./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/popl20-figure3.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 958ec4d9 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-figure3.wvr.c ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/popl20-figure3.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-dev-958ec4d-m [2024-02-07 14:38:34,301 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:38:34,334 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:38:34,337 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:38:34,337 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:38:34,354 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:38:34,355 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:38:34,355 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:38:34,356 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:38:34,356 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:38:34,356 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:38:34,356 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:38:34,357 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:38:34,357 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:38:34,357 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:38:34,358 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:38:34,358 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:38:34,358 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:38:34,358 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:38:34,359 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:38:34,359 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:38:34,359 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:38:34,359 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:38:34,360 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:38:34,360 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:38:34,360 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:38:34,360 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:38:34,361 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:38:34,361 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:38:34,361 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:38:34,361 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:38:34,361 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:38:34,362 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:38:34,362 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:38:34,362 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:38:34,362 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:38:34,363 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:38:34,363 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:38:34,363 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:38:34,363 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:38:34,363 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:38:34,364 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:38:34,364 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:38:34,364 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:38:34,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:38:34,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:38:34,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:38:34,554 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:38:34,554 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:38:34,555 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/popl20-figure3.wvr.yml/witness.yml [2024-02-07 14:38:34,616 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:38:34,617 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:38:34,618 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2024-02-07 14:38:35,651 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:38:35,803 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:38:35,804 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2024-02-07 14:38:35,809 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a95cd4be0/e2f17c3869274b0787523515c4287d2c/FLAG1442f35b8 [2024-02-07 14:38:35,820 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a95cd4be0/e2f17c3869274b0787523515c4287d2c [2024-02-07 14:38:35,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:38:35,821 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:38:35,822 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:38:35,822 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:38:35,826 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:38:35,826 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:38:34" (1/2) ... [2024-02-07 14:38:35,827 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b84ab25 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:38:35, skipping insertion in model container [2024-02-07 14:38:35,827 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:38:34" (1/2) ... [2024-02-07 14:38:35,828 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@179bf256 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:38:35, skipping insertion in model container [2024-02-07 14:38:35,828 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:38:35" (2/2) ... [2024-02-07 14:38:35,829 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b84ab25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:35, skipping insertion in model container [2024-02-07 14:38:35,829 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:38:35" (2/2) ... [2024-02-07 14:38:35,829 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:38:35,842 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 14:38:35,843 INFO L76 edCorrectnessWitness]: Location invariant before [L64-L64] ((((0LL - (long long )c) + (long long )counter >= 0LL) && ((long long )c + (long long )counter >= 0LL)) && ((0LL - (long long )c) - (long long )counter >= 0LL)) && ((long long )c - (long long )counter >= 0LL) [2024-02-07 14:38:35,843 INFO L76 edCorrectnessWitness]: Location invariant before [L65-L65] ((((0LL - (long long )c) + (long long )counter >= 0LL) && ((long long )c + (long long )counter >= 0LL)) && ((0LL - (long long )c) - (long long )counter >= 0LL)) && ((long long )c - (long long )counter >= 0LL) [2024-02-07 14:38:35,858 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:38:35,987 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-figure3.wvr.c[2147,2160] [2024-02-07 14:38:35,990 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:38:35,996 INFO L203 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local [2024-02-07 14:38:36,042 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-figure3.wvr.c[2147,2160] [2024-02-07 14:38:36,043 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:38:36,054 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:38:36,055 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:36 WrapperNode [2024-02-07 14:38:36,055 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:38:36,056 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:38:36,056 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:38:36,056 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:38:36,061 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:36" (1/1) ... [2024-02-07 14:38:36,066 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:36" (1/1) ... [2024-02-07 14:38:36,082 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 77 [2024-02-07 14:38:36,083 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:38:36,083 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:38:36,083 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:38:36,084 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:38:36,103 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:36" (1/1) ... [2024-02-07 14:38:36,104 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:36" (1/1) ... [2024-02-07 14:38:36,106 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:36" (1/1) ... [2024-02-07 14:38:36,116 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-02-07 14:38:36,116 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:36" (1/1) ... [2024-02-07 14:38:36,116 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:36" (1/1) ... [2024-02-07 14:38:36,120 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:36" (1/1) ... [2024-02-07 14:38:36,122 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:36" (1/1) ... [2024-02-07 14:38:36,123 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:36" (1/1) ... [2024-02-07 14:38:36,124 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:36" (1/1) ... [2024-02-07 14:38:36,125 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:38:36,126 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:38:36,126 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:38:36,126 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:38:36,127 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:36" (1/1) ... [2024-02-07 14:38:36,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:38:36,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:36,163 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) [2024-02-07 14:38:36,168 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 [2024-02-07 14:38:36,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:38:36,201 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-07 14:38:36,201 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-07 14:38:36,202 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-07 14:38:36,202 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-07 14:38:36,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:38:36,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:38:36,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:38:36,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:38:36,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:38:36,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:38:36,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:38:36,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-07 14:38:36,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-07 14:38:36,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:38:36,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:38:36,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 14:38:36,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 14:38:36,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 14:38:36,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:38:36,205 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 14:38:36,274 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:38:36,275 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:38:36,426 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:38:36,426 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:38:36,526 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:38:36,526 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-07 14:38:36,527 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:38:36 BoogieIcfgContainer [2024-02-07 14:38:36,527 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:38:36,528 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:38:36,528 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:38:36,531 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:38:36,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:38:34" (1/4) ... [2024-02-07 14:38:36,531 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@174fd979 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:38:36, skipping insertion in model container [2024-02-07 14:38:36,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:38:35" (2/4) ... [2024-02-07 14:38:36,532 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@174fd979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:38:36, skipping insertion in model container [2024-02-07 14:38:36,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:36" (3/4) ... [2024-02-07 14:38:36,532 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@174fd979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:38:36, skipping insertion in model container [2024-02-07 14:38:36,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:38:36" (4/4) ... [2024-02-07 14:38:36,533 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2024-02-07 14:38:36,545 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:38:36,545 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-02-07 14:38:36,545 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:38:36,587 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-07 14:38:36,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 27 transitions, 68 flow [2024-02-07 14:38:36,650 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2024-02-07 14:38:36,650 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-07 14:38:36,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 25 events. 2/25 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-02-07 14:38:36,652 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 27 transitions, 68 flow [2024-02-07 14:38:36,655 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 24 transitions, 60 flow [2024-02-07 14:38:36,662 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:38:36,667 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;@624c5a09, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:38:36,668 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-02-07 14:38:36,670 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:38:36,670 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-07 14:38:36,670 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:38:36,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:36,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-07 14:38:36,671 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-07 14:38:36,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:36,675 INFO L85 PathProgramCache]: Analyzing trace with hash 8094, now seen corresponding path program 1 times [2024-02-07 14:38:36,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:36,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40971074] [2024-02-07 14:38:36,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:36,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:36,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:36,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:36,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40971074] [2024-02-07 14:38:36,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40971074] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:38:36,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:38:36,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:38:36,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706820648] [2024-02-07 14:38:36,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:38:36,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:38:36,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:36,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:38:36,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:38:36,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2024-02-07 14:38:36,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:36,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:36,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2024-02-07 14:38:36,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:37,071 INFO L124 PetriNetUnfolderBase]: 51/105 cut-off events. [2024-02-07 14:38:37,072 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-02-07 14:38:37,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 105 events. 51/105 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 263 event pairs, 33 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 160. Up to 93 conditions per place. [2024-02-07 14:38:37,077 INFO L140 encePairwiseOnDemand]: 23/27 looper letters, 16 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2024-02-07 14:38:37,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 22 transitions, 92 flow [2024-02-07 14:38:37,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:38:37,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:38:37,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 38 transitions. [2024-02-07 14:38:37,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2024-02-07 14:38:37,087 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 3 states and 38 transitions. [2024-02-07 14:38:37,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 22 transitions, 92 flow [2024-02-07 14:38:37,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 22 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-07 14:38:37,091 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 52 flow [2024-02-07 14:38:37,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2024-02-07 14:38:37,097 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -4 predicate places. [2024-02-07 14:38:37,097 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 52 flow [2024-02-07 14:38:37,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:37,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:37,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:37,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:38:37,099 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-07 14:38:37,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:37,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1905794440, now seen corresponding path program 1 times [2024-02-07 14:38:37,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:37,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952873937] [2024-02-07 14:38:37,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:37,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:37,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:37,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952873937] [2024-02-07 14:38:37,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952873937] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:38:37,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:38:37,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:38:37,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019896352] [2024-02-07 14:38:37,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:38:37,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:38:37,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:37,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:38:37,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:38:37,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 27 [2024-02-07 14:38:37,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:37,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:37,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 27 [2024-02-07 14:38:37,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:37,342 INFO L124 PetriNetUnfolderBase]: 82/173 cut-off events. [2024-02-07 14:38:37,343 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-07 14:38:37,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 173 events. 82/173 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 557 event pairs, 30 based on Foata normal form. 9/181 useless extension candidates. Maximal degree in co-relation 330. Up to 99 conditions per place. [2024-02-07 14:38:37,346 INFO L140 encePairwiseOnDemand]: 23/27 looper letters, 23 selfloop transitions, 2 changer transitions 4/32 dead transitions. [2024-02-07 14:38:37,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 32 transitions, 133 flow [2024-02-07 14:38:37,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:38:37,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:38:37,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2024-02-07 14:38:37,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6419753086419753 [2024-02-07 14:38:37,349 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 52 flow. Second operand 3 states and 52 transitions. [2024-02-07 14:38:37,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 32 transitions, 133 flow [2024-02-07 14:38:37,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 32 transitions, 129 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:38:37,350 INFO L231 Difference]: Finished difference. Result has 26 places, 23 transitions, 62 flow [2024-02-07 14:38:37,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=26, PETRI_TRANSITIONS=23} [2024-02-07 14:38:37,351 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2024-02-07 14:38:37,351 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 23 transitions, 62 flow [2024-02-07 14:38:37,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:37,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:37,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:37,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 14:38:37,352 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-07 14:38:37,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:37,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1082758538, now seen corresponding path program 1 times [2024-02-07 14:38:37,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:37,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444517184] [2024-02-07 14:38:37,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:37,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:37,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:37,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444517184] [2024-02-07 14:38:37,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444517184] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:38:37,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:38:37,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 14:38:37,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245474590] [2024-02-07 14:38:37,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:38:37,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:38:37,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:37,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:38:37,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:38:37,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2024-02-07 14:38:37,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 62 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:37,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:37,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2024-02-07 14:38:37,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:37,551 INFO L124 PetriNetUnfolderBase]: 146/285 cut-off events. [2024-02-07 14:38:37,551 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-02-07 14:38:37,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 285 events. 146/285 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1131 event pairs, 66 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 245. Up to 191 conditions per place. [2024-02-07 14:38:37,553 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 32 selfloop transitions, 7 changer transitions 3/45 dead transitions. [2024-02-07 14:38:37,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 45 transitions, 195 flow [2024-02-07 14:38:37,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:38:37,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:38:37,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 73 transitions. [2024-02-07 14:38:37,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5407407407407407 [2024-02-07 14:38:37,555 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 62 flow. Second operand 5 states and 73 transitions. [2024-02-07 14:38:37,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 45 transitions, 195 flow [2024-02-07 14:38:37,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 45 transitions, 193 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:38:37,557 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 112 flow [2024-02-07 14:38:37,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=112, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2024-02-07 14:38:37,558 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2024-02-07 14:38:37,558 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 112 flow [2024-02-07 14:38:37,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:37,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:37,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:37,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 14:38:37,559 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-07 14:38:37,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:37,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1181967776, now seen corresponding path program 2 times [2024-02-07 14:38:37,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:37,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264893345] [2024-02-07 14:38:37,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:37,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:37,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:37,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:37,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264893345] [2024-02-07 14:38:37,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264893345] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:38:37,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:38:37,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 14:38:37,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229862430] [2024-02-07 14:38:37,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:38:37,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:38:37,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:37,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:38:37,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-02-07 14:38:37,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2024-02-07 14:38:37,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 112 flow. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:37,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:37,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2024-02-07 14:38:37,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:37,764 INFO L124 PetriNetUnfolderBase]: 166/318 cut-off events. [2024-02-07 14:38:37,764 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2024-02-07 14:38:37,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 318 events. 166/318 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1277 event pairs, 4 based on Foata normal form. 10/326 useless extension candidates. Maximal degree in co-relation 391. Up to 134 conditions per place. [2024-02-07 14:38:37,767 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 49 selfloop transitions, 13 changer transitions 1/66 dead transitions. [2024-02-07 14:38:37,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 66 transitions, 366 flow [2024-02-07 14:38:37,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:38:37,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:38:37,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-02-07 14:38:37,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-02-07 14:38:37,769 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 112 flow. Second operand 7 states and 102 transitions. [2024-02-07 14:38:37,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 66 transitions, 366 flow [2024-02-07 14:38:37,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 66 transitions, 364 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-02-07 14:38:37,771 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 218 flow [2024-02-07 14:38:37,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=218, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2024-02-07 14:38:37,772 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 15 predicate places. [2024-02-07 14:38:37,772 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 218 flow [2024-02-07 14:38:37,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:37,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:37,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:37,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 14:38:37,773 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-07 14:38:37,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:37,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1488141038, now seen corresponding path program 3 times [2024-02-07 14:38:37,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:37,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713724340] [2024-02-07 14:38:37,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:37,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:37,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:37,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:37,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713724340] [2024-02-07 14:38:37,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713724340] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:38:37,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:38:37,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 14:38:37,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709757250] [2024-02-07 14:38:37,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:38:37,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:38:37,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:37,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:38:37,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:38:37,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2024-02-07 14:38:37,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:37,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:37,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2024-02-07 14:38:37,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:38,033 INFO L124 PetriNetUnfolderBase]: 219/419 cut-off events. [2024-02-07 14:38:38,033 INFO L125 PetriNetUnfolderBase]: For 728/728 co-relation queries the response was YES. [2024-02-07 14:38:38,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1501 conditions, 419 events. 219/419 cut-off events. For 728/728 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1694 event pairs, 69 based on Foata normal form. 6/420 useless extension candidates. Maximal degree in co-relation 1001. Up to 179 conditions per place. [2024-02-07 14:38:38,036 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 44 selfloop transitions, 12 changer transitions 2/61 dead transitions. [2024-02-07 14:38:38,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 61 transitions, 451 flow [2024-02-07 14:38:38,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:38:38,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:38:38,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2024-02-07 14:38:38,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-02-07 14:38:38,041 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 218 flow. Second operand 5 states and 72 transitions. [2024-02-07 14:38:38,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 61 transitions, 451 flow [2024-02-07 14:38:38,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 451 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:38:38,050 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 280 flow [2024-02-07 14:38:38,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=280, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2024-02-07 14:38:38,053 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 22 predicate places. [2024-02-07 14:38:38,053 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 280 flow [2024-02-07 14:38:38,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:38,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:38,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:38,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 14:38:38,054 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-07 14:38:38,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:38,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1056244560, now seen corresponding path program 4 times [2024-02-07 14:38:38,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:38,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765053856] [2024-02-07 14:38:38,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:38,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:38,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:38,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765053856] [2024-02-07 14:38:38,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765053856] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:38:38,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552813897] [2024-02-07 14:38:38,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:38:38,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:38,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:38,172 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) [2024-02-07 14:38:38,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-07 14:38:38,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:38:38,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:38:38,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 14:38:38,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:38:38,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:38,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:38:38,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:38,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552813897] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:38:38,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:38:38,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2024-02-07 14:38:38,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286760169] [2024-02-07 14:38:38,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:38:38,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:38:38,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:38,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:38:38,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:38:38,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2024-02-07 14:38:38,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 280 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:38,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:38,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2024-02-07 14:38:38,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:38,630 INFO L124 PetriNetUnfolderBase]: 323/610 cut-off events. [2024-02-07 14:38:38,631 INFO L125 PetriNetUnfolderBase]: For 1498/1498 co-relation queries the response was YES. [2024-02-07 14:38:38,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2352 conditions, 610 events. 323/610 cut-off events. For 1498/1498 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2858 event pairs, 33 based on Foata normal form. 10/612 useless extension candidates. Maximal degree in co-relation 1660. Up to 171 conditions per place. [2024-02-07 14:38:38,635 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 55 selfloop transitions, 35 changer transitions 2/95 dead transitions. [2024-02-07 14:38:38,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 95 transitions, 773 flow [2024-02-07 14:38:38,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:38:38,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:38:38,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 141 transitions. [2024-02-07 14:38:38,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2024-02-07 14:38:38,636 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 280 flow. Second operand 10 states and 141 transitions. [2024-02-07 14:38:38,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 95 transitions, 773 flow [2024-02-07 14:38:38,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 95 transitions, 741 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-02-07 14:38:38,641 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 527 flow [2024-02-07 14:38:38,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=527, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-02-07 14:38:38,641 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 33 predicate places. [2024-02-07 14:38:38,642 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 527 flow [2024-02-07 14:38:38,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:38,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:38,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:38,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-07 14:38:38,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-02-07 14:38:38,864 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-07 14:38:38,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:38,865 INFO L85 PathProgramCache]: Analyzing trace with hash 410498618, now seen corresponding path program 5 times [2024-02-07 14:38:38,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:38,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325379396] [2024-02-07 14:38:38,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:38,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:38,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:38,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:38,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325379396] [2024-02-07 14:38:38,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325379396] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:38:38,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:38:38,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 14:38:38,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595357659] [2024-02-07 14:38:38,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:38:38,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:38:38,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:38,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:38:38,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:38:38,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2024-02-07 14:38:38,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 527 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:38,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:38,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2024-02-07 14:38:38,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:39,009 INFO L124 PetriNetUnfolderBase]: 328/611 cut-off events. [2024-02-07 14:38:39,010 INFO L125 PetriNetUnfolderBase]: For 3245/3245 co-relation queries the response was YES. [2024-02-07 14:38:39,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2868 conditions, 611 events. 328/611 cut-off events. For 3245/3245 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2743 event pairs, 105 based on Foata normal form. 2/608 useless extension candidates. Maximal degree in co-relation 2138. Up to 321 conditions per place. [2024-02-07 14:38:39,014 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 51 selfloop transitions, 20 changer transitions 1/75 dead transitions. [2024-02-07 14:38:39,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 75 transitions, 807 flow [2024-02-07 14:38:39,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:38:39,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:38:39,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2024-02-07 14:38:39,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-02-07 14:38:39,015 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 527 flow. Second operand 5 states and 72 transitions. [2024-02-07 14:38:39,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 75 transitions, 807 flow [2024-02-07 14:38:39,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 75 transitions, 727 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-02-07 14:38:39,021 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 560 flow [2024-02-07 14:38:39,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=560, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-02-07 14:38:39,022 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 35 predicate places. [2024-02-07 14:38:39,022 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 560 flow [2024-02-07 14:38:39,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:39,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:39,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:39,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 14:38:39,023 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-07 14:38:39,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:39,023 INFO L85 PathProgramCache]: Analyzing trace with hash 322561884, now seen corresponding path program 6 times [2024-02-07 14:38:39,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:39,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210395173] [2024-02-07 14:38:39,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:39,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:39,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:39,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:39,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210395173] [2024-02-07 14:38:39,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210395173] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:38:39,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:38:39,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 14:38:39,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353807305] [2024-02-07 14:38:39,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:38:39,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:38:39,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:39,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:38:39,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-02-07 14:38:39,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2024-02-07 14:38:39,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 560 flow. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:39,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:39,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2024-02-07 14:38:39,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:39,193 INFO L124 PetriNetUnfolderBase]: 323/600 cut-off events. [2024-02-07 14:38:39,194 INFO L125 PetriNetUnfolderBase]: For 3160/3160 co-relation queries the response was YES. [2024-02-07 14:38:39,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2793 conditions, 600 events. 323/600 cut-off events. For 3160/3160 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2656 event pairs, 93 based on Foata normal form. 8/603 useless extension candidates. Maximal degree in co-relation 2180. Up to 300 conditions per place. [2024-02-07 14:38:39,197 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 50 selfloop transitions, 26 changer transitions 0/79 dead transitions. [2024-02-07 14:38:39,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 79 transitions, 806 flow [2024-02-07 14:38:39,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:38:39,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:38:39,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 84 transitions. [2024-02-07 14:38:39,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-02-07 14:38:39,199 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 560 flow. Second operand 6 states and 84 transitions. [2024-02-07 14:38:39,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 79 transitions, 806 flow [2024-02-07 14:38:39,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 79 transitions, 758 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-02-07 14:38:39,204 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 589 flow [2024-02-07 14:38:39,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=589, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-02-07 14:38:39,205 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 37 predicate places. [2024-02-07 14:38:39,205 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 589 flow [2024-02-07 14:38:39,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:39,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:39,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:39,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-07 14:38:39,206 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-07 14:38:39,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:39,206 INFO L85 PathProgramCache]: Analyzing trace with hash -313020403, now seen corresponding path program 1 times [2024-02-07 14:38:39,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:39,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384963334] [2024-02-07 14:38:39,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:39,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:39,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:39,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:39,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:39,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384963334] [2024-02-07 14:38:39,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384963334] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:38:39,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302009246] [2024-02-07 14:38:39,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:39,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:39,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:39,281 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) [2024-02-07 14:38:39,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-07 14:38:39,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:39,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:38:39,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:38:39,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 14:38:39,374 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 14:38:39,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302009246] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:38:39,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 14:38:39,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2024-02-07 14:38:39,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412146912] [2024-02-07 14:38:39,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:38:39,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:38:39,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:39,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:38:39,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:38:39,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 27 [2024-02-07 14:38:39,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 589 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:39,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:39,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 27 [2024-02-07 14:38:39,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:39,482 INFO L124 PetriNetUnfolderBase]: 499/995 cut-off events. [2024-02-07 14:38:39,482 INFO L125 PetriNetUnfolderBase]: For 5040/5083 co-relation queries the response was YES. [2024-02-07 14:38:39,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4467 conditions, 995 events. 499/995 cut-off events. For 5040/5083 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5307 event pairs, 99 based on Foata normal form. 17/1000 useless extension candidates. Maximal degree in co-relation 2588. Up to 394 conditions per place. [2024-02-07 14:38:39,488 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 75 selfloop transitions, 6 changer transitions 7/105 dead transitions. [2024-02-07 14:38:39,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 105 transitions, 1112 flow [2024-02-07 14:38:39,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:38:39,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:38:39,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 82 transitions. [2024-02-07 14:38:39,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6074074074074074 [2024-02-07 14:38:39,489 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 589 flow. Second operand 5 states and 82 transitions. [2024-02-07 14:38:39,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 105 transitions, 1112 flow [2024-02-07 14:38:39,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 105 transitions, 1051 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-02-07 14:38:39,497 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 587 flow [2024-02-07 14:38:39,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=587, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2024-02-07 14:38:39,497 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 40 predicate places. [2024-02-07 14:38:39,498 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 587 flow [2024-02-07 14:38:39,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:39,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:39,498 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:39,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-07 14:38:39,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-02-07 14:38:39,709 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-07 14:38:39,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:39,710 INFO L85 PathProgramCache]: Analyzing trace with hash 2052318901, now seen corresponding path program 2 times [2024-02-07 14:38:39,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:39,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130524804] [2024-02-07 14:38:39,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:39,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:39,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:39,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:39,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:39,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130524804] [2024-02-07 14:38:39,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130524804] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:38:39,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677821593] [2024-02-07 14:38:39,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:38:39,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:39,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:39,858 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) [2024-02-07 14:38:39,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-07 14:38:39,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:38:39,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:38:39,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 14:38:39,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:38:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:39,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:38:40,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:40,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677821593] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:38:40,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:38:40,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-07 14:38:40,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063722225] [2024-02-07 14:38:40,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:38:40,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-07 14:38:40,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:40,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-07 14:38:40,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-02-07 14:38:40,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2024-02-07 14:38:40,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 587 flow. Second operand has 15 states, 15 states have (on average 8.733333333333333) internal successors, (131), 15 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:40,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:40,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2024-02-07 14:38:40,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:40,621 INFO L124 PetriNetUnfolderBase]: 1176/2024 cut-off events. [2024-02-07 14:38:40,621 INFO L125 PetriNetUnfolderBase]: For 9591/9617 co-relation queries the response was YES. [2024-02-07 14:38:40,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9811 conditions, 2024 events. 1176/2024 cut-off events. For 9591/9617 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10179 event pairs, 64 based on Foata normal form. 22/2044 useless extension candidates. Maximal degree in co-relation 5871. Up to 671 conditions per place. [2024-02-07 14:38:40,632 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 123 selfloop transitions, 89 changer transitions 7/224 dead transitions. [2024-02-07 14:38:40,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 224 transitions, 2363 flow [2024-02-07 14:38:40,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-02-07 14:38:40,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-02-07 14:38:40,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 277 transitions. [2024-02-07 14:38:40,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48853615520282184 [2024-02-07 14:38:40,634 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 587 flow. Second operand 21 states and 277 transitions. [2024-02-07 14:38:40,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 224 transitions, 2363 flow [2024-02-07 14:38:40,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 224 transitions, 2329 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-02-07 14:38:40,643 INFO L231 Difference]: Finished difference. Result has 97 places, 129 transitions, 1489 flow [2024-02-07 14:38:40,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1489, PETRI_PLACES=97, PETRI_TRANSITIONS=129} [2024-02-07 14:38:40,644 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 68 predicate places. [2024-02-07 14:38:40,644 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 129 transitions, 1489 flow [2024-02-07 14:38:40,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.733333333333333) internal successors, (131), 15 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:40,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:40,644 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:40,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-02-07 14:38:40,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:40,855 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-07 14:38:40,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:40,856 INFO L85 PathProgramCache]: Analyzing trace with hash -624323847, now seen corresponding path program 3 times [2024-02-07 14:38:40,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:40,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563270864] [2024-02-07 14:38:40,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:40,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:40,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:41,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:41,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563270864] [2024-02-07 14:38:41,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563270864] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:38:41,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846097939] [2024-02-07 14:38:41,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:38:41,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:41,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:41,001 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) [2024-02-07 14:38:41,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-07 14:38:41,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-07 14:38:41,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:38:41,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 14:38:41,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:38:41,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:41,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:38:41,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:41,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846097939] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:38:41,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:38:41,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-07 14:38:41,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278313246] [2024-02-07 14:38:41,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:38:41,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-07 14:38:41,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:41,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-07 14:38:41,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-02-07 14:38:41,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2024-02-07 14:38:41,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 129 transitions, 1489 flow. Second operand has 15 states, 15 states have (on average 8.6) internal successors, (129), 15 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:41,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:41,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2024-02-07 14:38:41,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:41,677 INFO L124 PetriNetUnfolderBase]: 1266/2190 cut-off events. [2024-02-07 14:38:41,678 INFO L125 PetriNetUnfolderBase]: For 23337/23363 co-relation queries the response was YES. [2024-02-07 14:38:41,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12909 conditions, 2190 events. 1266/2190 cut-off events. For 23337/23363 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11468 event pairs, 178 based on Foata normal form. 26/2208 useless extension candidates. Maximal degree in co-relation 8596. Up to 974 conditions per place. [2024-02-07 14:38:41,694 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 125 selfloop transitions, 77 changer transitions 11/218 dead transitions. [2024-02-07 14:38:41,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 218 transitions, 2865 flow [2024-02-07 14:38:41,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-07 14:38:41,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-07 14:38:41,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 195 transitions. [2024-02-07 14:38:41,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513888888888889 [2024-02-07 14:38:41,695 INFO L175 Difference]: Start difference. First operand has 97 places, 129 transitions, 1489 flow. Second operand 16 states and 195 transitions. [2024-02-07 14:38:41,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 218 transitions, 2865 flow [2024-02-07 14:38:41,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 218 transitions, 2523 flow, removed 154 selfloop flow, removed 3 redundant places. [2024-02-07 14:38:41,730 INFO L231 Difference]: Finished difference. Result has 119 places, 154 transitions, 1847 flow [2024-02-07 14:38:41,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1847, PETRI_PLACES=119, PETRI_TRANSITIONS=154} [2024-02-07 14:38:41,731 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 90 predicate places. [2024-02-07 14:38:41,731 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 154 transitions, 1847 flow [2024-02-07 14:38:41,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.6) internal successors, (129), 15 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:41,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:41,731 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:41,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-07 14:38:41,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:41,942 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-07 14:38:41,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:41,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1760021333, now seen corresponding path program 4 times [2024-02-07 14:38:41,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:41,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105078292] [2024-02-07 14:38:41,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:41,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:42,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:42,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:42,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105078292] [2024-02-07 14:38:42,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105078292] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:38:42,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809337201] [2024-02-07 14:38:42,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:38:42,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:42,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:42,058 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) [2024-02-07 14:38:42,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-07 14:38:42,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:38:42,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:38:42,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 14:38:42,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:38:42,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:42,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:38:42,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:42,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809337201] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:38:42,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:38:42,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-02-07 14:38:42,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146609326] [2024-02-07 14:38:42,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:38:42,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-07 14:38:42,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:42,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-07 14:38:42,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-02-07 14:38:42,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2024-02-07 14:38:42,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 154 transitions, 1847 flow. Second operand has 12 states, 12 states have (on average 9.75) internal successors, (117), 12 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:42,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:42,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2024-02-07 14:38:42,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:42,841 INFO L124 PetriNetUnfolderBase]: 1701/2893 cut-off events. [2024-02-07 14:38:42,842 INFO L125 PetriNetUnfolderBase]: For 29848/29868 co-relation queries the response was YES. [2024-02-07 14:38:42,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16930 conditions, 2893 events. 1701/2893 cut-off events. For 29848/29868 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 15727 event pairs, 49 based on Foata normal form. 66/2933 useless extension candidates. Maximal degree in co-relation 16485. Up to 907 conditions per place. [2024-02-07 14:38:42,863 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 133 selfloop transitions, 234 changer transitions 3/375 dead transitions. [2024-02-07 14:38:42,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 375 transitions, 4883 flow [2024-02-07 14:38:42,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-07 14:38:42,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-07 14:38:42,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 280 transitions. [2024-02-07 14:38:42,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45088566827697263 [2024-02-07 14:38:42,865 INFO L175 Difference]: Start difference. First operand has 119 places, 154 transitions, 1847 flow. Second operand 23 states and 280 transitions. [2024-02-07 14:38:42,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 375 transitions, 4883 flow [2024-02-07 14:38:42,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 375 transitions, 4742 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-02-07 14:38:42,923 INFO L231 Difference]: Finished difference. Result has 146 places, 289 transitions, 4271 flow [2024-02-07 14:38:42,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1770, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4271, PETRI_PLACES=146, PETRI_TRANSITIONS=289} [2024-02-07 14:38:42,923 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 117 predicate places. [2024-02-07 14:38:42,924 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 289 transitions, 4271 flow [2024-02-07 14:38:42,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.75) internal successors, (117), 12 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:42,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:42,924 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:42,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-07 14:38:43,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-02-07 14:38:43,140 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-07 14:38:43,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:43,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1136810491, now seen corresponding path program 5 times [2024-02-07 14:38:43,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:43,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120693504] [2024-02-07 14:38:43,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:43,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:43,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:43,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120693504] [2024-02-07 14:38:43,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120693504] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:38:43,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821642998] [2024-02-07 14:38:43,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 14:38:43,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:43,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:43,271 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) [2024-02-07 14:38:43,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-07 14:38:43,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:38:43,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:38:43,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-07 14:38:43,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:38:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:43,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:38:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:43,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821642998] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:38:43,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:38:43,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-02-07 14:38:43,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340060669] [2024-02-07 14:38:43,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:38:43,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-07 14:38:43,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:43,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-07 14:38:43,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2024-02-07 14:38:43,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2024-02-07 14:38:43,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 289 transitions, 4271 flow. Second operand has 17 states, 17 states have (on average 8.352941176470589) internal successors, (142), 17 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:43,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:43,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2024-02-07 14:38:43,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:44,978 INFO L124 PetriNetUnfolderBase]: 2401/4168 cut-off events. [2024-02-07 14:38:44,978 INFO L125 PetriNetUnfolderBase]: For 50581/50607 co-relation queries the response was YES. [2024-02-07 14:38:45,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27314 conditions, 4168 events. 2401/4168 cut-off events. For 50581/50607 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 24931 event pairs, 96 based on Foata normal form. 138/4284 useless extension candidates. Maximal degree in co-relation 26896. Up to 1247 conditions per place. [2024-02-07 14:38:45,022 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 164 selfloop transitions, 414 changer transitions 7/590 dead transitions. [2024-02-07 14:38:45,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 590 transitions, 9112 flow [2024-02-07 14:38:45,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-02-07 14:38:45,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-02-07 14:38:45,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 432 transitions. [2024-02-07 14:38:45,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2024-02-07 14:38:45,025 INFO L175 Difference]: Start difference. First operand has 146 places, 289 transitions, 4271 flow. Second operand 38 states and 432 transitions. [2024-02-07 14:38:45,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 590 transitions, 9112 flow [2024-02-07 14:38:45,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 590 transitions, 7857 flow, removed 547 selfloop flow, removed 3 redundant places. [2024-02-07 14:38:45,252 INFO L231 Difference]: Finished difference. Result has 197 places, 460 transitions, 7365 flow [2024-02-07 14:38:45,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=3751, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=7365, PETRI_PLACES=197, PETRI_TRANSITIONS=460} [2024-02-07 14:38:45,253 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 168 predicate places. [2024-02-07 14:38:45,253 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 460 transitions, 7365 flow [2024-02-07 14:38:45,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.352941176470589) internal successors, (142), 17 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:45,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:45,254 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:45,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-07 14:38:45,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:45,466 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-07 14:38:45,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:45,467 INFO L85 PathProgramCache]: Analyzing trace with hash -925696429, now seen corresponding path program 6 times [2024-02-07 14:38:45,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:45,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260756188] [2024-02-07 14:38:45,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:45,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:45,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:45,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:45,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260756188] [2024-02-07 14:38:45,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260756188] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:38:45,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124369773] [2024-02-07 14:38:45,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 14:38:45,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:45,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:45,589 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) [2024-02-07 14:38:45,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-07 14:38:45,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-02-07 14:38:45,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:38:45,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 14:38:45,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:38:45,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:45,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:38:45,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:45,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124369773] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:38:45,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:38:45,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-02-07 14:38:45,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733694919] [2024-02-07 14:38:45,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:38:45,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 14:38:45,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:45,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 14:38:45,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-02-07 14:38:45,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2024-02-07 14:38:45,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 460 transitions, 7365 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:45,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:45,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2024-02-07 14:38:45,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:47,207 INFO L124 PetriNetUnfolderBase]: 3021/5290 cut-off events. [2024-02-07 14:38:47,207 INFO L125 PetriNetUnfolderBase]: For 67284/67314 co-relation queries the response was YES. [2024-02-07 14:38:47,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35481 conditions, 5290 events. 3021/5290 cut-off events. For 67284/67314 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 33246 event pairs, 132 based on Foata normal form. 66/5320 useless extension candidates. Maximal degree in co-relation 34269. Up to 1006 conditions per place. [2024-02-07 14:38:47,259 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 192 selfloop transitions, 509 changer transitions 5/711 dead transitions. [2024-02-07 14:38:47,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 711 transitions, 11971 flow [2024-02-07 14:38:47,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-02-07 14:38:47,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-02-07 14:38:47,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 401 transitions. [2024-02-07 14:38:47,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4500561167227834 [2024-02-07 14:38:47,280 INFO L175 Difference]: Start difference. First operand has 197 places, 460 transitions, 7365 flow. Second operand 33 states and 401 transitions. [2024-02-07 14:38:47,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 711 transitions, 11971 flow [2024-02-07 14:38:47,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 711 transitions, 10948 flow, removed 309 selfloop flow, removed 9 redundant places. [2024-02-07 14:38:47,814 INFO L231 Difference]: Finished difference. Result has 228 places, 598 transitions, 10175 flow [2024-02-07 14:38:47,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6569, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=10175, PETRI_PLACES=228, PETRI_TRANSITIONS=598} [2024-02-07 14:38:47,815 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 199 predicate places. [2024-02-07 14:38:47,815 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 598 transitions, 10175 flow [2024-02-07 14:38:47,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:47,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:47,816 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:47,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-02-07 14:38:48,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:48,027 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-07 14:38:48,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:48,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1169649061, now seen corresponding path program 7 times [2024-02-07 14:38:48,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:48,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746155859] [2024-02-07 14:38:48,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:48,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:48,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:48,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:48,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746155859] [2024-02-07 14:38:48,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746155859] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:38:48,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651354896] [2024-02-07 14:38:48,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 14:38:48,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:48,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:48,113 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) [2024-02-07 14:38:48,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-07 14:38:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:48,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 14:38:48,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:38:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:48,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:38:48,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:48,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651354896] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:38:48,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:38:48,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-02-07 14:38:48,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199628426] [2024-02-07 14:38:48,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:38:48,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 14:38:48,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:48,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 14:38:48,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-02-07 14:38:48,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2024-02-07 14:38:48,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 598 transitions, 10175 flow. Second operand has 14 states, 14 states have (on average 8.714285714285714) internal successors, (122), 14 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:48,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:48,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2024-02-07 14:38:48,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:49,840 INFO L124 PetriNetUnfolderBase]: 3373/5860 cut-off events. [2024-02-07 14:38:49,841 INFO L125 PetriNetUnfolderBase]: For 81716/81746 co-relation queries the response was YES. [2024-02-07 14:38:49,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41145 conditions, 5860 events. 3373/5860 cut-off events. For 81716/81746 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 36548 event pairs, 279 based on Foata normal form. 34/5862 useless extension candidates. Maximal degree in co-relation 40625. Up to 1340 conditions per place. [2024-02-07 14:38:49,890 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 239 selfloop transitions, 509 changer transitions 3/756 dead transitions. [2024-02-07 14:38:49,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 756 transitions, 13826 flow [2024-02-07 14:38:49,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-02-07 14:38:49,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-02-07 14:38:49,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 306 transitions. [2024-02-07 14:38:49,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-02-07 14:38:49,892 INFO L175 Difference]: Start difference. First operand has 228 places, 598 transitions, 10175 flow. Second operand 24 states and 306 transitions. [2024-02-07 14:38:49,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 756 transitions, 13826 flow [2024-02-07 14:38:50,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 756 transitions, 13548 flow, removed 97 selfloop flow, removed 4 redundant places. [2024-02-07 14:38:50,643 INFO L231 Difference]: Finished difference. Result has 249 places, 663 transitions, 12484 flow [2024-02-07 14:38:50,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9800, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=439, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=12484, PETRI_PLACES=249, PETRI_TRANSITIONS=663} [2024-02-07 14:38:50,645 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 220 predicate places. [2024-02-07 14:38:50,645 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 663 transitions, 12484 flow [2024-02-07 14:38:50,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.714285714285714) internal successors, (122), 14 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:50,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:50,645 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:50,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-02-07 14:38:50,856 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,SelfDestructingSolverStorable14 [2024-02-07 14:38:50,857 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-07 14:38:50,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:50,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1141488639, now seen corresponding path program 8 times [2024-02-07 14:38:50,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:50,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905219074] [2024-02-07 14:38:50,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:50,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:50,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:51,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:51,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905219074] [2024-02-07 14:38:51,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905219074] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:38:51,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814718909] [2024-02-07 14:38:51,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:38:51,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:51,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:51,012 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) [2024-02-07 14:38:51,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-07 14:38:51,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:38:51,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:38:51,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 14:38:51,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:38:51,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:51,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:38:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:51,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814718909] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:38:51,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:38:51,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-02-07 14:38:51,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870227480] [2024-02-07 14:38:51,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:38:51,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-07 14:38:51,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:51,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-07 14:38:51,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-02-07 14:38:51,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2024-02-07 14:38:51,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 663 transitions, 12484 flow. Second operand has 16 states, 16 states have (on average 8.625) internal successors, (138), 16 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:51,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:51,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2024-02-07 14:38:51,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:53,094 INFO L124 PetriNetUnfolderBase]: 4277/7416 cut-off events. [2024-02-07 14:38:53,094 INFO L125 PetriNetUnfolderBase]: For 124371/124401 co-relation queries the response was YES. [2024-02-07 14:38:53,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55634 conditions, 7416 events. 4277/7416 cut-off events. For 124371/124401 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 48371 event pairs, 300 based on Foata normal form. 78/7430 useless extension candidates. Maximal degree in co-relation 54610. Up to 1364 conditions per place. [2024-02-07 14:38:53,199 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 250 selfloop transitions, 691 changer transitions 9/955 dead transitions. [2024-02-07 14:38:53,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 955 transitions, 19151 flow [2024-02-07 14:38:53,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-02-07 14:38:53,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-02-07 14:38:53,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 342 transitions. [2024-02-07 14:38:53,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-02-07 14:38:53,202 INFO L175 Difference]: Start difference. First operand has 249 places, 663 transitions, 12484 flow. Second operand 28 states and 342 transitions. [2024-02-07 14:38:53,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 955 transitions, 19151 flow [2024-02-07 14:38:54,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 955 transitions, 18628 flow, removed 127 selfloop flow, removed 6 redundant places. [2024-02-07 14:38:54,754 INFO L231 Difference]: Finished difference. Result has 278 places, 868 transitions, 18680 flow [2024-02-07 14:38:54,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=12075, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=506, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=18680, PETRI_PLACES=278, PETRI_TRANSITIONS=868} [2024-02-07 14:38:54,755 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 249 predicate places. [2024-02-07 14:38:54,755 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 868 transitions, 18680 flow [2024-02-07 14:38:54,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.625) internal successors, (138), 16 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:54,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:54,756 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:54,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-07 14:38:54,966 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 [2024-02-07 14:38:54,968 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-07 14:38:54,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:54,969 INFO L85 PathProgramCache]: Analyzing trace with hash 219111425, now seen corresponding path program 9 times [2024-02-07 14:38:54,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:54,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367199670] [2024-02-07 14:38:54,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:54,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:55,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:55,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367199670] [2024-02-07 14:38:55,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367199670] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:38:55,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676540434] [2024-02-07 14:38:55,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:38:55,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:55,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:55,070 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) [2024-02-07 14:38:55,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-07 14:38:55,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-07 14:38:55,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:38:55,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 14:38:55,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:38:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:55,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:38:55,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:55,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676540434] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:38:55,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:38:55,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-07 14:38:55,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026234747] [2024-02-07 14:38:55,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:38:55,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-07 14:38:55,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:55,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-07 14:38:55,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-02-07 14:38:55,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2024-02-07 14:38:55,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 868 transitions, 18680 flow. Second operand has 15 states, 15 states have (on average 8.6) internal successors, (129), 15 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:55,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:55,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2024-02-07 14:38:55,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:57,367 INFO L124 PetriNetUnfolderBase]: 4263/7396 cut-off events. [2024-02-07 14:38:57,367 INFO L125 PetriNetUnfolderBase]: For 149724/149764 co-relation queries the response was YES. [2024-02-07 14:38:57,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60645 conditions, 7396 events. 4263/7396 cut-off events. For 149724/149764 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 48457 event pairs, 668 based on Foata normal form. 44/7380 useless extension candidates. Maximal degree in co-relation 59736. Up to 3183 conditions per place. [2024-02-07 14:38:57,439 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 400 selfloop transitions, 503 changer transitions 3/911 dead transitions. [2024-02-07 14:38:57,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 911 transitions, 20805 flow [2024-02-07 14:38:57,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-07 14:38:57,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-07 14:38:57,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 179 transitions. [2024-02-07 14:38:57,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-02-07 14:38:57,440 INFO L175 Difference]: Start difference. First operand has 278 places, 868 transitions, 18680 flow. Second operand 14 states and 179 transitions. [2024-02-07 14:38:57,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 911 transitions, 20805 flow [2024-02-07 14:38:59,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 911 transitions, 20317 flow, removed 202 selfloop flow, removed 8 redundant places. [2024-02-07 14:38:59,559 INFO L231 Difference]: Finished difference. Result has 284 places, 868 transitions, 19220 flow [2024-02-07 14:38:59,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=18152, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=866, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=500, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=19220, PETRI_PLACES=284, PETRI_TRANSITIONS=868} [2024-02-07 14:38:59,560 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 255 predicate places. [2024-02-07 14:38:59,561 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 868 transitions, 19220 flow [2024-02-07 14:38:59,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.6) internal successors, (129), 15 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:59,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:59,561 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:59,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-02-07 14:38:59,772 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,SelfDestructingSolverStorable16 [2024-02-07 14:38:59,772 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-07 14:38:59,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:59,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1866420935, now seen corresponding path program 10 times [2024-02-07 14:38:59,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:59,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060001903] [2024-02-07 14:38:59,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:59,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:59,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:59,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:59,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060001903] [2024-02-07 14:38:59,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060001903] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:38:59,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455798558] [2024-02-07 14:38:59,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:38:59,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:59,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:59,870 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) [2024-02-07 14:38:59,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-07 14:38:59,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:38:59,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:38:59,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 14:38:59,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:39:00,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:39:00,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:39:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:39:00,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455798558] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:39:00,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:39:00,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-07 14:39:00,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246232109] [2024-02-07 14:39:00,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:39:00,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-07 14:39:00,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:39:00,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-07 14:39:00,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-02-07 14:39:00,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2024-02-07 14:39:00,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 868 transitions, 19220 flow. Second operand has 15 states, 15 states have (on average 8.933333333333334) internal successors, (134), 15 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:39:00,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:39:00,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2024-02-07 14:39:00,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:39:03,104 INFO L124 PetriNetUnfolderBase]: 5211/9142 cut-off events. [2024-02-07 14:39:03,104 INFO L125 PetriNetUnfolderBase]: For 188624/188662 co-relation queries the response was YES. [2024-02-07 14:39:03,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75316 conditions, 9142 events. 5211/9142 cut-off events. For 188624/188662 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 62838 event pairs, 391 based on Foata normal form. 130/9198 useless extension candidates. Maximal degree in co-relation 74206. Up to 1989 conditions per place. [2024-02-07 14:39:03,352 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 406 selfloop transitions, 843 changer transitions 1/1255 dead transitions. [2024-02-07 14:39:03,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 1255 transitions, 28524 flow [2024-02-07 14:39:03,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-02-07 14:39:03,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-02-07 14:39:03,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 519 transitions. [2024-02-07 14:39:03,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-02-07 14:39:03,361 INFO L175 Difference]: Start difference. First operand has 284 places, 868 transitions, 19220 flow. Second operand 43 states and 519 transitions. [2024-02-07 14:39:03,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 1255 transitions, 28524 flow [2024-02-07 14:39:06,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 1255 transitions, 27190 flow, removed 14 selfloop flow, removed 12 redundant places. [2024-02-07 14:39:06,071 INFO L231 Difference]: Finished difference. Result has 329 places, 1094 transitions, 26455 flow [2024-02-07 14:39:06,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=18107, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=865, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=627, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=26455, PETRI_PLACES=329, PETRI_TRANSITIONS=1094} [2024-02-07 14:39:06,072 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 300 predicate places. [2024-02-07 14:39:06,072 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 1094 transitions, 26455 flow [2024-02-07 14:39:06,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.933333333333334) internal successors, (134), 15 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:39:06,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:39:06,073 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:39:06,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-02-07 14:39:06,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-02-07 14:39:06,285 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-07 14:39:06,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:39:06,285 INFO L85 PathProgramCache]: Analyzing trace with hash -364489171, now seen corresponding path program 11 times [2024-02-07 14:39:06,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:39:06,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407374536] [2024-02-07 14:39:06,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:39:06,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:39:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:39:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:39:06,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:39:06,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407374536] [2024-02-07 14:39:06,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407374536] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:39:06,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890575786] [2024-02-07 14:39:06,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 14:39:06,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:39:06,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:39:06,400 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) [2024-02-07 14:39:06,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-07 14:39:06,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:39:06,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:39:06,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 14:39:06,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:39:06,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:39:06,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:39:06,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:39:06,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890575786] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:39:06,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:39:06,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-02-07 14:39:06,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034013117] [2024-02-07 14:39:06,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:39:06,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 14:39:06,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:39:06,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 14:39:06,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-02-07 14:39:06,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2024-02-07 14:39:06,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 1094 transitions, 26455 flow. Second operand has 13 states, 13 states have (on average 8.692307692307692) internal successors, (113), 13 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:39:06,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:39:06,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2024-02-07 14:39:06,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:39:09,598 INFO L124 PetriNetUnfolderBase]: 5236/9214 cut-off events. [2024-02-07 14:39:09,599 INFO L125 PetriNetUnfolderBase]: For 225609/225647 co-relation queries the response was YES. [2024-02-07 14:39:09,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81204 conditions, 9214 events. 5236/9214 cut-off events. For 225609/225647 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 63798 event pairs, 1828 based on Foata normal form. 48/9171 useless extension candidates. Maximal degree in co-relation 79985. Up to 7129 conditions per place. [2024-02-07 14:39:09,701 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 983 selfloop transitions, 179 changer transitions 4/1171 dead transitions. [2024-02-07 14:39:09,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 1171 transitions, 30065 flow [2024-02-07 14:39:09,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-07 14:39:09,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-07 14:39:09,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 148 transitions. [2024-02-07 14:39:09,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42165242165242167 [2024-02-07 14:39:09,704 INFO L175 Difference]: Start difference. First operand has 329 places, 1094 transitions, 26455 flow. Second operand 13 states and 148 transitions. [2024-02-07 14:39:09,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 1171 transitions, 30065 flow [2024-02-07 14:39:13,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1171 transitions, 29673 flow, removed 58 selfloop flow, removed 12 redundant places. [2024-02-07 14:39:13,836 INFO L231 Difference]: Finished difference. Result has 335 places, 1120 transitions, 27306 flow [2024-02-07 14:39:13,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=26071, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1094, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=925, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=27306, PETRI_PLACES=335, PETRI_TRANSITIONS=1120} [2024-02-07 14:39:13,838 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 306 predicate places. [2024-02-07 14:39:13,838 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 1120 transitions, 27306 flow [2024-02-07 14:39:13,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.692307692307692) internal successors, (113), 13 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:39:13,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:39:13,838 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:39:13,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-02-07 14:39:14,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:39:14,051 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-07 14:39:14,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:39:14,052 INFO L85 PathProgramCache]: Analyzing trace with hash -203810413, now seen corresponding path program 12 times [2024-02-07 14:39:14,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:39:14,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144326249] [2024-02-07 14:39:14,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:39:14,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:39:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:39:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:39:14,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:39:14,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144326249] [2024-02-07 14:39:14,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144326249] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:39:14,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901338930] [2024-02-07 14:39:14,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 14:39:14,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:39:14,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:39:14,181 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) [2024-02-07 14:39:14,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-02-07 14:39:14,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-07 14:39:14,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:39:14,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 14:39:14,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:39:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:39:14,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:39:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:39:14,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901338930] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:39:14,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:39:14,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2024-02-07 14:39:14,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85670643] [2024-02-07 14:39:14,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:39:14,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-07 14:39:14,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:39:14,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-07 14:39:14,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-02-07 14:39:14,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2024-02-07 14:39:14,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 1120 transitions, 27306 flow. Second operand has 15 states, 15 states have (on average 8.866666666666667) internal successors, (133), 15 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:39:14,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:39:14,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2024-02-07 14:39:14,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:39:19,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:39:23,168 INFO L124 PetriNetUnfolderBase]: 6929/12237 cut-off events. [2024-02-07 14:39:23,169 INFO L125 PetriNetUnfolderBase]: For 311169/311217 co-relation queries the response was YES. [2024-02-07 14:39:23,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108427 conditions, 12237 events. 6929/12237 cut-off events. For 311169/311217 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 88704 event pairs, 985 based on Foata normal form. 162/12288 useless extension candidates. Maximal degree in co-relation 107287. Up to 4008 conditions per place. [2024-02-07 14:39:23,313 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 893 selfloop transitions, 771 changer transitions 2/1671 dead transitions. [2024-02-07 14:39:23,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 1671 transitions, 42208 flow [2024-02-07 14:39:23,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-02-07 14:39:23,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-02-07 14:39:23,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 470 transitions. [2024-02-07 14:39:23,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4580896686159844 [2024-02-07 14:39:23,315 INFO L175 Difference]: Start difference. First operand has 335 places, 1120 transitions, 27306 flow. Second operand 38 states and 470 transitions. [2024-02-07 14:39:23,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 1671 transitions, 42208 flow [2024-02-07 14:39:29,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 1671 transitions, 42019 flow, removed 67 selfloop flow, removed 9 redundant places. [2024-02-07 14:39:30,004 INFO L231 Difference]: Finished difference. Result has 380 places, 1424 transitions, 37971 flow [2024-02-07 14:39:30,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=27035, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=488, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=37971, PETRI_PLACES=380, PETRI_TRANSITIONS=1424} [2024-02-07 14:39:30,006 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 351 predicate places. [2024-02-07 14:39:30,006 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 1424 transitions, 37971 flow [2024-02-07 14:39:30,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.866666666666667) internal successors, (133), 15 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:39:30,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:39:30,006 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:39:30,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-02-07 14:39:30,220 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,SelfDestructingSolverStorable19 [2024-02-07 14:39:30,220 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-07 14:39:30,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:39:30,222 INFO L85 PathProgramCache]: Analyzing trace with hash 46795817, now seen corresponding path program 13 times [2024-02-07 14:39:30,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:39:30,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213680716] [2024-02-07 14:39:30,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:39:30,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:39:30,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:39:30,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:39:30,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:39:30,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213680716] [2024-02-07 14:39:30,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213680716] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:39:30,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760599695] [2024-02-07 14:39:30,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 14:39:30,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:39:30,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:39:30,335 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) [2024-02-07 14:39:30,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-02-07 14:39:30,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:39:30,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 14:39:30,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:39:30,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:39:30,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:39:30,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:39:30,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760599695] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:39:30,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:39:30,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-02-07 14:39:30,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181561509] [2024-02-07 14:39:30,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:39:30,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 14:39:30,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:39:30,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 14:39:30,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-02-07 14:39:30,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2024-02-07 14:39:30,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 1424 transitions, 37971 flow. Second operand has 14 states, 14 states have (on average 8.5) internal successors, (119), 14 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:39:30,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:39:30,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2024-02-07 14:39:30,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:39:36,736 INFO L124 PetriNetUnfolderBase]: 8693/15145 cut-off events. [2024-02-07 14:39:36,736 INFO L125 PetriNetUnfolderBase]: For 475203/475261 co-relation queries the response was YES. [2024-02-07 14:39:37,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144787 conditions, 15145 events. 8693/15145 cut-off events. For 475203/475261 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 111703 event pairs, 2120 based on Foata normal form. 72/15098 useless extension candidates. Maximal degree in co-relation 143372. Up to 8955 conditions per place. [2024-02-07 14:39:37,100 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 1059 selfloop transitions, 833 changer transitions 0/1897 dead transitions. [2024-02-07 14:39:37,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 1897 transitions, 53561 flow [2024-02-07 14:39:37,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-07 14:39:37,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-07 14:39:37,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 274 transitions. [2024-02-07 14:39:37,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4612794612794613 [2024-02-07 14:39:37,109 INFO L175 Difference]: Start difference. First operand has 380 places, 1424 transitions, 37971 flow. Second operand 22 states and 274 transitions. [2024-02-07 14:39:37,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 1897 transitions, 53561 flow [2024-02-07 14:39:47,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 1897 transitions, 52740 flow, removed 338 selfloop flow, removed 5 redundant places. [2024-02-07 14:39:47,557 INFO L231 Difference]: Finished difference. Result has 404 places, 1799 transitions, 50581 flow [2024-02-07 14:39:47,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=37336, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=514, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=792, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=50581, PETRI_PLACES=404, PETRI_TRANSITIONS=1799} [2024-02-07 14:39:47,558 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 375 predicate places. [2024-02-07 14:39:47,559 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 1799 transitions, 50581 flow [2024-02-07 14:39:47,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.5) internal successors, (119), 14 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:39:47,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:39:47,559 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:39:47,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-02-07 14:39:47,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:39:47,770 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-07 14:39:47,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:39:47,770 INFO L85 PathProgramCache]: Analyzing trace with hash 2006534215, now seen corresponding path program 14 times [2024-02-07 14:39:47,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:39:47,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439915109] [2024-02-07 14:39:47,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:39:47,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:39:47,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:39:47,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:39:47,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:39:47,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439915109] [2024-02-07 14:39:47,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439915109] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:39:47,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161570565] [2024-02-07 14:39:47,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:39:47,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:39:47,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:39:47,897 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) [2024-02-07 14:39:47,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-02-07 14:39:47,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:39:47,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:39:47,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 14:39:47,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:39:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:39:48,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:39:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:39:48,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161570565] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:39:48,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:39:48,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-07 14:39:48,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604027761] [2024-02-07 14:39:48,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:39:48,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-07 14:39:48,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:39:48,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-07 14:39:48,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-02-07 14:39:48,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2024-02-07 14:39:48,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 1799 transitions, 50581 flow. Second operand has 15 states, 15 states have (on average 9.0) internal successors, (135), 15 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:39:48,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:39:48,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2024-02-07 14:39:48,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:39:58,063 INFO L124 PetriNetUnfolderBase]: 9400/16334 cut-off events. [2024-02-07 14:39:58,063 INFO L125 PetriNetUnfolderBase]: For 548405/548475 co-relation queries the response was YES. [2024-02-07 14:39:58,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163340 conditions, 16334 events. 9400/16334 cut-off events. For 548405/548475 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 121978 event pairs, 1267 based on Foata normal form. 116/16293 useless extension candidates. Maximal degree in co-relation 162021. Up to 6816 conditions per place. [2024-02-07 14:39:58,438 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 861 selfloop transitions, 1151 changer transitions 7/2024 dead transitions. [2024-02-07 14:39:58,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 2024 transitions, 59867 flow [2024-02-07 14:39:58,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-07 14:39:58,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-07 14:39:58,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 249 transitions. [2024-02-07 14:39:58,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-02-07 14:39:58,440 INFO L175 Difference]: Start difference. First operand has 404 places, 1799 transitions, 50581 flow. Second operand 20 states and 249 transitions. [2024-02-07 14:39:58,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 2024 transitions, 59867 flow [2024-02-07 14:40:11,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 2024 transitions, 59231 flow, removed 198 selfloop flow, removed 7 redundant places. [2024-02-07 14:40:11,475 INFO L231 Difference]: Finished difference. Result has 424 places, 1955 transitions, 58397 flow [2024-02-07 14:40:11,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=49922, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1002, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=703, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=58397, PETRI_PLACES=424, PETRI_TRANSITIONS=1955} [2024-02-07 14:40:11,476 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 395 predicate places. [2024-02-07 14:40:11,476 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 1955 transitions, 58397 flow [2024-02-07 14:40:11,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.0) internal successors, (135), 15 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:11,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:11,477 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:40:11,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-02-07 14:40:11,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:40:11,683 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-07 14:40:11,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:11,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1666115347, now seen corresponding path program 15 times [2024-02-07 14:40:11,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:11,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787989625] [2024-02-07 14:40:11,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:11,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:11,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:11,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:11,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787989625] [2024-02-07 14:40:11,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787989625] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:40:11,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995447123] [2024-02-07 14:40:11,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:40:11,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:40:11,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:40:11,780 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) [2024-02-07 14:40:11,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-02-07 14:40:11,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-07 14:40:11,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:40:11,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 14:40:11,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:40:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:11,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:40:11,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:11,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995447123] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:40:11,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:40:11,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-02-07 14:40:11,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767720306] [2024-02-07 14:40:11,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:40:11,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 14:40:11,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:11,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 14:40:11,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-02-07 14:40:11,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2024-02-07 14:40:11,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 1955 transitions, 58397 flow. Second operand has 14 states, 14 states have (on average 8.428571428571429) internal successors, (118), 14 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:11,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:11,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2024-02-07 14:40:11,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:40:20,112 INFO L124 PetriNetUnfolderBase]: 9387/16331 cut-off events. [2024-02-07 14:40:20,112 INFO L125 PetriNetUnfolderBase]: For 620677/620745 co-relation queries the response was YES. [2024-02-07 14:40:20,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171160 conditions, 16331 events. 9387/16331 cut-off events. For 620677/620745 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 122323 event pairs, 2657 based on Foata normal form. 78/16258 useless extension candidates. Maximal degree in co-relation 169733. Up to 11094 conditions per place. [2024-02-07 14:40:20,353 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 1392 selfloop transitions, 602 changer transitions 3/2002 dead transitions. [2024-02-07 14:40:20,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 2002 transitions, 62980 flow [2024-02-07 14:40:20,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-07 14:40:20,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-07 14:40:20,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 172 transitions. [2024-02-07 14:40:20,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-02-07 14:40:20,355 INFO L175 Difference]: Start difference. First operand has 424 places, 1955 transitions, 58397 flow. Second operand 14 states and 172 transitions. [2024-02-07 14:40:20,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 2002 transitions, 62980 flow [2024-02-07 14:40:33,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 2002 transitions, 62466 flow, removed 125 selfloop flow, removed 8 redundant places. [2024-02-07 14:40:33,325 INFO L231 Difference]: Finished difference. Result has 431 places, 1956 transitions, 59147 flow [2024-02-07 14:40:33,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=57834, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1953, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=598, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=59147, PETRI_PLACES=431, PETRI_TRANSITIONS=1956} [2024-02-07 14:40:33,327 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 402 predicate places. [2024-02-07 14:40:33,327 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 1956 transitions, 59147 flow [2024-02-07 14:40:33,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.428571428571429) internal successors, (118), 14 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:33,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:33,327 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:40:33,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-02-07 14:40:33,552 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,SelfDestructingSolverStorable22 [2024-02-07 14:40:33,552 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-07 14:40:33,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:33,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1838881573, now seen corresponding path program 16 times [2024-02-07 14:40:33,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:33,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387059034] [2024-02-07 14:40:33,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:33,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:33,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:33,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:33,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387059034] [2024-02-07 14:40:33,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387059034] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:40:33,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148776152] [2024-02-07 14:40:33,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:40:33,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:40:33,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:40:33,668 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) [2024-02-07 14:40:33,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-02-07 14:40:33,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:40:33,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:40:33,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 14:40:33,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:40:33,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:33,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:40:33,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:33,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148776152] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:40:33,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:40:33,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-07 14:40:33,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559079473] [2024-02-07 14:40:33,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:40:33,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-07 14:40:33,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:33,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-07 14:40:33,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-02-07 14:40:33,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2024-02-07 14:40:33,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 1956 transitions, 59147 flow. Second operand has 15 states, 15 states have (on average 8.4) internal successors, (126), 15 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:33,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:33,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2024-02-07 14:40:33,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:40:40,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:40:51,767 INFO L124 PetriNetUnfolderBase]: 13458/23294 cut-off events. [2024-02-07 14:40:51,767 INFO L125 PetriNetUnfolderBase]: For 915155/915265 co-relation queries the response was YES. [2024-02-07 14:40:52,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248050 conditions, 23294 events. 13458/23294 cut-off events. For 915155/915265 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 180474 event pairs, 1176 based on Foata normal form. 262/23313 useless extension candidates. Maximal degree in co-relation 247390. Up to 5642 conditions per place. [2024-02-07 14:40:52,308 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 817 selfloop transitions, 2059 changer transitions 6/2887 dead transitions. [2024-02-07 14:40:52,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 2887 transitions, 92666 flow [2024-02-07 14:40:52,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-02-07 14:40:52,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-02-07 14:40:52,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 411 transitions. [2024-02-07 14:40:52,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4612794612794613 [2024-02-07 14:40:52,321 INFO L175 Difference]: Start difference. First operand has 431 places, 1956 transitions, 59147 flow. Second operand 33 states and 411 transitions. [2024-02-07 14:40:52,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 2887 transitions, 92666 flow [2024-02-07 14:41:14,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 2887 transitions, 90999 flow, removed 13 selfloop flow, removed 14 redundant places. [2024-02-07 14:41:14,930 INFO L231 Difference]: Finished difference. Result has 457 places, 2756 transitions, 90557 flow [2024-02-07 14:41:14,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=57615, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1943, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=90557, PETRI_PLACES=457, PETRI_TRANSITIONS=2756} [2024-02-07 14:41:14,937 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 428 predicate places. [2024-02-07 14:41:14,937 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 2756 transitions, 90557 flow [2024-02-07 14:41:14,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.4) internal successors, (126), 15 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:14,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:41:14,938 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:41:14,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-02-07 14:41:15,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:41:15,149 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-07 14:41:15,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:41:15,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1764273158, now seen corresponding path program 17 times [2024-02-07 14:41:15,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:41:15,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040548054] [2024-02-07 14:41:15,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:41:15,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:41:15,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:41:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 14:41:15,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:41:15,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040548054] [2024-02-07 14:41:15,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040548054] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:41:15,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273583932] [2024-02-07 14:41:15,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 14:41:15,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:41:15,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:41:15,247 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) [2024-02-07 14:41:15,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-02-07 14:41:15,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-07 14:41:15,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:41:15,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2024-02-07 14:41:15,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:41:15,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 14:41:15,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:41:15,407 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 14:41:15,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273583932] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:41:15,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:41:15,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-02-07 14:41:15,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963431003] [2024-02-07 14:41:15,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:41:15,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 14:41:15,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:41:15,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 14:41:15,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-02-07 14:41:15,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-02-07 14:41:15,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 2756 transitions, 90557 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:15,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:41:15,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-02-07 14:41:15,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand