 flow [2024-01-31 17:10:29,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1363, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1402, PETRI_PLACES=115, PETRI_TRANSITIONS=125} [2024-01-31 17:10:29,344 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 75 predicate places. [2024-01-31 17:10:29,344 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 125 transitions, 1402 flow [2024-01-31 17:10:29,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:29,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:29,344 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:29,356 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 17:10:29,545 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,SelfDestructingSolverStorable17 [2024-01-31 17:10:29,545 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:29,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:29,545 INFO L85 PathProgramCache]: Analyzing trace with hash -711261151, now seen corresponding path program 1 times [2024-01-31 17:10:29,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:29,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867801708] [2024-01-31 17:10:29,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:29,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:29,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:10:30,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:30,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867801708] [2024-01-31 17:10:30,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867801708] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:30,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692481315] [2024-01-31 17:10:30,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:30,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:30,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:10:30,426 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 17:10:30,427 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 17:10:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:30,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-31 17:10:30,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:10:30,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:10:30,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:10:30,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:10:31,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 70 [2024-01-31 17:10:31,879 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-01-31 17:10:31,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 167 treesize of output 138 [2024-01-31 17:10:32,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:10:32,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692481315] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:10:32,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:10:32,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-01-31 17:10:32,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422701305] [2024-01-31 17:10:32,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:10:32,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-31 17:10:32,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:32,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-31 17:10:32,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1150, Unknown=0, NotChecked=0, Total=1406 [2024-01-31 17:10:32,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:10:32,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 125 transitions, 1402 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:32,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:32,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:10:32,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:36,664 INFO L124 PetriNetUnfolderBase]: 4339/7613 cut-off events. [2024-01-31 17:10:36,664 INFO L125 PetriNetUnfolderBase]: For 40566/40658 co-relation queries the response was YES. [2024-01-31 17:10:36,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34947 conditions, 7613 events. 4339/7613 cut-off events. For 40566/40658 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 52549 event pairs, 1106 based on Foata normal form. 59/7633 useless extension candidates. Maximal degree in co-relation 34898. Up to 1420 conditions per place. [2024-01-31 17:10:36,717 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 346 selfloop transitions, 110 changer transitions 77/549 dead transitions. [2024-01-31 17:10:36,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 549 transitions, 4992 flow [2024-01-31 17:10:36,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-01-31 17:10:36,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-01-31 17:10:36,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 753 transitions. [2024-01-31 17:10:36,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44242068155111636 [2024-01-31 17:10:36,721 INFO L175 Difference]: Start difference. First operand has 115 places, 125 transitions, 1402 flow. Second operand 46 states and 753 transitions. [2024-01-31 17:10:36,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 549 transitions, 4992 flow [2024-01-31 17:10:36,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 549 transitions, 4892 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-01-31 17:10:36,810 INFO L231 Difference]: Finished difference. Result has 163 places, 191 transitions, 2340 flow [2024-01-31 17:10:36,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1339, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=2340, PETRI_PLACES=163, PETRI_TRANSITIONS=191} [2024-01-31 17:10:36,811 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 123 predicate places. [2024-01-31 17:10:36,811 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 191 transitions, 2340 flow [2024-01-31 17:10:36,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:36,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:36,812 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:36,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-31 17:10:37,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:37,012 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:37,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:37,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1630559081, now seen corresponding path program 2 times [2024-01-31 17:10:37,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:37,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301173481] [2024-01-31 17:10:37,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:37,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:37,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:39,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:10:39,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:39,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301173481] [2024-01-31 17:10:39,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301173481] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:39,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460830414] [2024-01-31 17:10:39,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:10:39,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:39,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:10:39,130 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 17:10:39,138 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 17:10:39,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:10:39,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:10:39,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-31 17:10:39,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:10:39,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:10:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:10:39,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:10:40,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 105 [2024-01-31 17:10:40,478 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-01-31 17:10:40,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 213 treesize of output 158 [2024-01-31 17:10:40,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:10:40,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460830414] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:10:40,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:10:40,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2024-01-31 17:10:40,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490466740] [2024-01-31 17:10:40,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:10:40,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-01-31 17:10:40,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:40,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-01-31 17:10:40,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2024-01-31 17:10:40,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:10:40,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 191 transitions, 2340 flow. Second operand has 35 states, 35 states have (on average 9.571428571428571) internal successors, (335), 35 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:40,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:40,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:10:40,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:50,071 INFO L124 PetriNetUnfolderBase]: 5951/10362 cut-off events. [2024-01-31 17:10:50,072 INFO L125 PetriNetUnfolderBase]: For 79332/79470 co-relation queries the response was YES. [2024-01-31 17:10:50,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52237 conditions, 10362 events. 5951/10362 cut-off events. For 79332/79470 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 74780 event pairs, 1190 based on Foata normal form. 99/10424 useless extension candidates. Maximal degree in co-relation 52167. Up to 1435 conditions per place. [2024-01-31 17:10:50,140 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 419 selfloop transitions, 165 changer transitions 44/644 dead transitions. [2024-01-31 17:10:50,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 644 transitions, 6717 flow [2024-01-31 17:10:50,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-01-31 17:10:50,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-01-31 17:10:50,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 808 transitions. [2024-01-31 17:10:50,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45495495495495497 [2024-01-31 17:10:50,143 INFO L175 Difference]: Start difference. First operand has 163 places, 191 transitions, 2340 flow. Second operand 48 states and 808 transitions. [2024-01-31 17:10:50,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 644 transitions, 6717 flow [2024-01-31 17:10:50,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 644 transitions, 6349 flow, removed 122 selfloop flow, removed 20 redundant places. [2024-01-31 17:10:50,397 INFO L231 Difference]: Finished difference. Result has 199 places, 264 transitions, 3604 flow [2024-01-31 17:10:50,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2091, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=3604, PETRI_PLACES=199, PETRI_TRANSITIONS=264} [2024-01-31 17:10:50,398 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 159 predicate places. [2024-01-31 17:10:50,398 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 264 transitions, 3604 flow [2024-01-31 17:10:50,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 9.571428571428571) internal successors, (335), 35 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:50,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:50,398 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:50,411 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 17:10:50,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:50,599 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:50,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:50,599 INFO L85 PathProgramCache]: Analyzing trace with hash -2100635233, now seen corresponding path program 3 times [2024-01-31 17:10:50,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:50,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853037227] [2024-01-31 17:10:50,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:50,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:10:51,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:51,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853037227] [2024-01-31 17:10:51,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853037227] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:51,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194297703] [2024-01-31 17:10:51,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:10:51,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:51,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:10:51,454 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 17:10:51,455 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 17:10:51,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:10:51,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:10:51,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-31 17:10:51,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:10:51,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:10:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:10:52,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:10:52,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 70 [2024-01-31 17:10:52,855 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-01-31 17:10:52,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 163 treesize of output 134 [2024-01-31 17:10:53,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:10:53,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194297703] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:10:53,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:10:53,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-01-31 17:10:53,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752084117] [2024-01-31 17:10:53,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:10:53,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-31 17:10:53,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:53,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-31 17:10:53,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2024-01-31 17:10:53,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:10:53,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 264 transitions, 3604 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:53,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:53,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:10:53,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:57,163 INFO L124 PetriNetUnfolderBase]: 6504/11413 cut-off events. [2024-01-31 17:10:57,164 INFO L125 PetriNetUnfolderBase]: For 96084/96237 co-relation queries the response was YES. [2024-01-31 17:10:57,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58782 conditions, 11413 events. 6504/11413 cut-off events. For 96084/96237 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 84585 event pairs, 1595 based on Foata normal form. 111/11481 useless extension candidates. Maximal degree in co-relation 58701. Up to 1655 conditions per place. [2024-01-31 17:10:57,255 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 383 selfloop transitions, 137 changer transitions 56/592 dead transitions. [2024-01-31 17:10:57,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 592 transitions, 6709 flow [2024-01-31 17:10:57,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-01-31 17:10:57,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-01-31 17:10:57,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 611 transitions. [2024-01-31 17:10:57,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4587087087087087 [2024-01-31 17:10:57,265 INFO L175 Difference]: Start difference. First operand has 199 places, 264 transitions, 3604 flow. Second operand 36 states and 611 transitions. [2024-01-31 17:10:57,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 592 transitions, 6709 flow [2024-01-31 17:10:57,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 592 transitions, 6135 flow, removed 239 selfloop flow, removed 20 redundant places. [2024-01-31 17:10:57,798 INFO L231 Difference]: Finished difference. Result has 223 places, 283 transitions, 3673 flow [2024-01-31 17:10:57,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3121, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=3673, PETRI_PLACES=223, PETRI_TRANSITIONS=283} [2024-01-31 17:10:57,798 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 183 predicate places. [2024-01-31 17:10:57,798 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 283 transitions, 3673 flow [2024-01-31 17:10:57,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:10:57,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:57,799 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:57,814 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 17:10:57,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-01-31 17:10:57,999 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:57,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:58,000 INFO L85 PathProgramCache]: Analyzing trace with hash -728478741, now seen corresponding path program 4 times [2024-01-31 17:10:58,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:58,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320165939] [2024-01-31 17:10:58,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:58,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:59,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:10:59,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:59,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320165939] [2024-01-31 17:10:59,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320165939] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:59,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570363148] [2024-01-31 17:10:59,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:10:59,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:59,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:10:59,745 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 17:10:59,745 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 17:10:59,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:10:59,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:10:59,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-31 17:10:59,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:10:59,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-31 17:11:00,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:11:00,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:11:01,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 70 [2024-01-31 17:11:01,053 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-01-31 17:11:01,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 167 treesize of output 138 [2024-01-31 17:11:01,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:11:01,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570363148] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:11:01,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:11:01,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-01-31 17:11:01,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827791602] [2024-01-31 17:11:01,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:11:01,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-31 17:11:01,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:11:01,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-31 17:11:01,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2024-01-31 17:11:01,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:11:01,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 283 transitions, 3673 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:11:01,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:11:01,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:11:01,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:11:11,987 INFO L124 PetriNetUnfolderBase]: 6818/12027 cut-off events. [2024-01-31 17:11:11,987 INFO L125 PetriNetUnfolderBase]: For 81398/81531 co-relation queries the response was YES. [2024-01-31 17:11:12,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58428 conditions, 12027 events. 6818/12027 cut-off events. For 81398/81531 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 90154 event pairs, 1471 based on Foata normal form. 92/12080 useless extension candidates. Maximal degree in co-relation 58334. Up to 1663 conditions per place. [2024-01-31 17:11:12,087 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 442 selfloop transitions, 173 changer transitions 77/708 dead transitions. [2024-01-31 17:11:12,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 708 transitions, 7299 flow [2024-01-31 17:11:12,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-01-31 17:11:12,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2024-01-31 17:11:12,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 876 transitions. [2024-01-31 17:11:12,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4467108618052014 [2024-01-31 17:11:12,093 INFO L175 Difference]: Start difference. First operand has 223 places, 283 transitions, 3673 flow. Second operand 53 states and 876 transitions. [2024-01-31 17:11:12,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 708 transitions, 7299 flow [2024-01-31 17:11:12,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 708 transitions, 7062 flow, removed 30 selfloop flow, removed 23 redundant places. [2024-01-31 17:11:12,460 INFO L231 Difference]: Finished difference. Result has 258 places, 293 transitions, 3981 flow [2024-01-31 17:11:12,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3487, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=3981, PETRI_PLACES=258, PETRI_TRANSITIONS=293} [2024-01-31 17:11:12,460 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 218 predicate places. [2024-01-31 17:11:12,460 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 293 transitions, 3981 flow [2024-01-31 17:11:12,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:11:12,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:11:12,461 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:11:12,474 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 17:11:12,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:11:12,662 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:11:12,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:11:12,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1579718803, now seen corresponding path program 5 times [2024-01-31 17:11:12,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:11:12,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999082348] [2024-01-31 17:11:12,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:11:12,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:11:12,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:11:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:11:13,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:11:13,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999082348] [2024-01-31 17:11:13,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999082348] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:11:13,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529381146] [2024-01-31 17:11:13,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:11:13,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:11:13,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:11:13,601 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 17:11:13,601 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 17:11:13,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:11:13,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:11:13,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-31 17:11:13,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:11:13,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:11:14,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:11:14,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:11:15,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 70 [2024-01-31 17:11:15,042 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-01-31 17:11:15,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 167 treesize of output 138 [2024-01-31 17:11:15,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:11:15,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529381146] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:11:15,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:11:15,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-01-31 17:11:15,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038832965] [2024-01-31 17:11:15,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:11:15,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-31 17:11:15,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:11:15,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-31 17:11:15,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1190, Unknown=0, NotChecked=0, Total=1406 [2024-01-31 17:11:15,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:11:15,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 293 transitions, 3981 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:11:15,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:11:15,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:11:15,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:11:20,049 INFO L124 PetriNetUnfolderBase]: 6941/12267 cut-off events. [2024-01-31 17:11:20,049 INFO L125 PetriNetUnfolderBase]: For 87723/87873 co-relation queries the response was YES. [2024-01-31 17:11:20,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61045 conditions, 12267 events. 6941/12267 cut-off events. For 87723/87873 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 92744 event pairs, 1323 based on Foata normal form. 110/12332 useless extension candidates. Maximal degree in co-relation 60939. Up to 1719 conditions per place. [2024-01-31 17:11:20,151 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 379 selfloop transitions, 167 changer transitions 56/618 dead transitions. [2024-01-31 17:11:20,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 618 transitions, 6980 flow [2024-01-31 17:11:20,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-01-31 17:11:20,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-01-31 17:11:20,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 655 transitions. [2024-01-31 17:11:20,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4539154539154539 [2024-01-31 17:11:20,152 INFO L175 Difference]: Start difference. First operand has 258 places, 293 transitions, 3981 flow. Second operand 39 states and 655 transitions. [2024-01-31 17:11:20,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 618 transitions, 6980 flow [2024-01-31 17:11:20,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 618 transitions, 6618 flow, removed 49 selfloop flow, removed 39 redundant places. [2024-01-31 17:11:20,577 INFO L231 Difference]: Finished difference. Result has 258 places, 302 transitions, 4169 flow [2024-01-31 17:11:20,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3674, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4169, PETRI_PLACES=258, PETRI_TRANSITIONS=302} [2024-01-31 17:11:20,578 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 218 predicate places. [2024-01-31 17:11:20,578 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 302 transitions, 4169 flow [2024-01-31 17:11:20,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:11:20,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:11:20,578 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:11:20,589 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 17:11:20,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:11:20,779 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:11:20,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:11:20,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1500976225, now seen corresponding path program 6 times [2024-01-31 17:11:20,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:11:20,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395990111] [2024-01-31 17:11:20,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:11:20,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:11:20,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:11:22,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:11:22,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:11:22,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395990111] [2024-01-31 17:11:22,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395990111] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:11:22,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571143725] [2024-01-31 17:11:22,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:11:22,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:11:22,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:11:22,914 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 17:11:22,915 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 17:11:23,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 17:11:23,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:11:23,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 36 conjunts are in the unsatisfiable core [2024-01-31 17:11:23,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:11:23,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-31 17:11:23,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:11:23,526 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:11:24,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 72 [2024-01-31 17:11:24,315 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-01-31 17:11:24,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 169 treesize of output 140 [2024-01-31 17:11:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:11:24,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571143725] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:11:24,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:11:24,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2024-01-31 17:11:24,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696116624] [2024-01-31 17:11:24,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:11:24,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-01-31 17:11:24,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:11:24,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-01-31 17:11:24,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2024-01-31 17:11:25,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:11:25,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 302 transitions, 4169 flow. Second operand has 36 states, 36 states have (on average 9.5) internal successors, (342), 36 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:11:25,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:11:25,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:11:25,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:11:32,613 INFO L124 PetriNetUnfolderBase]: 7218/12774 cut-off events. [2024-01-31 17:11:32,613 INFO L125 PetriNetUnfolderBase]: For 93944/94072 co-relation queries the response was YES. [2024-01-31 17:11:32,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63599 conditions, 12774 events. 7218/12774 cut-off events. For 93944/94072 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 97001 event pairs, 2124 based on Foata normal form. 89/12807 useless extension candidates. Maximal degree in co-relation 63499. Up to 1838 conditions per place. [2024-01-31 17:11:32,719 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 399 selfloop transitions, 158 changer transitions 63/636 dead transitions. [2024-01-31 17:11:32,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 636 transitions, 7272 flow [2024-01-31 17:11:32,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-01-31 17:11:32,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-01-31 17:11:32,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 712 transitions. [2024-01-31 17:11:32,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43734643734643736 [2024-01-31 17:11:32,722 INFO L175 Difference]: Start difference. First operand has 258 places, 302 transitions, 4169 flow. Second operand 44 states and 712 transitions. [2024-01-31 17:11:32,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 636 transitions, 7272 flow [2024-01-31 17:11:33,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 636 transitions, 7031 flow, removed 24 selfloop flow, removed 25 redundant places. [2024-01-31 17:11:33,146 INFO L231 Difference]: Finished difference. Result has 279 places, 312 transitions, 4421 flow [2024-01-31 17:11:33,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3962, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=4421, PETRI_PLACES=279, PETRI_TRANSITIONS=312} [2024-01-31 17:11:33,146 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 239 predicate places. [2024-01-31 17:11:33,146 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 312 transitions, 4421 flow [2024-01-31 17:11:33,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 9.5) internal successors, (342), 36 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:11:33,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:11:33,147 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:11:33,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-01-31 17:11:33,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-01-31 17:11:33,347 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:11:33,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:11:33,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1553755225, now seen corresponding path program 7 times [2024-01-31 17:11:33,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:11:33,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374705437] [2024-01-31 17:11:33,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:11:33,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:11:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:11:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:11:34,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:11:34,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374705437] [2024-01-31 17:11:34,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374705437] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:11:34,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26866183] [2024-01-31 17:11:34,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:11:34,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:11:34,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:11:34,627 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 17:11:34,628 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 17:11:34,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:11:34,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-31 17:11:34,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:11:34,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-31 17:11:35,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:11:35,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:11:36,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2024-01-31 17:11:36,933 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-01-31 17:11:36,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 174 treesize of output 160 [2024-01-31 17:11:38,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:11:38,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26866183] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:11:38,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:11:38,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-01-31 17:11:38,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202382624] [2024-01-31 17:11:38,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:11:38,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-31 17:11:38,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:11:38,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-31 17:11:38,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1199, Unknown=0, NotChecked=0, Total=1406 [2024-01-31 17:11:42,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-31 17:11:42,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:11:42,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 312 transitions, 4421 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:11:42,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:11:42,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:11:42,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:11:54,369 INFO L124 PetriNetUnfolderBase]: 7497/13236 cut-off events. [2024-01-31 17:11:54,369 INFO L125 PetriNetUnfolderBase]: For 102302/102450 co-relation queries the response was YES. [2024-01-31 17:11:54,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67146 conditions, 13236 events. 7497/13236 cut-off events. For 102302/102450 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 101266 event pairs, 2966 based on Foata normal form. 113/13265 useless extension candidates. Maximal degree in co-relation 67042. Up to 5892 conditions per place. [2024-01-31 17:11:54,488 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 362 selfloop transitions, 96 changer transitions 50/524 dead transitions. [2024-01-31 17:11:54,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 524 transitions, 6533 flow [2024-01-31 17:11:54,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 17:11:54,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 17:11:54,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 446 transitions. [2024-01-31 17:11:54,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44644644644644643 [2024-01-31 17:11:54,490 INFO L175 Difference]: Start difference. First operand has 279 places, 312 transitions, 4421 flow. Second operand 27 states and 446 transitions. [2024-01-31 17:11:54,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 524 transitions, 6533 flow [2024-01-31 17:11:55,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 524 transitions, 6242 flow, removed 45 selfloop flow, removed 31 redundant places. [2024-01-31 17:11:55,233 INFO L231 Difference]: Finished difference. Result has 276 places, 325 transitions, 4586 flow [2024-01-31 17:11:55,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=4170, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4586, PETRI_PLACES=276, PETRI_TRANSITIONS=325} [2024-01-31 17:11:55,234 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 236 predicate places. [2024-01-31 17:11:55,234 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 325 transitions, 4586 flow [2024-01-31 17:11:55,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:11:55,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:11:55,234 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:11:55,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-01-31 17:11:55,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:11:55,435 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:11:55,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:11:55,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1169313937, now seen corresponding path program 8 times [2024-01-31 17:11:55,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:11:55,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866507376] [2024-01-31 17:11:55,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:11:55,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:11:55,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:11:56,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:11:56,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:11:56,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866507376] [2024-01-31 17:11:56,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866507376] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:11:56,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229550702] [2024-01-31 17:11:56,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:11:56,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:11:56,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:11:56,750 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 17:11:56,750 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 17:11:56,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:11:56,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:11:56,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 17:11:56,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:11:57,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-31 17:11:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:11:57,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:11:58,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 70 [2024-01-31 17:11:58,792 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-01-31 17:11:58,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 163 treesize of output 134 [2024-01-31 17:11:59,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:11:59,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229550702] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:11:59,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:11:59,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-01-31 17:11:59,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345455318] [2024-01-31 17:11:59,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:11:59,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-31 17:11:59,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:11:59,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-31 17:11:59,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2024-01-31 17:11:59,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:11:59,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 325 transitions, 4586 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:11:59,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:11:59,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:11:59,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:12:06,537 INFO L124 PetriNetUnfolderBase]: 7625/13489 cut-off events. [2024-01-31 17:12:06,538 INFO L125 PetriNetUnfolderBase]: For 101162/101310 co-relation queries the response was YES. [2024-01-31 17:12:06,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68050 conditions, 13489 events. 7625/13489 cut-off events. For 101162/101310 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 103720 event pairs, 2343 based on Foata normal form. 103/13526 useless extension candidates. Maximal degree in co-relation 67949. Up to 2122 conditions per place. [2024-01-31 17:12:06,861 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 394 selfloop transitions, 154 changer transitions 85/649 dead transitions. [2024-01-31 17:12:06,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 649 transitions, 7506 flow [2024-01-31 17:12:06,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-01-31 17:12:06,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-01-31 17:12:06,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 701 transitions. [2024-01-31 17:12:06,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305896805896806 [2024-01-31 17:12:06,863 INFO L175 Difference]: Start difference. First operand has 276 places, 325 transitions, 4586 flow. Second operand 44 states and 701 transitions. [2024-01-31 17:12:06,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 649 transitions, 7506 flow [2024-01-31 17:12:07,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 649 transitions, 7361 flow, removed 21 selfloop flow, removed 18 redundant places. [2024-01-31 17:12:07,529 INFO L231 Difference]: Finished difference. Result has 306 places, 329 transitions, 4855 flow [2024-01-31 17:12:07,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=4469, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=4855, PETRI_PLACES=306, PETRI_TRANSITIONS=329} [2024-01-31 17:12:07,529 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 266 predicate places. [2024-01-31 17:12:07,530 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 329 transitions, 4855 flow [2024-01-31 17:12:07,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:12:07,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:12:07,530 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:12:07,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-01-31 17:12:07,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:12:07,730 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:12:07,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:12:07,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1972790143, now seen corresponding path program 9 times [2024-01-31 17:12:07,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:12:07,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136194772] [2024-01-31 17:12:07,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:12:07,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:12:07,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:12:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:12:10,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:12:10,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136194772] [2024-01-31 17:12:10,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136194772] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:12:10,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609222062] [2024-01-31 17:12:10,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:12:10,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:12:10,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:12:10,081 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 17:12:10,084 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 17:12:10,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:12:10,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:12:10,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-31 17:12:10,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:12:10,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-31 17:12:10,973 INFO L349 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2024-01-31 17:12:10,973 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 68 treesize of output 38 [2024-01-31 17:12:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:12:11,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:12:13,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2024-01-31 17:12:13,689 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-01-31 17:12:13,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 178 treesize of output 164 [2024-01-31 17:12:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:12:15,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609222062] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:12:15,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:12:15,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-01-31 17:12:15,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204997627] [2024-01-31 17:12:15,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:12:15,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-31 17:12:15,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:12:15,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-31 17:12:15,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1182, Unknown=0, NotChecked=0, Total=1406 [2024-01-31 17:12:15,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:12:15,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 329 transitions, 4855 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:12:15,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:12:15,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:12:15,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:12:24,035 INFO L124 PetriNetUnfolderBase]: 8540/15071 cut-off events. [2024-01-31 17:12:24,036 INFO L125 PetriNetUnfolderBase]: For 121750/121921 co-relation queries the response was YES. [2024-01-31 17:12:24,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78159 conditions, 15071 events. 8540/15071 cut-off events. For 121750/121921 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 117487 event pairs, 3362 based on Foata normal form. 130/15121 useless extension candidates. Maximal degree in co-relation 78048. Up to 5959 conditions per place. [2024-01-31 17:12:24,202 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 373 selfloop transitions, 113 changer transitions 60/562 dead transitions. [2024-01-31 17:12:24,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 562 transitions, 7477 flow [2024-01-31 17:12:24,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-31 17:12:24,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-31 17:12:24,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 434 transitions. [2024-01-31 17:12:24,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45114345114345117 [2024-01-31 17:12:24,204 INFO L175 Difference]: Start difference. First operand has 306 places, 329 transitions, 4855 flow. Second operand 26 states and 434 transitions. [2024-01-31 17:12:24,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 562 transitions, 7477 flow [2024-01-31 17:12:24,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 562 transitions, 7140 flow, removed 24 selfloop flow, removed 36 redundant places. [2024-01-31 17:12:24,812 INFO L231 Difference]: Finished difference. Result has 302 places, 365 transitions, 5520 flow [2024-01-31 17:12:24,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=4579, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5520, PETRI_PLACES=302, PETRI_TRANSITIONS=365} [2024-01-31 17:12:24,812 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 262 predicate places. [2024-01-31 17:12:24,812 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 365 transitions, 5520 flow [2024-01-31 17:12:24,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:12:24,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:12:24,813 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:12:24,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-01-31 17:12:25,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:12:25,013 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:12:25,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:12:25,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1920731163, now seen corresponding path program 10 times [2024-01-31 17:12:25,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:12:25,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635217549] [2024-01-31 17:12:25,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:12:25,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:12:25,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:12:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:12:26,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:12:26,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635217549] [2024-01-31 17:12:26,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635217549] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:12:26,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704841624] [2024-01-31 17:12:26,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:12:26,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:12:26,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:12:26,262 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 17:12:26,262 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 17:12:26,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:12:26,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:12:26,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-31 17:12:26,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:12:26,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:12:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:12:27,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:12:28,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 70 [2024-01-31 17:12:28,256 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-01-31 17:12:28,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 171 treesize of output 142 [2024-01-31 17:12:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:12:28,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704841624] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:12:28,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:12:28,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-01-31 17:12:28,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061679702] [2024-01-31 17:12:28,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:12:28,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-31 17:12:28,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:12:28,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-31 17:12:28,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1204, Unknown=0, NotChecked=0, Total=1406 [2024-01-31 17:12:28,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:12:28,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 365 transitions, 5520 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:12:28,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:12:28,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:12:28,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:12:39,183 INFO L124 PetriNetUnfolderBase]: 10520/18553 cut-off events. [2024-01-31 17:12:39,183 INFO L125 PetriNetUnfolderBase]: For 151921/152128 co-relation queries the response was YES. [2024-01-31 17:12:39,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98630 conditions, 18553 events. 10520/18553 cut-off events. For 151921/152128 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 148721 event pairs, 2032 based on Foata normal form. 127/18563 useless extension candidates. Maximal degree in co-relation 98497. Up to 2530 conditions per place. [2024-01-31 17:12:39,366 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 499 selfloop transitions, 275 changer transitions 77/867 dead transitions. [2024-01-31 17:12:39,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 867 transitions, 10874 flow [2024-01-31 17:12:39,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-01-31 17:12:39,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2024-01-31 17:12:39,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 879 transitions. [2024-01-31 17:12:39,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482406935237124 [2024-01-31 17:12:39,373 INFO L175 Difference]: Start difference. First operand has 302 places, 365 transitions, 5520 flow. Second operand 53 states and 879 transitions. [2024-01-31 17:12:39,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 867 transitions, 10874 flow [2024-01-31 17:12:40,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 867 transitions, 10719 flow, removed 73 selfloop flow, removed 10 redundant places. [2024-01-31 17:12:40,471 INFO L231 Difference]: Finished difference. Result has 361 places, 447 transitions, 7736 flow [2024-01-31 17:12:40,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=5427, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=7736, PETRI_PLACES=361, PETRI_TRANSITIONS=447} [2024-01-31 17:12:40,472 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 321 predicate places. [2024-01-31 17:12:40,472 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 447 transitions, 7736 flow [2024-01-31 17:12:40,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:12:40,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:12:40,473 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:12:40,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-01-31 17:12:40,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-01-31 17:12:40,677 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:12:40,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:12:40,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1535260315, now seen corresponding path program 11 times [2024-01-31 17:12:40,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:12:40,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383851327] [2024-01-31 17:12:40,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:12:40,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:12:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:12:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:12:43,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:12:43,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383851327] [2024-01-31 17:12:43,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383851327] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:12:43,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157874981] [2024-01-31 17:12:43,240 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:12:43,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:12:43,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:12:43,241 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 17:12:43,241 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 17:12:43,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:12:43,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:12:43,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-31 17:12:43,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:12:43,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:12:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:12:43,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:12:45,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 72 [2024-01-31 17:12:45,365 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-01-31 17:12:45,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 177 treesize of output 148 [2024-01-31 17:12:45,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:12:45,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157874981] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:12:45,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:12:45,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-01-31 17:12:45,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886048639] [2024-01-31 17:12:45,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:12:45,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-31 17:12:45,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:12:45,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-31 17:12:45,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2024-01-31 17:12:45,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:12:45,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 447 transitions, 7736 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:12:45,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:12:45,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:12:45,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:12:57,676 INFO L124 PetriNetUnfolderBase]: 11059/19369 cut-off events. [2024-01-31 17:12:57,676 INFO L125 PetriNetUnfolderBase]: For 192936/193194 co-relation queries the response was YES. [2024-01-31 17:12:57,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108615 conditions, 19369 events. 11059/19369 cut-off events. For 192936/193194 co-relation queries the response was YES. Maximal size of possible extension queue 913. Compared 154937 event pairs, 3457 based on Foata normal form. 184/19431 useless extension candidates. Maximal degree in co-relation 108456. Up to 2858 conditions per place. [2024-01-31 17:12:57,953 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 439 selfloop transitions, 257 changer transitions 84/796 dead transitions. [2024-01-31 17:12:57,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 796 transitions, 11477 flow [2024-01-31 17:12:57,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-01-31 17:12:57,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-01-31 17:12:57,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 703 transitions. [2024-01-31 17:12:57,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-01-31 17:12:57,955 INFO L175 Difference]: Start difference. First operand has 361 places, 447 transitions, 7736 flow. Second operand 44 states and 703 transitions. [2024-01-31 17:12:57,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 796 transitions, 11477 flow [2024-01-31 17:12:59,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 796 transitions, 11077 flow, removed 122 selfloop flow, removed 19 redundant places. [2024-01-31 17:12:59,277 INFO L231 Difference]: Finished difference. Result has 393 places, 480 transitions, 8590 flow [2024-01-31 17:12:59,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=7391, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=8590, PETRI_PLACES=393, PETRI_TRANSITIONS=480} [2024-01-31 17:12:59,278 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 353 predicate places. [2024-01-31 17:12:59,278 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 480 transitions, 8590 flow [2024-01-31 17:12:59,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:12:59,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:12:59,278 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:12:59,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-01-31 17:12:59,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-01-31 17:12:59,480 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:12:59,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:12:59,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1264283361, now seen corresponding path program 12 times [2024-01-31 17:12:59,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:12:59,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869690100] [2024-01-31 17:12:59,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:12:59,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:12:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:13:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:13:02,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:13:02,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869690100] [2024-01-31 17:13:02,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869690100] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:13:02,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241446733] [2024-01-31 17:13:02,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:13:02,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:13:02,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:13:02,058 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 17:13:02,058 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 17:13:02,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 17:13:02,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:13:02,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-31 17:13:02,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:13:02,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:13:02,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:13:02,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:13:04,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 70 [2024-01-31 17:13:04,060 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-01-31 17:13:04,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 163 treesize of output 134 [2024-01-31 17:13:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:13:04,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241446733] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:13:04,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:13:04,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2024-01-31 17:13:04,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745468795] [2024-01-31 17:13:04,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:13:04,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-01-31 17:13:04,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:13:04,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-01-31 17:13:04,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2024-01-31 17:13:04,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:13:04,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 480 transitions, 8590 flow. Second operand has 36 states, 36 states have (on average 9.5) internal successors, (342), 36 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:13:04,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:13:04,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:13:04,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:13:16,556 INFO L124 PetriNetUnfolderBase]: 11311/19833 cut-off events. [2024-01-31 17:13:16,556 INFO L125 PetriNetUnfolderBase]: For 210807/211060 co-relation queries the response was YES. [2024-01-31 17:13:16,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111979 conditions, 19833 events. 11311/19833 cut-off events. For 210807/211060 co-relation queries the response was YES. Maximal size of possible extension queue 946. Compared 159717 event pairs, 3262 based on Foata normal form. 182/19896 useless extension candidates. Maximal degree in co-relation 111814. Up to 2735 conditions per place. [2024-01-31 17:13:16,806 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 464 selfloop transitions, 260 changer transitions 54/794 dead transitions. [2024-01-31 17:13:16,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 794 transitions, 11916 flow [2024-01-31 17:13:16,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-01-31 17:13:16,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-01-31 17:13:16,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 678 transitions. [2024-01-31 17:13:16,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44693473961766644 [2024-01-31 17:13:16,808 INFO L175 Difference]: Start difference. First operand has 393 places, 480 transitions, 8590 flow. Second operand 41 states and 678 transitions. [2024-01-31 17:13:16,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 794 transitions, 11916 flow [2024-01-31 17:13:18,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 794 transitions, 11585 flow, removed 93 selfloop flow, removed 24 redundant places. [2024-01-31 17:13:18,226 INFO L231 Difference]: Finished difference. Result has 407 places, 488 transitions, 8995 flow [2024-01-31 17:13:18,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=8289, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=8995, PETRI_PLACES=407, PETRI_TRANSITIONS=488} [2024-01-31 17:13:18,227 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 367 predicate places. [2024-01-31 17:13:18,227 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 488 transitions, 8995 flow [2024-01-31 17:13:18,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 9.5) internal successors, (342), 36 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:13:18,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:13:18,228 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:13:18,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-01-31 17:13:18,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:13:18,428 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:13:18,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:13:18,429 INFO L85 PathProgramCache]: Analyzing trace with hash 590746679, now seen corresponding path program 13 times [2024-01-31 17:13:18,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:13:18,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133947912] [2024-01-31 17:13:18,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:13:18,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:13:18,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:13:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:13:19,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:13:19,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133947912] [2024-01-31 17:13:19,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133947912] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:13:19,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021723318] [2024-01-31 17:13:19,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:13:19,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:13:19,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:13:19,358 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 17:13:19,362 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 17:13:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:13:19,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-31 17:13:19,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:13:19,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:13:19,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:13:20,085 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:13:20,085 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 60 treesize of output 62 [2024-01-31 17:13:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:13:20,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021723318] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:13:20,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:13:20,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2024-01-31 17:13:20,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882161743] [2024-01-31 17:13:20,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:13:20,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 17:13:20,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:13:20,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 17:13:20,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2024-01-31 17:13:20,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:13:20,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 488 transitions, 8995 flow. Second operand has 28 states, 28 states have (on average 9.75) internal successors, (273), 28 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:13:20,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:13:20,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:13:20,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:13:27,634 INFO L124 PetriNetUnfolderBase]: 12922/22449 cut-off events. [2024-01-31 17:13:27,635 INFO L125 PetriNetUnfolderBase]: For 257193/257490 co-relation queries the response was YES. [2024-01-31 17:13:27,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128112 conditions, 22449 events. 12922/22449 cut-off events. For 257193/257490 co-relation queries the response was YES. Maximal size of possible extension queue 989. Compared 179821 event pairs, 3586 based on Foata normal form. 218/22527 useless extension candidates. Maximal degree in co-relation 127963. Up to 3608 conditions per place. [2024-01-31 17:13:28,013 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 449 selfloop transitions, 291 changer transitions 83/839 dead transitions. [2024-01-31 17:13:28,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 839 transitions, 13154 flow [2024-01-31 17:13:28,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-01-31 17:13:28,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-01-31 17:13:28,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 609 transitions. [2024-01-31 17:13:28,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44485025566106645 [2024-01-31 17:13:28,014 INFO L175 Difference]: Start difference. First operand has 407 places, 488 transitions, 8995 flow. Second operand 37 states and 609 transitions. [2024-01-31 17:13:28,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 839 transitions, 13154 flow [2024-01-31 17:13:29,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 839 transitions, 12836 flow, removed 27 selfloop flow, removed 27 redundant places. [2024-01-31 17:13:29,767 INFO L231 Difference]: Finished difference. Result has 428 places, 547 transitions, 10600 flow [2024-01-31 17:13:29,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=8728, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=10600, PETRI_PLACES=428, PETRI_TRANSITIONS=547} [2024-01-31 17:13:29,767 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 388 predicate places. [2024-01-31 17:13:29,767 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 547 transitions, 10600 flow [2024-01-31 17:13:29,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 9.75) internal successors, (273), 28 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:13:29,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:13:29,768 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:13:29,779 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 17:13:29,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:13:29,968 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:13:29,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:13:29,969 INFO L85 PathProgramCache]: Analyzing trace with hash 439014131, now seen corresponding path program 14 times [2024-01-31 17:13:29,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:13:29,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707577491] [2024-01-31 17:13:29,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:13:29,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:13:29,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:13:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:13:32,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:13:32,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707577491] [2024-01-31 17:13:32,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707577491] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:13:32,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152917902] [2024-01-31 17:13:32,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:13:32,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:13:32,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:13:32,193 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 17:13:32,194 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 17:13:32,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:13:32,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:13:32,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-31 17:13:32,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:13:32,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:13:32,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:13:32,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:13:34,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 70 [2024-01-31 17:13:34,367 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-01-31 17:13:34,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 171 treesize of output 142 [2024-01-31 17:13:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:13:34,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152917902] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:13:34,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:13:34,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-01-31 17:13:34,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689319513] [2024-01-31 17:13:34,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:13:34,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-31 17:13:34,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:13:34,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-31 17:13:34,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2024-01-31 17:13:34,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:13:34,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 547 transitions, 10600 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:13:34,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:13:34,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:13:34,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:13:53,427 INFO L124 PetriNetUnfolderBase]: 12905/22570 cut-off events. [2024-01-31 17:13:53,427 INFO L125 PetriNetUnfolderBase]: For 286637/286959 co-relation queries the response was YES. [2024-01-31 17:13:53,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132502 conditions, 22570 events. 12905/22570 cut-off events. For 286637/286959 co-relation queries the response was YES. Maximal size of possible extension queue 1014. Compared 183438 event pairs, 2838 based on Foata normal form. 202/22611 useless extension candidates. Maximal degree in co-relation 132339. Up to 3320 conditions per place. [2024-01-31 17:13:53,786 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 522 selfloop transitions, 347 changer transitions 85/970 dead transitions. [2024-01-31 17:13:53,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 970 transitions, 14838 flow [2024-01-31 17:13:53,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-01-31 17:13:53,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2024-01-31 17:13:53,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 896 transitions. [2024-01-31 17:13:53,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43243243243243246 [2024-01-31 17:13:53,795 INFO L175 Difference]: Start difference. First operand has 428 places, 547 transitions, 10600 flow. Second operand 56 states and 896 transitions. [2024-01-31 17:13:53,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 970 transitions, 14838 flow [2024-01-31 17:13:55,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 970 transitions, 14171 flow, removed 105 selfloop flow, removed 18 redundant places. [2024-01-31 17:13:55,993 INFO L231 Difference]: Finished difference. Result has 467 places, 557 transitions, 10842 flow [2024-01-31 17:13:55,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=9980, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=10842, PETRI_PLACES=467, PETRI_TRANSITIONS=557} [2024-01-31 17:13:55,994 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 427 predicate places. [2024-01-31 17:13:55,994 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 557 transitions, 10842 flow [2024-01-31 17:13:55,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:13:55,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:13:55,994 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:13:56,006 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 17:13:56,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:13:56,197 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:13:56,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:13:56,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1884553435, now seen corresponding path program 15 times [2024-01-31 17:13:56,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:13:56,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398349239] [2024-01-31 17:13:56,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:13:56,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:13:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:13:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:13:57,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:13:57,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398349239] [2024-01-31 17:13:57,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398349239] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:13:57,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509105487] [2024-01-31 17:13:57,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:13:57,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:13:57,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:13:57,665 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 17:13:57,666 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 17:13:58,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:13:58,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:13:58,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-31 17:13:58,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:13:58,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-31 17:13:58,688 INFO L349 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2024-01-31 17:13:58,688 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 68 treesize of output 38 [2024-01-31 17:13:58,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:13:58,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:14:04,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 69 [2024-01-31 17:14:04,171 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-01-31 17:14:04,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 161 treesize of output 147 [2024-01-31 17:14:05,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:14:05,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509105487] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:14:05,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:14:05,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-01-31 17:14:05,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804930711] [2024-01-31 17:14:05,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:14:05,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-31 17:14:05,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:14:05,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-31 17:14:05,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1222, Unknown=1, NotChecked=0, Total=1406 [2024-01-31 17:14:05,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:14:05,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 557 transitions, 10842 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:14:05,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:14:05,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:14:05,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:14:23,226 INFO L124 PetriNetUnfolderBase]: 12901/22514 cut-off events. [2024-01-31 17:14:23,226 INFO L125 PetriNetUnfolderBase]: For 308370/308710 co-relation queries the response was YES. [2024-01-31 17:14:23,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131479 conditions, 22514 events. 12901/22514 cut-off events. For 308370/308710 co-relation queries the response was YES. Maximal size of possible extension queue 1005. Compared 182866 event pairs, 5258 based on Foata normal form. 226/22563 useless extension candidates. Maximal degree in co-relation 131300. Up to 9588 conditions per place. [2024-01-31 17:14:23,522 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 504 selfloop transitions, 170 changer transitions 28/718 dead transitions. [2024-01-31 17:14:23,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 718 transitions, 12986 flow [2024-01-31 17:14:23,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-31 17:14:23,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-31 17:14:23,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 373 transitions. [2024-01-31 17:14:23,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383078730904818 [2024-01-31 17:14:23,524 INFO L175 Difference]: Start difference. First operand has 467 places, 557 transitions, 10842 flow. Second operand 23 states and 373 transitions. [2024-01-31 17:14:23,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 718 transitions, 12986 flow [2024-01-31 17:14:25,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 718 transitions, 12218 flow, removed 61 selfloop flow, removed 47 redundant places. [2024-01-31 17:14:25,671 INFO L231 Difference]: Finished difference. Result has 437 places, 557 transitions, 10439 flow [2024-01-31 17:14:25,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=10116, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=10439, PETRI_PLACES=437, PETRI_TRANSITIONS=557} [2024-01-31 17:14:25,672 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 397 predicate places. [2024-01-31 17:14:25,672 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 557 transitions, 10439 flow [2024-01-31 17:14:25,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:14:25,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:14:25,673 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:14:25,684 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 17:14:25,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-01-31 17:14:25,880 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:14:25,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:14:25,880 INFO L85 PathProgramCache]: Analyzing trace with hash 195146297, now seen corresponding path program 16 times [2024-01-31 17:14:25,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:14:25,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581489263] [2024-01-31 17:14:25,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:14:25,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:14:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:14:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:14:26,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:14:26,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581489263] [2024-01-31 17:14:26,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581489263] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:14:26,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644237932] [2024-01-31 17:14:26,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:14:26,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:14:26,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:14:26,892 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 17:14:26,892 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 17:14:27,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:14:27,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:14:27,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-31 17:14:27,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:14:27,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:14:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:14:27,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:14:28,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 70 [2024-01-31 17:14:28,802 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-01-31 17:14:28,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 171 treesize of output 142 [2024-01-31 17:14:29,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:14:29,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644237932] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:14:29,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:14:29,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-01-31 17:14:29,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663106471] [2024-01-31 17:14:29,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:14:29,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-31 17:14:29,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:14:29,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-31 17:14:29,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2024-01-31 17:14:29,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-31 17:14:29,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 557 transitions, 10439 flow. Second operand has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:14:29,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:14:29,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-31 17:14:29,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:14:38,630 INFO L124 PetriNetUnfolderBase]: 13091/22933 cut-off events. [2024-01-31 17:14:38,630 INFO L125 PetriNetUnfolderBase]: For 284091/284433 co-relation queries the response was YES. [2024-01-31 17:14:38,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130345 conditions, 22933 events. 13091/22933 cut-off events. For 284091/284433 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 187412 event pairs, 3469 based on Foata normal form. 205/22960 useless extension candidates. Maximal degree in co-relation 130197. Up to 3320 conditions per place. [2024-01-31 17:14:38,997 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 494 selfloop transitions, 278 changer transitions 49/837 dead transitions. [2024-01-31 17:14:38,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 837 transitions, 13612 flow [2024-01-31 17:14:38,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-31 17:14:38,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-31 17:14:38,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 573 transitions. [2024-01-31 17:14:38,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44247104247104246 [2024-01-31 17:14:38,998 INFO L175 Difference]: Start difference. First operand has 437 places, 557 transitions, 10439 flow. Second operand 35 states and 573 transitions. [2024-01-31 17:14:38,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 837 transitions, 13612 flow [2024-01-31 17:14:41,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 837 transitions, 13331 flow, removed 18 selfloop flow, removed 19 redundant places. [2024-01-31 17:14:41,135 INFO L231 Difference]: Finished difference. Result has 457 places, 562 transitions, 10814 flow [2024-01-31 17:14:41,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=10176, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=10814, PETRI_PLACES=457, PETRI_TRANSITIONS=562} [2024-01-31 17:14:41,136 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 417 predicate places. [2024-01-31 17:14:41,136 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 562 transitions, 10814 flow [2024-01-31 17:14:41,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.368421052631579) internal successors, (356), 38 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:14:41,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:14:41,137 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:14:41,149 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 17:14:41,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-01-31 17:14:41,349 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:14:41,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:14:41,349 INFO L85 PathProgramCache]: Analyzing trace with hash -2032969316, now seen corresponding path program 17 times [2024-01-31 17:14:41,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:14:41,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820558460] [2024-01-31 17:14:41,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:14:41,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:14:41,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat