./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-mult-4.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-mult-4.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-mult-4.wvr.c ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/popl20-mult-4.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 14:40:34,252 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:40:34,319 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:40:34,324 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:40:34,325 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:40:34,350 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:40:34,351 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:40:34,351 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:40:34,351 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:40:34,354 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:40:34,355 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:40:34,355 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:40:34,356 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:40:34,356 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:40:34,357 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:40:34,357 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:40:34,357 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:40:34,357 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:40:34,357 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:40:34,357 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:40:34,358 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:40:34,358 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:40:34,358 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:40:34,358 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:40:34,358 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:40:34,358 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:40:34,359 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:40:34,359 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:40:34,359 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:40:34,359 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:40:34,360 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:40:34,360 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:40:34,360 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:40:34,360 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:40:34,361 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:40:34,361 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:40:34,361 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:40:34,361 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:40:34,361 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:40:34,361 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:40:34,361 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:40:34,362 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:40:34,362 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:40:34,362 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:40:34,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:40:34,600 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:40:34,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:40:34,604 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:40:34,605 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:40:34,606 INFO L431 ainManager$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-mult-4.wvr.yml/witness.yml [2024-02-07 14:40:34,699 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:40:34,699 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:40:34,700 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c [2024-02-07 14:40:35,590 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:40:35,746 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:40:35,747 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c [2024-02-07 14:40:35,752 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf18d8d3a/0347f03a2ed04362ad543c63db312a88/FLAG99dc2099a [2024-02-07 14:40:36,172 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf18d8d3a/0347f03a2ed04362ad543c63db312a88 [2024-02-07 14:40:36,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:40:36,174 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:40:36,176 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:40:36,176 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:40:36,179 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:40:36,180 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:40:34" (1/2) ... [2024-02-07 14:40:36,181 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@561ff56a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:40:36, skipping insertion in model container [2024-02-07 14:40:36,181 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:40:34" (1/2) ... [2024-02-07 14:40:36,182 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@69a76b14 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:40:36, skipping insertion in model container [2024-02-07 14:40:36,182 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:40:36" (2/2) ... [2024-02-07 14:40:36,183 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@561ff56a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:40:36, skipping insertion in model container [2024-02-07 14:40:36,183 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:40:36" (2/2) ... [2024-02-07 14:40:36,184 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:40:36,198 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 14:40:36,201 INFO L76 edCorrectnessWitness]: Location invariant before [L85-L85] ((((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 14:40:36,201 INFO L76 edCorrectnessWitness]: Location invariant before [L86-L86] ((((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 14:40:36,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:40:36,385 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-mult-4.wvr.c[2664,2677] [2024-02-07 14:40:36,393 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:40:36,400 INFO L203 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local [2024-02-07 14:40:36,496 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-mult-4.wvr.c[2664,2677] [2024-02-07 14:40:36,499 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:40:36,512 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:40:36,513 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:40:36 WrapperNode [2024-02-07 14:40:36,513 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:40:36,514 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:40:36,514 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:40:36,515 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:40:36,519 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:40:36" (1/1) ... [2024-02-07 14:40:36,537 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:40:36" (1/1) ... [2024-02-07 14:40:36,559 INFO L138 Inliner]: procedures = 23, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 124 [2024-02-07 14:40:36,560 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:40:36,560 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:40:36,561 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:40:36,561 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:40:36,569 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:40:36" (1/1) ... [2024-02-07 14:40:36,569 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:40:36" (1/1) ... [2024-02-07 14:40:36,580 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:40:36" (1/1) ... [2024-02-07 14:40:36,618 INFO L175 MemorySlicer]: Split 10 memory accesses to 5 slices as follows [2, 2, 2, 2, 2]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-02-07 14:40:36,618 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:40:36" (1/1) ... [2024-02-07 14:40:36,619 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:40:36" (1/1) ... [2024-02-07 14:40:36,627 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:40:36" (1/1) ... [2024-02-07 14:40:36,633 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:40:36" (1/1) ... [2024-02-07 14:40:36,635 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:40:36" (1/1) ... [2024-02-07 14:40:36,639 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:40:36" (1/1) ... [2024-02-07 14:40:36,642 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:40:36,644 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:40:36,644 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:40:36,644 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:40:36,645 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:40:36" (1/1) ... [2024-02-07 14:40:36,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:40:36,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:40:36,686 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 14:40:36,694 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 14:40:36,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:40:36,714 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-07 14:40:36,714 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-07 14:40:36,714 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-07 14:40:36,714 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-07 14:40:36,715 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-02-07 14:40:36,715 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-02-07 14:40:36,715 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-02-07 14:40:36,715 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-02-07 14:40:36,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:40:36,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:40:36,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:40:36,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-07 14:40:36,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-07 14:40:36,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:40:36,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:40:36,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:40:36,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:40:36,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-07 14:40:36,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-07 14:40:36,717 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-07 14:40:36,717 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-07 14:40:36,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:40:36,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:40:36,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 14:40:36,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 14:40:36,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 14:40:36,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-07 14:40:36,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-07 14:40:36,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:40:36,719 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 14:40:36,826 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:40:36,828 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:40:37,028 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:40:37,029 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:40:37,162 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:40:37,163 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-02-07 14:40:37,163 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:40:37 BoogieIcfgContainer [2024-02-07 14:40:37,163 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:40:37,165 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:40:37,165 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:40:37,170 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:40:37,170 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:40:34" (1/4) ... [2024-02-07 14:40:37,170 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c14a575 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:40:37, skipping insertion in model container [2024-02-07 14:40:37,171 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:40:36" (2/4) ... [2024-02-07 14:40:37,171 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c14a575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:40:37, skipping insertion in model container [2024-02-07 14:40:37,172 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:40:36" (3/4) ... [2024-02-07 14:40:37,172 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c14a575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:40:37, skipping insertion in model container [2024-02-07 14:40:37,173 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:40:37" (4/4) ... [2024-02-07 14:40:37,174 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-4.wvr.c [2024-02-07 14:40:37,187 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:40:37,188 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-02-07 14:40:37,188 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:40:37,254 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-02-07 14:40:37,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 122 flow [2024-02-07 14:40:37,328 INFO L124 PetriNetUnfolderBase]: 4/43 cut-off events. [2024-02-07 14:40:37,331 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-07 14:40:37,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 43 events. 4/43 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 53 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-02-07 14:40:37,335 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 122 flow [2024-02-07 14:40:37,338 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 42 transitions, 108 flow [2024-02-07 14:40:37,345 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:40:37,358 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;@29356249, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:40:37,359 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-02-07 14:40:37,364 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:40:37,364 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-07 14:40:37,364 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:40:37,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:37,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-07 14:40:37,365 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:40:37,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:37,371 INFO L85 PathProgramCache]: Analyzing trace with hash 12450, now seen corresponding path program 1 times [2024-02-07 14:40:37,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:37,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376128935] [2024-02-07 14:40:37,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:37,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:37,743 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 14:40:37,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:37,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376128935] [2024-02-07 14:40:37,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376128935] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:40:37,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:40:37,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:40:37,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929696891] [2024-02-07 14:40:37,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:40:37,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:40:37,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:37,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:40:37,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:40:37,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-02-07 14:40:37,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 14:40:37,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:37,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-02-07 14:40:37,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:40:38,071 INFO L124 PetriNetUnfolderBase]: 1623/2214 cut-off events. [2024-02-07 14:40:38,072 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2024-02-07 14:40:38,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4535 conditions, 2214 events. 1623/2214 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8237 event pairs, 1109 based on Foata normal form. 0/2148 useless extension candidates. Maximal degree in co-relation 3505. Up to 2145 conditions per place. [2024-02-07 14:40:38,086 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 31 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2024-02-07 14:40:38,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 40 transitions, 170 flow [2024-02-07 14:40:38,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:40:38,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:40:38,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-02-07 14:40:38,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48226950354609927 [2024-02-07 14:40:38,114 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 108 flow. Second operand 3 states and 68 transitions. [2024-02-07 14:40:38,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 40 transitions, 170 flow [2024-02-07 14:40:38,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 40 transitions, 154 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-02-07 14:40:38,123 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 92 flow [2024-02-07 14:40:38,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2024-02-07 14:40:38,128 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -8 predicate places. [2024-02-07 14:40:38,128 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 92 flow [2024-02-07 14:40:38,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 14:40:38,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:38,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:40:38,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:40:38,129 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:40:38,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:38,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1609689637, now seen corresponding path program 1 times [2024-02-07 14:40:38,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:38,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68579181] [2024-02-07 14:40:38,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:38,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:38,272 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 14:40:38,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:38,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68579181] [2024-02-07 14:40:38,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68579181] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:40:38,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:40:38,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:40:38,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448517762] [2024-02-07 14:40:38,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:40:38,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:40:38,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:38,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:40:38,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:40:38,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-02-07 14:40:38,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 14:40:38,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:38,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-02-07 14:40:38,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:40:38,626 INFO L124 PetriNetUnfolderBase]: 3350/4626 cut-off events. [2024-02-07 14:40:38,626 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-02-07 14:40:38,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9218 conditions, 4626 events. 3350/4626 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 20124 event pairs, 860 based on Foata normal form. 147/4763 useless extension candidates. Maximal degree in co-relation 9207. Up to 3527 conditions per place. [2024-02-07 14:40:38,648 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 53 selfloop transitions, 3 changer transitions 3/64 dead transitions. [2024-02-07 14:40:38,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 64 transitions, 265 flow [2024-02-07 14:40:38,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:40:38,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:40:38,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-02-07 14:40:38,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6737588652482269 [2024-02-07 14:40:38,655 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 92 flow. Second operand 3 states and 95 transitions. [2024-02-07 14:40:38,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 64 transitions, 265 flow [2024-02-07 14:40:38,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 64 transitions, 261 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:40:38,658 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 111 flow [2024-02-07 14:40:38,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2024-02-07 14:40:38,659 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -7 predicate places. [2024-02-07 14:40:38,659 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 111 flow [2024-02-07 14:40:38,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 14:40:38,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:38,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:40:38,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 14:40:38,660 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:40:38,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:38,663 INFO L85 PathProgramCache]: Analyzing trace with hash 365314403, now seen corresponding path program 1 times [2024-02-07 14:40:38,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:38,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636977276] [2024-02-07 14:40:38,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:38,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:38,885 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 14:40:38,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:38,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636977276] [2024-02-07 14:40:38,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636977276] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:40:38,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:40:38,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 14:40:38,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130955470] [2024-02-07 14:40:38,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:40:38,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:40:38,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:38,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:40:38,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:40:38,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 14:40:38,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 111 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 14:40:38,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:38,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 14:40:38,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:40:39,969 INFO L124 PetriNetUnfolderBase]: 12613/16841 cut-off events. [2024-02-07 14:40:39,970 INFO L125 PetriNetUnfolderBase]: For 987/987 co-relation queries the response was YES. [2024-02-07 14:40:39,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35680 conditions, 16841 events. 12613/16841 cut-off events. For 987/987 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 85410 event pairs, 4709 based on Foata normal form. 0/13337 useless extension candidates. Maximal degree in co-relation 10232. Up to 9446 conditions per place. [2024-02-07 14:40:40,062 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 86 selfloop transitions, 10 changer transitions 0/101 dead transitions. [2024-02-07 14:40:40,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 101 transitions, 438 flow [2024-02-07 14:40:40,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:40:40,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:40:40,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-02-07 14:40:40,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6127659574468085 [2024-02-07 14:40:40,067 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 111 flow. Second operand 5 states and 144 transitions. [2024-02-07 14:40:40,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 101 transitions, 438 flow [2024-02-07 14:40:40,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 101 transitions, 435 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:40:40,071 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 175 flow [2024-02-07 14:40:40,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=50, PETRI_TRANSITIONS=51} [2024-02-07 14:40:40,072 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -1 predicate places. [2024-02-07 14:40:40,072 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 175 flow [2024-02-07 14:40:40,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 14:40:40,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:40,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:40:40,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 14:40:40,073 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:40:40,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:40,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1482639371, now seen corresponding path program 2 times [2024-02-07 14:40:40,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:40,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861096407] [2024-02-07 14:40:40,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:40,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:40,173 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 14:40:40,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:40,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861096407] [2024-02-07 14:40:40,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861096407] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:40:40,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:40:40,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 14:40:40,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343839474] [2024-02-07 14:40:40,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:40:40,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:40:40,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:40,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:40:40,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:40:40,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 14:40:40,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 51 transitions, 175 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:40,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:40,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 14:40:40,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:40:41,526 INFO L124 PetriNetUnfolderBase]: 18418/24775 cut-off events. [2024-02-07 14:40:41,526 INFO L125 PetriNetUnfolderBase]: For 10865/10943 co-relation queries the response was YES. [2024-02-07 14:40:41,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64830 conditions, 24775 events. 18418/24775 cut-off events. For 10865/10943 co-relation queries the response was YES. Maximal size of possible extension queue 1031. Compared 135042 event pairs, 3252 based on Foata normal form. 714/25077 useless extension candidates. Maximal degree in co-relation 37332. Up to 13675 conditions per place. [2024-02-07 14:40:41,746 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 93 selfloop transitions, 8 changer transitions 3/109 dead transitions. [2024-02-07 14:40:41,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 109 transitions, 574 flow [2024-02-07 14:40:41,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:40:41,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:40:41,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-02-07 14:40:41,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6542553191489362 [2024-02-07 14:40:41,748 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 175 flow. Second operand 4 states and 123 transitions. [2024-02-07 14:40:41,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 109 transitions, 574 flow [2024-02-07 14:40:41,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 109 transitions, 574 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:40:41,755 INFO L231 Difference]: Finished difference. Result has 56 places, 59 transitions, 261 flow [2024-02-07 14:40:41,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=261, PETRI_PLACES=56, PETRI_TRANSITIONS=59} [2024-02-07 14:40:41,756 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2024-02-07 14:40:41,756 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 59 transitions, 261 flow [2024-02-07 14:40:41,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:41,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:41,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:40:41,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 14:40:41,757 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:40:41,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:41,757 INFO L85 PathProgramCache]: Analyzing trace with hash -44138523, now seen corresponding path program 1 times [2024-02-07 14:40:41,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:41,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795398458] [2024-02-07 14:40:41,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:41,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:41,845 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 14:40:41,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:41,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795398458] [2024-02-07 14:40:41,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795398458] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:40:41,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:40:41,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 14:40:41,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779338069] [2024-02-07 14:40:41,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:40:41,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:40:41,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:41,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:40:41,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:40:41,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 14:40:41,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 261 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 14:40:41,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:41,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 14:40:41,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:40:43,472 INFO L124 PetriNetUnfolderBase]: 20614/27802 cut-off events. [2024-02-07 14:40:43,472 INFO L125 PetriNetUnfolderBase]: For 28835/28857 co-relation queries the response was YES. [2024-02-07 14:40:43,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81180 conditions, 27802 events. 20614/27802 cut-off events. For 28835/28857 co-relation queries the response was YES. Maximal size of possible extension queue 1107. Compared 154836 event pairs, 6009 based on Foata normal form. 892/28098 useless extension candidates. Maximal degree in co-relation 45206. Up to 12265 conditions per place. [2024-02-07 14:40:43,729 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 92 selfloop transitions, 9 changer transitions 19/125 dead transitions. [2024-02-07 14:40:43,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 125 transitions, 738 flow [2024-02-07 14:40:43,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:40:43,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:40:43,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-02-07 14:40:43,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-02-07 14:40:43,731 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 261 flow. Second operand 5 states and 150 transitions. [2024-02-07 14:40:43,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 125 transitions, 738 flow [2024-02-07 14:40:43,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 125 transitions, 738 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:40:43,748 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 312 flow [2024-02-07 14:40:43,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-02-07 14:40:43,750 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2024-02-07 14:40:43,750 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 312 flow [2024-02-07 14:40:43,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 14:40:43,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:43,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:40:43,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 14:40:43,751 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:40:43,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:43,751 INFO L85 PathProgramCache]: Analyzing trace with hash 885229711, now seen corresponding path program 2 times [2024-02-07 14:40:43,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:43,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652343160] [2024-02-07 14:40:43,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:43,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:43,813 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 14:40:43,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:43,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652343160] [2024-02-07 14:40:43,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652343160] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:40:43,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:40:43,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 14:40:43,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607681788] [2024-02-07 14:40:43,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:40:43,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:40:43,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:43,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:40:43,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:40:43,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 14:40:43,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 312 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:43,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:43,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 14:40:43,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:40:45,797 INFO L124 PetriNetUnfolderBase]: 26033/35401 cut-off events. [2024-02-07 14:40:45,797 INFO L125 PetriNetUnfolderBase]: For 62288/62364 co-relation queries the response was YES. [2024-02-07 14:40:45,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116935 conditions, 35401 events. 26033/35401 cut-off events. For 62288/62364 co-relation queries the response was YES. Maximal size of possible extension queue 1285. Compared 203702 event pairs, 8430 based on Foata normal form. 420/35075 useless extension candidates. Maximal degree in co-relation 40060. Up to 17804 conditions per place. [2024-02-07 14:40:46,176 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 96 selfloop transitions, 12 changer transitions 0/113 dead transitions. [2024-02-07 14:40:46,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 113 transitions, 761 flow [2024-02-07 14:40:46,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:40:46,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:40:46,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-02-07 14:40:46,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6542553191489362 [2024-02-07 14:40:46,178 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 312 flow. Second operand 4 states and 123 transitions. [2024-02-07 14:40:46,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 113 transitions, 761 flow [2024-02-07 14:40:46,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 113 transitions, 731 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-07 14:40:46,283 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 360 flow [2024-02-07 14:40:46,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=360, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2024-02-07 14:40:46,284 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 12 predicate places. [2024-02-07 14:40:46,284 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 360 flow [2024-02-07 14:40:46,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:46,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:46,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:40:46,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 14:40:46,285 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:40:46,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:46,285 INFO L85 PathProgramCache]: Analyzing trace with hash 655337637, now seen corresponding path program 3 times [2024-02-07 14:40:46,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:46,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828718885] [2024-02-07 14:40:46,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:46,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:46,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:46,377 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 14:40:46,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:46,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828718885] [2024-02-07 14:40:46,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828718885] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:40:46,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:40:46,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 14:40:46,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689484603] [2024-02-07 14:40:46,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:40:46,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:40:46,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:46,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:40:46,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:40:46,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 14:40:46,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 360 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 14:40:46,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:46,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 14:40:46,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:40:48,698 INFO L124 PetriNetUnfolderBase]: 31647/42697 cut-off events. [2024-02-07 14:40:48,698 INFO L125 PetriNetUnfolderBase]: For 102719/102741 co-relation queries the response was YES. [2024-02-07 14:40:48,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149989 conditions, 42697 events. 31647/42697 cut-off events. For 102719/102741 co-relation queries the response was YES. Maximal size of possible extension queue 1563. Compared 248094 event pairs, 9769 based on Foata normal form. 216/41961 useless extension candidates. Maximal degree in co-relation 62222. Up to 23942 conditions per place. [2024-02-07 14:40:48,887 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 118 selfloop transitions, 19 changer transitions 4/146 dead transitions. [2024-02-07 14:40:48,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 146 transitions, 1221 flow [2024-02-07 14:40:48,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:40:48,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:40:48,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-02-07 14:40:48,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-02-07 14:40:48,889 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 360 flow. Second operand 5 states and 141 transitions. [2024-02-07 14:40:48,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 146 transitions, 1221 flow [2024-02-07 14:40:48,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 146 transitions, 1113 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-02-07 14:40:48,914 INFO L231 Difference]: Finished difference. Result has 67 places, 73 transitions, 456 flow [2024-02-07 14:40:48,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=456, PETRI_PLACES=67, PETRI_TRANSITIONS=73} [2024-02-07 14:40:48,914 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2024-02-07 14:40:48,914 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 73 transitions, 456 flow [2024-02-07 14:40:48,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 14:40:48,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:48,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:40:48,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 14:40:48,915 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:40:48,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:48,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1385837083, now seen corresponding path program 3 times [2024-02-07 14:40:48,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:48,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826190190] [2024-02-07 14:40:48,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:48,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:48,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:48,980 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 14:40:48,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:48,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826190190] [2024-02-07 14:40:48,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826190190] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:40:48,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:40:48,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 14:40:48,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443355810] [2024-02-07 14:40:48,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:40:48,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:40:48,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:48,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:40:48,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:40:48,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 14:40:48,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 73 transitions, 456 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:48,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:48,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 14:40:48,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:40:51,934 INFO L124 PetriNetUnfolderBase]: 38206/51870 cut-off events. [2024-02-07 14:40:51,935 INFO L125 PetriNetUnfolderBase]: For 136860/136998 co-relation queries the response was YES. [2024-02-07 14:40:52,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196818 conditions, 51870 events. 38206/51870 cut-off events. For 136860/136998 co-relation queries the response was YES. Maximal size of possible extension queue 2014. Compared 313764 event pairs, 10264 based on Foata normal form. 1012/51654 useless extension candidates. Maximal degree in co-relation 75274. Up to 35379 conditions per place. [2024-02-07 14:40:52,228 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 102 selfloop transitions, 11 changer transitions 16/134 dead transitions. [2024-02-07 14:40:52,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 134 transitions, 1065 flow [2024-02-07 14:40:52,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:40:52,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:40:52,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-02-07 14:40:52,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6436170212765957 [2024-02-07 14:40:52,230 INFO L175 Difference]: Start difference. First operand has 67 places, 73 transitions, 456 flow. Second operand 4 states and 121 transitions. [2024-02-07 14:40:52,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 134 transitions, 1065 flow [2024-02-07 14:40:52,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 134 transitions, 1036 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:40:52,269 INFO L231 Difference]: Finished difference. Result has 71 places, 80 transitions, 551 flow [2024-02-07 14:40:52,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=551, PETRI_PLACES=71, PETRI_TRANSITIONS=80} [2024-02-07 14:40:52,270 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 20 predicate places. [2024-02-07 14:40:52,270 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 80 transitions, 551 flow [2024-02-07 14:40:52,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:52,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:52,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:40:52,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-07 14:40:52,271 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:40:52,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:52,271 INFO L85 PathProgramCache]: Analyzing trace with hash -583640541, now seen corresponding path program 4 times [2024-02-07 14:40:52,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:52,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258088200] [2024-02-07 14:40:52,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:52,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:52,340 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 14:40:52,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:52,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258088200] [2024-02-07 14:40:52,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258088200] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:40:52,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:40:52,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 14:40:52,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601327308] [2024-02-07 14:40:52,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:40:52,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:40:52,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:52,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:40:52,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:40:52,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 14:40:52,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 80 transitions, 551 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 14:40:52,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:52,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 14:40:52,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:40:56,462 INFO L124 PetriNetUnfolderBase]: 49779/67961 cut-off events. [2024-02-07 14:40:56,463 INFO L125 PetriNetUnfolderBase]: For 199137/199316 co-relation queries the response was YES. [2024-02-07 14:40:56,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257952 conditions, 67961 events. 49779/67961 cut-off events. For 199137/199316 co-relation queries the response was YES. Maximal size of possible extension queue 2464. Compared 426415 event pairs, 19807 based on Foata normal form. 288/66573 useless extension candidates. Maximal degree in co-relation 102488. Up to 41231 conditions per place. [2024-02-07 14:40:56,822 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 147 selfloop transitions, 23 changer transitions 4/179 dead transitions. [2024-02-07 14:40:56,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 179 transitions, 1636 flow [2024-02-07 14:40:56,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:40:56,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:40:56,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-02-07 14:40:56,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-02-07 14:40:56,824 INFO L175 Difference]: Start difference. First operand has 71 places, 80 transitions, 551 flow. Second operand 5 states and 141 transitions. [2024-02-07 14:40:56,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 179 transitions, 1636 flow [2024-02-07 14:40:56,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 179 transitions, 1625 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:40:56,944 INFO L231 Difference]: Finished difference. Result has 77 places, 99 transitions, 828 flow [2024-02-07 14:40:56,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=828, PETRI_PLACES=77, PETRI_TRANSITIONS=99} [2024-02-07 14:40:56,946 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 26 predicate places. [2024-02-07 14:40:56,946 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 99 transitions, 828 flow [2024-02-07 14:40:56,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 14:40:56,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:56,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:40:56,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-07 14:40:56,947 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:40:56,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:56,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1818774739, now seen corresponding path program 4 times [2024-02-07 14:40:56,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:56,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431029719] [2024-02-07 14:40:56,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:56,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:57,027 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 14:40:57,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:57,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431029719] [2024-02-07 14:40:57,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431029719] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:40:57,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:40:57,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 14:40:57,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476954774] [2024-02-07 14:40:57,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:40:57,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:40:57,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:57,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:40:57,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:40:57,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 14:40:57,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 99 transitions, 828 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:57,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:57,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 14:40:57,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:41:01,585 INFO L124 PetriNetUnfolderBase]: 49334/66770 cut-off events. [2024-02-07 14:41:01,585 INFO L125 PetriNetUnfolderBase]: For 302478/302582 co-relation queries the response was YES. [2024-02-07 14:41:01,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286043 conditions, 66770 events. 49334/66770 cut-off events. For 302478/302582 co-relation queries the response was YES. Maximal size of possible extension queue 2396. Compared 410750 event pairs, 14988 based on Foata normal form. 1174/65910 useless extension candidates. Maximal degree in co-relation 230082. Up to 30978 conditions per place. [2024-02-07 14:41:01,984 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 99 selfloop transitions, 37 changer transitions 13/154 dead transitions. [2024-02-07 14:41:01,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 154 transitions, 1487 flow [2024-02-07 14:41:01,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:41:01,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:41:01,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-02-07 14:41:01,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-02-07 14:41:01,987 INFO L175 Difference]: Start difference. First operand has 77 places, 99 transitions, 828 flow. Second operand 4 states and 120 transitions. [2024-02-07 14:41:01,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 154 transitions, 1487 flow [2024-02-07 14:41:02,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 154 transitions, 1467 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-02-07 14:41:02,280 INFO L231 Difference]: Finished difference. Result has 81 places, 97 transitions, 909 flow [2024-02-07 14:41:02,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=909, PETRI_PLACES=81, PETRI_TRANSITIONS=97} [2024-02-07 14:41:02,282 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 30 predicate places. [2024-02-07 14:41:02,282 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 97 transitions, 909 flow [2024-02-07 14:41:02,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:02,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:41:02,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:41:02,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-07 14:41:02,283 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:41:02,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:41:02,284 INFO L85 PathProgramCache]: Analyzing trace with hash 525357963, now seen corresponding path program 5 times [2024-02-07 14:41:02,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:41:02,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706160752] [2024-02-07 14:41:02,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:41:02,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:41:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:41:02,363 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 14:41:02,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:41:02,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706160752] [2024-02-07 14:41:02,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706160752] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:41:02,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:41:02,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 14:41:02,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508543244] [2024-02-07 14:41:02,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:41:02,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:41:02,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:41:02,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:41:02,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:41:02,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 14:41:02,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 97 transitions, 909 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:02,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:41:02,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 14:41:02,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:41:06,860 INFO L124 PetriNetUnfolderBase]: 48311/65014 cut-off events. [2024-02-07 14:41:06,860 INFO L125 PetriNetUnfolderBase]: For 353143/353311 co-relation queries the response was YES. [2024-02-07 14:41:07,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295846 conditions, 65014 events. 48311/65014 cut-off events. For 353143/353311 co-relation queries the response was YES. Maximal size of possible extension queue 2389. Compared 393457 event pairs, 13502 based on Foata normal form. 1230/64419 useless extension candidates. Maximal degree in co-relation 224088. Up to 32366 conditions per place. [2024-02-07 14:41:07,665 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 156 selfloop transitions, 23 changer transitions 2/186 dead transitions. [2024-02-07 14:41:07,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 186 transitions, 2143 flow [2024-02-07 14:41:07,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:41:07,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:41:07,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2024-02-07 14:41:07,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6329787234042553 [2024-02-07 14:41:07,667 INFO L175 Difference]: Start difference. First operand has 81 places, 97 transitions, 909 flow. Second operand 4 states and 119 transitions. [2024-02-07 14:41:07,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 186 transitions, 2143 flow [2024-02-07 14:41:07,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 186 transitions, 2036 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-02-07 14:41:07,817 INFO L231 Difference]: Finished difference. Result has 83 places, 103 transitions, 1077 flow [2024-02-07 14:41:07,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1077, PETRI_PLACES=83, PETRI_TRANSITIONS=103} [2024-02-07 14:41:07,818 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 32 predicate places. [2024-02-07 14:41:07,818 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 103 transitions, 1077 flow [2024-02-07 14:41:07,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:07,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:41:07,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:41:07,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-07 14:41:07,820 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:41:07,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:41:07,820 INFO L85 PathProgramCache]: Analyzing trace with hash 894608354, now seen corresponding path program 1 times [2024-02-07 14:41:07,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:41:07,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426107387] [2024-02-07 14:41:07,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:41:07,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:41:07,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:41:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:07,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:41:07,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426107387] [2024-02-07 14:41:07,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426107387] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:41:07,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641697181] [2024-02-07 14:41:07,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:41:07,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:41:07,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:41:07,977 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 14:41:07,978 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 14:41:08,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:41:08,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:41:08,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:41:08,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:08,222 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 14:41:08,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641697181] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:41:08,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 14:41:08,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-02-07 14:41:08,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718692865] [2024-02-07 14:41:08,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:41:08,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:41:08,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:41:08,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:41:08,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:41:08,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 14:41:08,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 103 transitions, 1077 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 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 14:41:08,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:41:08,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 14:41:08,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand