./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/protection/popl20-more-dec-subseq.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c ./goblint.2024-05-07_14-17-48.files/protection/popl20-more-dec-subseq.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-wip.fs.witness-ghost-b44c828-m [2024-05-12 12:53:34,303 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 12:53:34,372 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 12:53:34,376 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 12:53:34,377 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 12:53:34,401 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 12:53:34,401 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 12:53:34,402 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 12:53:34,402 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 12:53:34,405 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 12:53:34,405 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 12:53:34,405 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 12:53:34,406 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 12:53:34,407 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 12:53:34,407 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 12:53:34,407 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 12:53:34,407 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 12:53:34,408 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 12:53:34,408 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 12:53:34,408 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 12:53:34,409 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 12:53:34,409 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 12:53:34,410 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 12:53:34,410 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 12:53:34,410 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 12:53:34,410 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 12:53:34,410 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 12:53:34,410 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 12:53:34,411 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 12:53:34,411 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 12:53:34,412 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 12:53:34,412 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 12:53:34,412 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:53:34,413 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 12:53:34,413 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 12:53:34,413 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 12:53:34,413 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 12:53:34,413 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 12:53:34,413 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 12:53:34,413 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 12:53:34,414 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 12:53:34,414 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 12:53:34,414 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 12:53:34,414 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 12:53:34,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 12:53:34,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 12:53:34,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 12:53:34,682 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 12:53:34,683 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 12:53:34,683 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c [2024-05-12 12:53:35,841 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 12:53:36,060 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 12:53:36,061 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c [2024-05-12 12:53:36,070 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3d23377f/867dda8ffed0455faab0b2d7815dbaa9/FLAG3eaedd7a1 [2024-05-12 12:53:36,083 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3d23377f/867dda8ffed0455faab0b2d7815dbaa9 [2024-05-12 12:53:36,085 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 12:53:36,086 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 12:53:36,089 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/popl20-more-dec-subseq.wvr.yml/witness.yml [2024-05-12 12:53:36,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 12:53:36,161 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 12:53:36,162 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 12:53:36,162 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 12:53:36,167 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 12:53:36,168 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:53:36" (1/2) ... [2024-05-12 12:53:36,169 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f26421f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:53:36, skipping insertion in model container [2024-05-12 12:53:36,169 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:53:36" (1/2) ... [2024-05-12 12:53:36,171 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7dc7e422 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:53:36, skipping insertion in model container [2024-05-12 12:53:36,171 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:53:36" (2/2) ... [2024-05-12 12:53:36,173 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f26421f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:36, skipping insertion in model container [2024-05-12 12:53:36,173 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:53:36" (2/2) ... [2024-05-12 12:53:36,173 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 12:53:36,192 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 12:53:36,195 INFO L97 edCorrectnessWitness]: Location invariant before [L102-L102] ! multithreaded || 0 <= i [2024-05-12 12:53:36,196 INFO L97 edCorrectnessWitness]: Location invariant before [L103-L103] ! multithreaded || 0 <= i [2024-05-12 12:53:36,196 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 12:53:36,196 INFO L106 edCorrectnessWitness]: ghost_update [L101-L101] multithreaded = 1; [2024-05-12 12:53:36,214 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 12:53:36,390 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2024-05-12 12:53:36,397 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:53:36,404 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 12:53:36,454 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2024-05-12 12:53:36,469 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:53:36,483 INFO L206 MainTranslator]: Completed translation [2024-05-12 12:53:36,483 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:36 WrapperNode [2024-05-12 12:53:36,483 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 12:53:36,484 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 12:53:36,484 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 12:53:36,484 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 12:53:36,490 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:36" (1/1) ... [2024-05-12 12:53:36,506 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:36" (1/1) ... [2024-05-12 12:53:36,541 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 202 [2024-05-12 12:53:36,542 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 12:53:36,543 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 12:53:36,543 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 12:53:36,543 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 12:53:36,552 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:36" (1/1) ... [2024-05-12 12:53:36,552 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:36" (1/1) ... [2024-05-12 12:53:36,566 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:36" (1/1) ... [2024-05-12 12:53:36,584 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 2, 8, 2]. 57 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 4 writes are split as follows [0, 1, 2, 1]. [2024-05-12 12:53:36,588 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:36" (1/1) ... [2024-05-12 12:53:36,588 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:36" (1/1) ... [2024-05-12 12:53:36,600 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:36" (1/1) ... [2024-05-12 12:53:36,615 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:36" (1/1) ... [2024-05-12 12:53:36,617 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:36" (1/1) ... [2024-05-12 12:53:36,618 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:36" (1/1) ... [2024-05-12 12:53:36,623 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 12:53:36,623 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 12:53:36,626 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 12:53:36,626 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 12:53:36,627 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:36" (1/1) ... [2024-05-12 12:53:36,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:53:36,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:53:36,667 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) [2024-05-12 12:53:36,707 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 [2024-05-12 12:53:36,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 12:53:36,770 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-05-12 12:53:36,774 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-05-12 12:53:36,774 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-05-12 12:53:36,774 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-05-12 12:53:36,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 12:53:36,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 12:53:36,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 12:53:36,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 12:53:36,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 12:53:36,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 12:53:36,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 12:53:36,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 12:53:36,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 12:53:36,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 12:53:36,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 12:53:36,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-05-12 12:53:36,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 12:53:36,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 12:53:36,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-05-12 12:53:36,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-05-12 12:53:36,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-05-12 12:53:36,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-05-12 12:53:36,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 12:53:36,780 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 12:53:36,880 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 12:53:36,883 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 12:53:37,175 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 12:53:37,175 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 12:53:37,444 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 12:53:37,460 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-05-12 12:53:37,460 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:53:37 BoogieIcfgContainer [2024-05-12 12:53:37,461 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 12:53:37,462 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 12:53:37,462 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 12:53:37,465 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 12:53:37,465 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 12:53:36" (1/4) ... [2024-05-12 12:53:37,466 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a250b03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 12:53:37, skipping insertion in model container [2024-05-12 12:53:37,466 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:53:36" (2/4) ... [2024-05-12 12:53:37,466 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a250b03 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 12:53:37, skipping insertion in model container [2024-05-12 12:53:37,466 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:36" (3/4) ... [2024-05-12 12:53:37,466 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a250b03 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 12:53:37, skipping insertion in model container [2024-05-12 12:53:37,467 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:53:37" (4/4) ... [2024-05-12 12:53:37,468 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2024-05-12 12:53:37,484 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 12:53:37,485 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-05-12 12:53:37,485 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 12:53:37,527 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-05-12 12:53:37,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 36 transitions, 86 flow [2024-05-12 12:53:37,592 INFO L124 PetriNetUnfolderBase]: 5/34 cut-off events. [2024-05-12 12:53:37,593 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-05-12 12:53:37,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 34 events. 5/34 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 39 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2024-05-12 12:53:37,596 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 36 transitions, 86 flow [2024-05-12 12:53:37,600 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 33 transitions, 78 flow [2024-05-12 12:53:37,613 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 12:53:37,624 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;@17eb5908, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 12:53:37,625 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-05-12 12:53:37,668 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 12:53:37,668 INFO L124 PetriNetUnfolderBase]: 3/14 cut-off events. [2024-05-12 12:53:37,669 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 12:53:37,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:37,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:37,670 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:53:37,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:37,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1673513047, now seen corresponding path program 1 times [2024-05-12 12:53:37,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:37,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992703350] [2024-05-12 12:53:37,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:37,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:37,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:37,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:53:37,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:37,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992703350] [2024-05-12 12:53:37,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992703350] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:37,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:37,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 12:53:37,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931219366] [2024-05-12 12:53:37,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:37,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 12:53:37,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:37,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 12:53:37,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 12:53:37,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 36 [2024-05-12 12:53:37,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:37,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:37,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 36 [2024-05-12 12:53:37,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:38,157 INFO L124 PetriNetUnfolderBase]: 413/688 cut-off events. [2024-05-12 12:53:38,158 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-05-12 12:53:38,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1371 conditions, 688 events. 413/688 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3070 event pairs, 137 based on Foata normal form. 0/568 useless extension candidates. Maximal degree in co-relation 1255. Up to 380 conditions per place. [2024-05-12 12:53:38,166 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 46 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2024-05-12 12:53:38,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 52 transitions, 221 flow [2024-05-12 12:53:38,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 12:53:38,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 12:53:38,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-05-12 12:53:38,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-05-12 12:53:38,178 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 78 flow. Second operand 3 states and 68 transitions. [2024-05-12 12:53:38,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 52 transitions, 221 flow [2024-05-12 12:53:38,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 52 transitions, 207 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 12:53:38,184 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 84 flow [2024-05-12 12:53:38,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2024-05-12 12:53:38,190 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -1 predicate places. [2024-05-12 12:53:38,190 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 84 flow [2024-05-12 12:53:38,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:38,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:38,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:38,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 12:53:38,191 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:53:38,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:38,192 INFO L85 PathProgramCache]: Analyzing trace with hash -352018978, now seen corresponding path program 1 times [2024-05-12 12:53:38,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:38,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200446069] [2024-05-12 12:53:38,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:38,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:38,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:53:38,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:38,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200446069] [2024-05-12 12:53:38,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200446069] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:38,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:38,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:53:38,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952939101] [2024-05-12 12:53:38,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:38,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:53:38,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:38,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:53:38,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:53:38,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 36 [2024-05-12 12:53:38,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 34 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 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) [2024-05-12 12:53:38,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:38,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 36 [2024-05-12 12:53:38,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:38,465 INFO L124 PetriNetUnfolderBase]: 348/593 cut-off events. [2024-05-12 12:53:38,466 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2024-05-12 12:53:38,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1204 conditions, 593 events. 348/593 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2628 event pairs, 112 based on Foata normal form. 30/544 useless extension candidates. Maximal degree in co-relation 577. Up to 284 conditions per place. [2024-05-12 12:53:38,470 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 44 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2024-05-12 12:53:38,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 50 transitions, 207 flow [2024-05-12 12:53:38,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:53:38,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:53:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2024-05-12 12:53:38,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-05-12 12:53:38,474 INFO L175 Difference]: Start difference. First operand has 34 places, 34 transitions, 84 flow. Second operand 4 states and 72 transitions. [2024-05-12 12:53:38,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 50 transitions, 207 flow [2024-05-12 12:53:38,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 50 transitions, 205 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 12:53:38,476 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 78 flow [2024-05-12 12:53:38,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2024-05-12 12:53:38,477 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -1 predicate places. [2024-05-12 12:53:38,477 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 78 flow [2024-05-12 12:53:38,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 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) [2024-05-12 12:53:38,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:38,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:38,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 12:53:38,478 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:53:38,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:38,478 INFO L85 PathProgramCache]: Analyzing trace with hash 196141451, now seen corresponding path program 1 times [2024-05-12 12:53:38,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:38,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252397642] [2024-05-12 12:53:38,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:38,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:38,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:53:38,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:38,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252397642] [2024-05-12 12:53:38,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252397642] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:38,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:38,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:53:38,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540159941] [2024-05-12 12:53:38,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:38,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:53:38,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:38,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:53:38,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:53:38,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 36 [2024-05-12 12:53:38,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:38,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:38,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 36 [2024-05-12 12:53:38,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:38,665 INFO L124 PetriNetUnfolderBase]: 313/524 cut-off events. [2024-05-12 12:53:38,665 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-05-12 12:53:38,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1076 conditions, 524 events. 313/524 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2203 event pairs, 86 based on Foata normal form. 0/466 useless extension candidates. Maximal degree in co-relation 448. Up to 201 conditions per place. [2024-05-12 12:53:38,668 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 44 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2024-05-12 12:53:38,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 53 transitions, 220 flow [2024-05-12 12:53:38,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:53:38,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:53:38,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-05-12 12:53:38,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-05-12 12:53:38,670 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 78 flow. Second operand 5 states and 80 transitions. [2024-05-12 12:53:38,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 53 transitions, 220 flow [2024-05-12 12:53:38,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 53 transitions, 217 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 12:53:38,671 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 97 flow [2024-05-12 12:53:38,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=97, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2024-05-12 12:53:38,672 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2024-05-12 12:53:38,672 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 97 flow [2024-05-12 12:53:38,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:38,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:38,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:38,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 12:53:38,673 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:53:38,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:38,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1694640782, now seen corresponding path program 1 times [2024-05-12 12:53:38,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:38,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249010710] [2024-05-12 12:53:38,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:38,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:53:38,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:38,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249010710] [2024-05-12 12:53:38,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249010710] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:38,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:38,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:53:38,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798671984] [2024-05-12 12:53:38,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:38,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 12:53:38,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:38,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 12:53:38,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 12:53:38,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-05-12 12:53:38,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:38,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:38,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-05-12 12:53:38,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:38,813 INFO L124 PetriNetUnfolderBase]: 325/573 cut-off events. [2024-05-12 12:53:38,814 INFO L125 PetriNetUnfolderBase]: For 179/179 co-relation queries the response was YES. [2024-05-12 12:53:38,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1246 conditions, 573 events. 325/573 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2514 event pairs, 212 based on Foata normal form. 1/530 useless extension candidates. Maximal degree in co-relation 466. Up to 502 conditions per place. [2024-05-12 12:53:38,817 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 28 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2024-05-12 12:53:38,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 159 flow [2024-05-12 12:53:38,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 12:53:38,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 12:53:38,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-05-12 12:53:38,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49074074074074076 [2024-05-12 12:53:38,818 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 97 flow. Second operand 3 states and 53 transitions. [2024-05-12 12:53:38,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 159 flow [2024-05-12 12:53:38,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 34 transitions, 151 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-05-12 12:53:38,820 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 101 flow [2024-05-12 12:53:38,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-05-12 12:53:38,821 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2024-05-12 12:53:38,821 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 101 flow [2024-05-12 12:53:38,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:38,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:38,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:38,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 12:53:38,822 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:53:38,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:38,822 INFO L85 PathProgramCache]: Analyzing trace with hash -209046056, now seen corresponding path program 1 times [2024-05-12 12:53:38,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:38,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40830581] [2024-05-12 12:53:38,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:38,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 12:53:38,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:38,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40830581] [2024-05-12 12:53:38,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40830581] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:38,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:38,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:53:38,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563139082] [2024-05-12 12:53:38,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:38,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 12:53:38,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:38,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 12:53:38,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 12:53:38,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-05-12 12:53:38,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:38,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:38,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-05-12 12:53:38,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:38,972 INFO L124 PetriNetUnfolderBase]: 420/751 cut-off events. [2024-05-12 12:53:38,972 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-05-12 12:53:38,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1616 conditions, 751 events. 420/751 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3438 event pairs, 158 based on Foata normal form. 1/698 useless extension candidates. Maximal degree in co-relation 1598. Up to 341 conditions per place. [2024-05-12 12:53:38,975 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 43 selfloop transitions, 2 changer transitions 2/51 dead transitions. [2024-05-12 12:53:38,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 246 flow [2024-05-12 12:53:38,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 12:53:38,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 12:53:38,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-05-12 12:53:38,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6203703703703703 [2024-05-12 12:53:38,976 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 101 flow. Second operand 3 states and 67 transitions. [2024-05-12 12:53:38,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 246 flow [2024-05-12 12:53:38,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 51 transitions, 242 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-05-12 12:53:38,978 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 109 flow [2024-05-12 12:53:38,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2024-05-12 12:53:38,979 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2024-05-12 12:53:38,979 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 109 flow [2024-05-12 12:53:38,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:38,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:38,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:38,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 12:53:38,980 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:53:38,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:38,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1505803745, now seen corresponding path program 1 times [2024-05-12 12:53:38,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:38,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949193705] [2024-05-12 12:53:38,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:38,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:39,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:53:39,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:39,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949193705] [2024-05-12 12:53:39,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949193705] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:39,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:39,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:53:39,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547206124] [2024-05-12 12:53:39,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:39,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 12:53:39,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:39,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 12:53:39,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 12:53:39,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-05-12 12:53:39,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:39,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:39,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-05-12 12:53:39,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:39,112 INFO L124 PetriNetUnfolderBase]: 410/742 cut-off events. [2024-05-12 12:53:39,112 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2024-05-12 12:53:39,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1756 conditions, 742 events. 410/742 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3332 event pairs, 164 based on Foata normal form. 21/720 useless extension candidates. Maximal degree in co-relation 1731. Up to 499 conditions per place. [2024-05-12 12:53:39,115 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 40 selfloop transitions, 2 changer transitions 5/51 dead transitions. [2024-05-12 12:53:39,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 51 transitions, 251 flow [2024-05-12 12:53:39,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 12:53:39,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 12:53:39,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-05-12 12:53:39,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6203703703703703 [2024-05-12 12:53:39,117 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 109 flow. Second operand 3 states and 67 transitions. [2024-05-12 12:53:39,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 51 transitions, 251 flow [2024-05-12 12:53:39,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 51 transitions, 249 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 12:53:39,119 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 119 flow [2024-05-12 12:53:39,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2024-05-12 12:53:39,120 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 7 predicate places. [2024-05-12 12:53:39,120 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 119 flow [2024-05-12 12:53:39,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:39,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:39,120 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] [2024-05-12 12:53:39,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 12:53:39,121 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:53:39,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:39,121 INFO L85 PathProgramCache]: Analyzing trace with hash -482713284, now seen corresponding path program 1 times [2024-05-12 12:53:39,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:39,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738879497] [2024-05-12 12:53:39,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:39,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:39,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 12:53:39,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:39,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738879497] [2024-05-12 12:53:39,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738879497] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:39,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:39,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:53:39,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076331479] [2024-05-12 12:53:39,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:39,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:53:39,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:39,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:53:39,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:53:39,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-05-12 12:53:39,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 119 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:39,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:39,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-05-12 12:53:39,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:39,373 INFO L124 PetriNetUnfolderBase]: 504/938 cut-off events. [2024-05-12 12:53:39,374 INFO L125 PetriNetUnfolderBase]: For 318/320 co-relation queries the response was YES. [2024-05-12 12:53:39,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2309 conditions, 938 events. 504/938 cut-off events. For 318/320 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4577 event pairs, 415 based on Foata normal form. 18/896 useless extension candidates. Maximal degree in co-relation 1816. Up to 686 conditions per place. [2024-05-12 12:53:39,377 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 31 selfloop transitions, 2 changer transitions 23/60 dead transitions. [2024-05-12 12:53:39,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 60 transitions, 306 flow [2024-05-12 12:53:39,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:53:39,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:53:39,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-05-12 12:53:39,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49444444444444446 [2024-05-12 12:53:39,378 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 119 flow. Second operand 5 states and 89 transitions. [2024-05-12 12:53:39,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 60 transitions, 306 flow [2024-05-12 12:53:39,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 60 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 12:53:39,383 INFO L231 Difference]: Finished difference. Result has 48 places, 37 transitions, 133 flow [2024-05-12 12:53:39,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=133, PETRI_PLACES=48, PETRI_TRANSITIONS=37} [2024-05-12 12:53:39,383 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 13 predicate places. [2024-05-12 12:53:39,384 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 37 transitions, 133 flow [2024-05-12 12:53:39,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:39,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:39,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:39,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 12:53:39,384 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:53:39,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:39,385 INFO L85 PathProgramCache]: Analyzing trace with hash -645975292, now seen corresponding path program 1 times [2024-05-12 12:53:39,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:39,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437425527] [2024-05-12 12:53:39,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:39,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:40,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:53:40,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:40,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437425527] [2024-05-12 12:53:40,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437425527] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:53:40,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444877391] [2024-05-12 12:53:40,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:40,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:53:40,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:53:40,199 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) [2024-05-12 12:53:40,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-05-12 12:53:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:40,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 38 conjunts are in the unsatisfiable core [2024-05-12 12:53:40,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:53:40,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-05-12 12:53:40,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:53:40,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-05-12 12:53:40,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:53:40,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-05-12 12:53:40,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:53:40,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-05-12 12:53:40,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:53:40,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-05-12 12:53:40,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:53:40,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-05-12 12:53:40,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-05-12 12:53:40,442 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-05-12 12:53:40,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-05-12 12:53:40,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-05-12 12:53:40,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2024-05-12 12:53:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:53:40,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:53:41,446 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-05-12 12:53:41,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 56 [2024-05-12 12:53:41,456 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-05-12 12:53:41,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 77 [2024-05-12 12:53:41,500 INFO L349 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2024-05-12 12:53:41,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 66 [2024-05-12 12:53:41,545 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-05-12 12:53:41,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2024-05-12 12:53:41,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2024-05-12 12:53:41,556 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-05-12 12:53:41,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2024-05-12 12:53:41,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:53:41,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444877391] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:53:41,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:53:41,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 31 [2024-05-12 12:53:41,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844101741] [2024-05-12 12:53:41,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:53:41,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-05-12 12:53:41,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:41,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-05-12 12:53:41,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=810, Unknown=3, NotChecked=0, Total=992 [2024-05-12 12:53:41,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 36 [2024-05-12 12:53:41,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 37 transitions, 133 flow. Second operand has 32 states, 32 states have (on average 7.53125) internal successors, (241), 32 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:41,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:41,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 36 [2024-05-12 12:53:41,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:47,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-05-12 12:53:54,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-05-12 12:53:58,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-05-12 12:54:10,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-05-12 12:54:11,745 INFO L124 PetriNetUnfolderBase]: 2792/4519 cut-off events. [2024-05-12 12:54:11,745 INFO L125 PetriNetUnfolderBase]: For 1566/1566 co-relation queries the response was YES. [2024-05-12 12:54:11,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11384 conditions, 4519 events. 2792/4519 cut-off events. For 1566/1566 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 24427 event pairs, 483 based on Foata normal form. 3/3990 useless extension candidates. Maximal degree in co-relation 11363. Up to 664 conditions per place. [2024-05-12 12:54:11,765 INFO L140 encePairwiseOnDemand]: 20/36 looper letters, 314 selfloop transitions, 86 changer transitions 111/512 dead transitions. [2024-05-12 12:54:11,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 512 transitions, 2638 flow [2024-05-12 12:54:11,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-05-12 12:54:11,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2024-05-12 12:54:11,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 745 transitions. [2024-05-12 12:54:11,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39797008547008544 [2024-05-12 12:54:11,770 INFO L175 Difference]: Start difference. First operand has 48 places, 37 transitions, 133 flow. Second operand 52 states and 745 transitions. [2024-05-12 12:54:11,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 512 transitions, 2638 flow [2024-05-12 12:54:11,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 512 transitions, 2614 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-05-12 12:54:11,779 INFO L231 Difference]: Finished difference. Result has 127 places, 121 transitions, 883 flow [2024-05-12 12:54:11,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=883, PETRI_PLACES=127, PETRI_TRANSITIONS=121} [2024-05-12 12:54:11,779 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 92 predicate places. [2024-05-12 12:54:11,779 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 121 transitions, 883 flow [2024-05-12 12:54:11,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 7.53125) internal successors, (241), 32 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:54:11,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:54:11,780 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:54:11,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-05-12 12:54:11,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:54:11,993 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:54:11,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:54:11,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1700427014, now seen corresponding path program 2 times [2024-05-12 12:54:11,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:54:11,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326009517] [2024-05-12 12:54:11,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:54:11,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:54:12,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:54:13,264 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:54:13,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:54:13,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326009517] [2024-05-12 12:54:13,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326009517] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:54:13,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305321014] [2024-05-12 12:54:13,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 12:54:13,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:54:13,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:54:13,268 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 12:54:13,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-05-12 12:54:13,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 12:54:13,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:54:13,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 32 conjunts are in the unsatisfiable core [2024-05-12 12:54:13,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:54:13,853 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2024-05-12 12:54:13,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2024-05-12 12:54:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 12:54:13,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:54:18,294 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-05-12 12:54:18,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 174 [2024-05-12 12:54:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-05-12 12:54:18,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305321014] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:54:18,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:54:18,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 7] total 30 [2024-05-12 12:54:18,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986239239] [2024-05-12 12:54:18,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:54:18,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-05-12 12:54:18,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:54:18,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-05-12 12:54:18,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=761, Unknown=1, NotChecked=0, Total=930 [2024-05-12 12:54:18,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 36 [2024-05-12 12:54:18,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 121 transitions, 883 flow. Second operand has 31 states, 31 states have (on average 5.935483870967742) internal successors, (184), 31 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:54:18,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:54:18,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 36 [2024-05-12 12:54:18,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:54:21,084 INFO L124 PetriNetUnfolderBase]: 3361/5435 cut-off events. [2024-05-12 12:54:21,085 INFO L125 PetriNetUnfolderBase]: For 34705/34705 co-relation queries the response was YES. [2024-05-12 12:54:21,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25314 conditions, 5435 events. 3361/5435 cut-off events. For 34705/34705 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 30048 event pairs, 133 based on Foata normal form. 1/5196 useless extension candidates. Maximal degree in co-relation 25265. Up to 1400 conditions per place. [2024-05-12 12:54:21,140 INFO L140 encePairwiseOnDemand]: 21/36 looper letters, 200 selfloop transitions, 96 changer transitions 17/314 dead transitions. [2024-05-12 12:54:21,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 314 transitions, 2969 flow [2024-05-12 12:54:21,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-05-12 12:54:21,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-05-12 12:54:21,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 282 transitions. [2024-05-12 12:54:21,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30128205128205127 [2024-05-12 12:54:21,145 INFO L175 Difference]: Start difference. First operand has 127 places, 121 transitions, 883 flow. Second operand 26 states and 282 transitions. [2024-05-12 12:54:21,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 314 transitions, 2969 flow [2024-05-12 12:54:21,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 314 transitions, 2715 flow, removed 125 selfloop flow, removed 9 redundant places. [2024-05-12 12:54:21,319 INFO L231 Difference]: Finished difference. Result has 142 places, 167 transitions, 1442 flow [2024-05-12 12:54:21,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1442, PETRI_PLACES=142, PETRI_TRANSITIONS=167} [2024-05-12 12:54:21,322 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 107 predicate places. [2024-05-12 12:54:21,323 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 167 transitions, 1442 flow [2024-05-12 12:54:21,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.935483870967742) internal successors, (184), 31 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:54:21,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:54:21,323 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:54:21,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-05-12 12:54:21,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-05-12 12:54:21,534 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:54:21,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:54:21,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1492855385, now seen corresponding path program 3 times [2024-05-12 12:54:21,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:54:21,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486492360] [2024-05-12 12:54:21,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:54:21,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:54:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:54:21,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 12:54:21,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:54:21,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486492360] [2024-05-12 12:54:21,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486492360] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:54:21,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864023457] [2024-05-12 12:54:21,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-05-12 12:54:21,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:54:21,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:54:21,646 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 12:54:21,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-05-12 12:54:21,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-05-12 12:54:21,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:54:21,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 8 conjunts are in the unsatisfiable core [2024-05-12 12:54:21,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:54:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 12:54:21,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:54:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 12:54:21,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864023457] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:54:21,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:54:21,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 10 [2024-05-12 12:54:21,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359646086] [2024-05-12 12:54:21,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:54:21,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 12:54:21,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:54:21,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 12:54:21,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-05-12 12:54:21,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-05-12 12:54:21,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 167 transitions, 1442 flow. Second operand has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:54:21,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:54:21,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-05-12 12:54:21,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:54:22,772 INFO L124 PetriNetUnfolderBase]: 2549/4788 cut-off events. [2024-05-12 12:54:22,773 INFO L125 PetriNetUnfolderBase]: For 37730/37776 co-relation queries the response was YES. [2024-05-12 12:54:22,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23139 conditions, 4788 events. 2549/4788 cut-off events. For 37730/37776 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 30483 event pairs, 528 based on Foata normal form. 150/4847 useless extension candidates. Maximal degree in co-relation 23083. Up to 1195 conditions per place. [2024-05-12 12:54:22,804 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 113 selfloop transitions, 22 changer transitions 120/260 dead transitions. [2024-05-12 12:54:22,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 260 transitions, 2635 flow [2024-05-12 12:54:22,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 12:54:22,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 12:54:22,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-05-12 12:54:22,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5808080808080808 [2024-05-12 12:54:22,807 INFO L175 Difference]: Start difference. First operand has 142 places, 167 transitions, 1442 flow. Second operand 11 states and 230 transitions. [2024-05-12 12:54:22,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 260 transitions, 2635 flow [2024-05-12 12:54:22,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 260 transitions, 2298 flow, removed 129 selfloop flow, removed 14 redundant places. [2024-05-12 12:54:22,867 INFO L231 Difference]: Finished difference. Result has 132 places, 98 transitions, 835 flow [2024-05-12 12:54:22,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1072, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=835, PETRI_PLACES=132, PETRI_TRANSITIONS=98} [2024-05-12 12:54:22,869 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 97 predicate places. [2024-05-12 12:54:22,869 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 98 transitions, 835 flow [2024-05-12 12:54:22,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:54:22,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:54:22,870 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:54:22,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-05-12 12:54:23,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:54:23,091 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:54:23,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:54:23,092 INFO L85 PathProgramCache]: Analyzing trace with hash -50775053, now seen corresponding path program 4 times [2024-05-12 12:54:23,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:54:23,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940519769] [2024-05-12 12:54:23,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:54:23,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:54:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:54:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-05-12 12:54:23,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:54:23,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940519769] [2024-05-12 12:54:23,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940519769] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:54:23,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026002756] [2024-05-12 12:54:23,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-05-12 12:54:23,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:54:23,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:54:23,308 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 12:54:23,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-05-12 12:54:23,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-05-12 12:54:23,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:54:23,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 8 conjunts are in the unsatisfiable core [2024-05-12 12:54:23,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:54:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-05-12 12:54:23,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:54:23,577 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-05-12 12:54:23,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026002756] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:54:23,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:54:23,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-05-12 12:54:23,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466889977] [2024-05-12 12:54:23,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:54:23,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-05-12 12:54:23,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:54:23,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-05-12 12:54:23,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-05-12 12:54:23,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 36 [2024-05-12 12:54:23,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 98 transitions, 835 flow. Second operand has 15 states, 15 states have (on average 10.133333333333333) internal successors, (152), 15 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:54:23,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:54:23,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 36 [2024-05-12 12:54:23,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:54:24,178 INFO L124 PetriNetUnfolderBase]: 2051/3899 cut-off events. [2024-05-12 12:54:24,178 INFO L125 PetriNetUnfolderBase]: For 23701/23758 co-relation queries the response was YES. [2024-05-12 12:54:24,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17527 conditions, 3899 events. 2051/3899 cut-off events. For 23701/23758 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 23745 event pairs, 528 based on Foata normal form. 49/3870 useless extension candidates. Maximal degree in co-relation 16221. Up to 2188 conditions per place. [2024-05-12 12:54:24,202 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 107 selfloop transitions, 15 changer transitions 50/177 dead transitions. [2024-05-12 12:54:24,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 177 transitions, 1788 flow [2024-05-12 12:54:24,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:54:24,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:54:24,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-05-12 12:54:24,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-05-12 12:54:24,204 INFO L175 Difference]: Start difference. First operand has 132 places, 98 transitions, 835 flow. Second operand 9 states and 132 transitions. [2024-05-12 12:54:24,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 177 transitions, 1788 flow [2024-05-12 12:54:24,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 177 transitions, 1624 flow, removed 80 selfloop flow, removed 17 redundant places. [2024-05-12 12:54:24,238 INFO L231 Difference]: Finished difference. Result has 99 places, 95 transitions, 738 flow [2024-05-12 12:54:24,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=738, PETRI_PLACES=99, PETRI_TRANSITIONS=95} [2024-05-12 12:54:24,239 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 64 predicate places. [2024-05-12 12:54:24,239 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 95 transitions, 738 flow [2024-05-12 12:54:24,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.133333333333333) internal successors, (152), 15 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:54:24,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:54:24,240 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:54:24,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-05-12 12:54:24,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:54:24,452 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:54:24,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:54:24,452 INFO L85 PathProgramCache]: Analyzing trace with hash -428405473, now seen corresponding path program 5 times [2024-05-12 12:54:24,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:54:24,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181502759] [2024-05-12 12:54:24,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:54:24,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:54:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:54:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 12:54:25,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:54:25,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181502759] [2024-05-12 12:54:25,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181502759] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:54:25,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121450545] [2024-05-12 12:54:25,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-05-12 12:54:25,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:54:25,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:54:25,673 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 12:54:25,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-05-12 12:54:25,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-05-12 12:54:25,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:54:25,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 41 conjunts are in the unsatisfiable core [2024-05-12 12:54:25,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:54:38,635 INFO L349 Elim1Store]: treesize reduction 41, result has 54.9 percent of original size [2024-05-12 12:54:38,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 65 [2024-05-12 12:54:38,701 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 12:54:38,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:54:40,714 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-05-12 12:54:40,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 237 treesize of output 1261 [2024-05-12 12:57:21,189 WARN L249 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-05-12 12:57:21,191 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-05-12 12:57:21,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2024-05-12 12:57:21,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-05-12 12:57:21,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-05-12 12:57:21,402 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:287) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:519) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:503) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:609) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:252) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:324) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:731) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:338) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:341) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:184) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:110) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 69 more [2024-05-12 12:57:21,416 INFO L158 Benchmark]: Toolchain (without parser) took 225245.67ms. Allocated memory was 142.6MB in the beginning and 2.1GB in the end (delta: 1.9GB). Free memory was 105.4MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. [2024-05-12 12:57:21,416 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 104.9MB. Free memory is still 74.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-05-12 12:57:21,416 INFO L158 Benchmark]: Witness Parser took 0.42ms. Allocated memory is still 142.6MB. Free memory is still 108.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-05-12 12:57:21,416 INFO L158 Benchmark]: CACSL2BoogieTranslator took 321.26ms. Allocated memory is still 142.6MB. Free memory was 105.4MB in the beginning and 89.9MB in the end (delta: 15.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-05-12 12:57:21,417 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.63ms. Allocated memory is still 142.6MB. Free memory was 89.9MB in the beginning and 87.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-05-12 12:57:21,417 INFO L158 Benchmark]: Boogie Preprocessor took 79.96ms. Allocated memory is still 142.6MB. Free memory was 87.7MB in the beginning and 85.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-05-12 12:57:21,417 INFO L158 Benchmark]: RCFGBuilder took 837.34ms. Allocated memory is still 142.6MB. Free memory was 85.3MB in the beginning and 53.1MB in the end (delta: 32.3MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2024-05-12 12:57:21,417 INFO L158 Benchmark]: TraceAbstraction took 223943.88ms. Allocated memory was 142.6MB in the beginning and 2.1GB in the end (delta: 1.9GB). Free memory was 51.8MB in the beginning and 1.3GB in the end (delta: -1.3GB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. [2024-05-12 12:57:21,418 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 104.9MB. Free memory is still 74.7MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.42ms. Allocated memory is still 142.6MB. Free memory is still 108.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 321.26ms. Allocated memory is still 142.6MB. Free memory was 105.4MB in the beginning and 89.9MB in the end (delta: 15.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.63ms. Allocated memory is still 142.6MB. Free memory was 89.9MB in the beginning and 87.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 79.96ms. Allocated memory is still 142.6MB. Free memory was 87.7MB in the beginning and 85.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 837.34ms. Allocated memory is still 142.6MB. Free memory was 85.3MB in the beginning and 53.1MB in the end (delta: 32.3MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * TraceAbstraction took 223943.88ms. Allocated memory was 142.6MB in the beginning and 2.1GB in the end (delta: 1.9GB). Free memory was 51.8MB in the beginning and 1.3GB in the end (delta: -1.3GB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c ./goblint.2024-05-07_14-17-48.files/protection/popl20-more-dec-subseq.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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-wip.fs.witness-ghost-b44c828-m [2024-05-12 12:57:23,385 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 12:57:23,475 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-05-12 12:57:23,478 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 12:57:23,478 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 12:57:23,499 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 12:57:23,500 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 12:57:23,500 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 12:57:23,500 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 12:57:23,504 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 12:57:23,504 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 12:57:23,504 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 12:57:23,505 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 12:57:23,506 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 12:57:23,506 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 12:57:23,506 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 12:57:23,506 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 12:57:23,507 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 12:57:23,507 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 12:57:23,507 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 12:57:23,507 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 12:57:23,508 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 12:57:23,508 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 12:57:23,509 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-05-12 12:57:23,509 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-05-12 12:57:23,509 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 12:57:23,509 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-05-12 12:57:23,509 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 12:57:23,510 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 12:57:23,510 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 12:57:23,511 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 12:57:23,511 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 12:57:23,511 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 12:57:23,511 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 12:57:23,511 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:57:23,512 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 12:57:23,512 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 12:57:23,512 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 12:57:23,513 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-05-12 12:57:23,513 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-05-12 12:57:23,513 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 12:57:23,513 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 12:57:23,513 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 12:57:23,514 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 12:57:23,514 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 12:57:23,514 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-05-12 12:57:23,514 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 12:57:23,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 12:57:23,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 12:57:23,812 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 12:57:23,813 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 12:57:23,814 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 12:57:23,815 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c [2024-05-12 12:57:24,949 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 12:57:25,140 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 12:57:25,140 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c [2024-05-12 12:57:25,148 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/622343315/17c16921313b4b1d967c965259154f55/FLAGc396d3e92 [2024-05-12 12:57:25,161 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/622343315/17c16921313b4b1d967c965259154f55 [2024-05-12 12:57:25,163 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 12:57:25,163 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 12:57:25,164 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/popl20-more-dec-subseq.wvr.yml/witness.yml [2024-05-12 12:57:25,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 12:57:25,251 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 12:57:25,253 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 12:57:25,253 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 12:57:25,257 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 12:57:25,257 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:57:25" (1/2) ... [2024-05-12 12:57:25,258 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@393fc928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:57:25, skipping insertion in model container [2024-05-12 12:57:25,258 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:57:25" (1/2) ... [2024-05-12 12:57:25,259 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@59963002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:57:25, skipping insertion in model container [2024-05-12 12:57:25,260 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:57:25" (2/2) ... [2024-05-12 12:57:25,261 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@393fc928 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:57:25, skipping insertion in model container [2024-05-12 12:57:25,261 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:57:25" (2/2) ... [2024-05-12 12:57:25,262 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 12:57:25,277 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 12:57:25,278 INFO L97 edCorrectnessWitness]: Location invariant before [L102-L102] ! multithreaded || 0 <= i [2024-05-12 12:57:25,278 INFO L97 edCorrectnessWitness]: Location invariant before [L103-L103] ! multithreaded || 0 <= i [2024-05-12 12:57:25,278 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 12:57:25,278 INFO L106 edCorrectnessWitness]: ghost_update [L101-L101] multithreaded = 1; [2024-05-12 12:57:25,297 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 12:57:25,464 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2024-05-12 12:57:25,476 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:57:25,487 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-05-12 12:57:25,492 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 12:57:25,509 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2024-05-12 12:57:25,515 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:57:25,520 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 12:57:25,582 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2024-05-12 12:57:25,588 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:57:25,601 INFO L206 MainTranslator]: Completed translation [2024-05-12 12:57:25,602 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:57:25 WrapperNode [2024-05-12 12:57:25,602 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 12:57:25,604 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 12:57:25,604 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 12:57:25,604 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 12:57:25,609 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:57:25" (1/1) ... [2024-05-12 12:57:25,626 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:57:25" (1/1) ... [2024-05-12 12:57:25,650 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 197 [2024-05-12 12:57:25,651 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 12:57:25,652 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 12:57:25,652 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 12:57:25,652 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 12:57:25,660 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:57:25" (1/1) ... [2024-05-12 12:57:25,660 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:57:25" (1/1) ... [2024-05-12 12:57:25,673 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:57:25" (1/1) ... [2024-05-12 12:57:25,701 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 2, 8, 2]. 57 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 4 writes are split as follows [0, 1, 2, 1]. [2024-05-12 12:57:25,701 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:57:25" (1/1) ... [2024-05-12 12:57:25,701 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:57:25" (1/1) ... [2024-05-12 12:57:25,707 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:57:25" (1/1) ... [2024-05-12 12:57:25,715 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:57:25" (1/1) ... [2024-05-12 12:57:25,716 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:57:25" (1/1) ... [2024-05-12 12:57:25,721 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:57:25" (1/1) ... [2024-05-12 12:57:25,723 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 12:57:25,725 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 12:57:25,725 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 12:57:25,725 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 12:57:25,726 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:57:25" (1/1) ... [2024-05-12 12:57:25,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:57:25,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:57:25,746 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) [2024-05-12 12:57:25,754 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 [2024-05-12 12:57:25,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 12:57:25,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-05-12 12:57:25,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-05-12 12:57:25,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-05-12 12:57:25,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2024-05-12 12:57:25,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 12:57:25,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-05-12 12:57:25,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-05-12 12:57:25,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2024-05-12 12:57:25,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2024-05-12 12:57:25,787 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-05-12 12:57:25,787 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-05-12 12:57:25,787 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-05-12 12:57:25,787 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-05-12 12:57:25,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 12:57:25,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 12:57:25,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-05-12 12:57:25,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 12:57:25,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 12:57:25,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 12:57:25,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-05-12 12:57:25,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-05-12 12:57:25,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2024-05-12 12:57:25,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2024-05-12 12:57:25,793 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 12:57:25,875 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 12:57:25,876 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 12:57:26,251 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 12:57:26,251 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 12:57:26,497 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 12:57:26,497 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-05-12 12:57:26,498 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:57:26 BoogieIcfgContainer [2024-05-12 12:57:26,498 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 12:57:26,499 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 12:57:26,499 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 12:57:26,501 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 12:57:26,502 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 12:57:25" (1/4) ... [2024-05-12 12:57:26,502 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c187145 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 12:57:26, skipping insertion in model container [2024-05-12 12:57:26,502 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:57:25" (2/4) ... [2024-05-12 12:57:26,504 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c187145 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 12:57:26, skipping insertion in model container [2024-05-12 12:57:26,504 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:57:25" (3/4) ... [2024-05-12 12:57:26,504 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c187145 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 12:57:26, skipping insertion in model container [2024-05-12 12:57:26,504 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:57:26" (4/4) ... [2024-05-12 12:57:26,505 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2024-05-12 12:57:26,517 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 12:57:26,518 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-05-12 12:57:26,518 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 12:57:26,567 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-05-12 12:57:26,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 36 transitions, 86 flow [2024-05-12 12:57:26,623 INFO L124 PetriNetUnfolderBase]: 5/34 cut-off events. [2024-05-12 12:57:26,623 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-05-12 12:57:26,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 34 events. 5/34 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 39 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2024-05-12 12:57:26,626 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 36 transitions, 86 flow [2024-05-12 12:57:26,629 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 33 transitions, 78 flow [2024-05-12 12:57:26,642 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 12:57:26,648 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;@7832c32c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 12:57:26,648 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-05-12 12:57:26,655 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 12:57:26,656 INFO L124 PetriNetUnfolderBase]: 3/14 cut-off events. [2024-05-12 12:57:26,656 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 12:57:26,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:57:26,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:57:26,657 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:57:26,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:57:26,661 INFO L85 PathProgramCache]: Analyzing trace with hash 844342103, now seen corresponding path program 1 times [2024-05-12 12:57:26,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-05-12 12:57:26,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441387577] [2024-05-12 12:57:26,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:57:26,675 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-05-12 12:57:26,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-05-12 12:57:26,685 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-05-12 12:57:26,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-05-12 12:57:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:57:26,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2024-05-12 12:57:26,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:57:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:57:26,821 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-05-12 12:57:26,821 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-05-12 12:57:26,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441387577] [2024-05-12 12:57:26,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441387577] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:57:26,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:57:26,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 12:57:26,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307571217] [2024-05-12 12:57:26,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:57:26,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 12:57:26,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-05-12 12:57:26,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 12:57:26,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 12:57:26,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 36 [2024-05-12 12:57:26,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:57:26,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:57:26,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 36 [2024-05-12 12:57:26,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:57:27,121 INFO L124 PetriNetUnfolderBase]: 413/688 cut-off events. [2024-05-12 12:57:27,122 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-05-12 12:57:27,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1371 conditions, 688 events. 413/688 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3070 event pairs, 137 based on Foata normal form. 0/568 useless extension candidates. Maximal degree in co-relation 1255. Up to 380 conditions per place. [2024-05-12 12:57:27,127 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 46 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2024-05-12 12:57:27,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 52 transitions, 221 flow [2024-05-12 12:57:27,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 12:57:27,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 12:57:27,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-05-12 12:57:27,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-05-12 12:57:27,137 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 78 flow. Second operand 3 states and 68 transitions. [2024-05-12 12:57:27,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 52 transitions, 221 flow [2024-05-12 12:57:27,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 52 transitions, 207 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 12:57:27,141 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 84 flow [2024-05-12 12:57:27,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2024-05-12 12:57:27,144 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -1 predicate places. [2024-05-12 12:57:27,145 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 84 flow [2024-05-12 12:57:27,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:57:27,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:57:27,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:57:27,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2024-05-12 12:57:27,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-05-12 12:57:27,349 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:57:27,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:57:27,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1826702316, now seen corresponding path program 1 times [2024-05-12 12:57:27,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-05-12 12:57:27,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145958091] [2024-05-12 12:57:27,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:57:27,351 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-05-12 12:57:27,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-05-12 12:57:27,352 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-05-12 12:57:27,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-05-12 12:57:27,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:57:27,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2024-05-12 12:57:27,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:57:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:57:27,523 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-05-12 12:57:27,523 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-05-12 12:57:27,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145958091] [2024-05-12 12:57:27,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [145958091] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:57:27,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:57:27,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:57:27,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836357903] [2024-05-12 12:57:27,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:57:27,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:57:27,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-05-12 12:57:27,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:57:27,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:57:27,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 36 [2024-05-12 12:57:27,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 34 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 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) [2024-05-12 12:57:27,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:57:27,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 36 [2024-05-12 12:57:27,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:57:27,710 INFO L124 PetriNetUnfolderBase]: 582/958 cut-off events. [2024-05-12 12:57:27,710 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2024-05-12 12:57:27,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1989 conditions, 958 events. 582/958 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4435 event pairs, 137 based on Foata normal form. 30/869 useless extension candidates. Maximal degree in co-relation 577. Up to 380 conditions per place. [2024-05-12 12:57:27,715 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 64 selfloop transitions, 3 changer transitions 0/71 dead transitions. [2024-05-12 12:57:27,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 71 transitions, 300 flow [2024-05-12 12:57:27,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:57:27,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:57:27,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-05-12 12:57:27,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-05-12 12:57:27,716 INFO L175 Difference]: Start difference. First operand has 34 places, 34 transitions, 84 flow. Second operand 4 states and 93 transitions. [2024-05-12 12:57:27,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 71 transitions, 300 flow [2024-05-12 12:57:27,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 71 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 12:57:27,718 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 100 flow [2024-05-12 12:57:27,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2024-05-12 12:57:27,719 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2024-05-12 12:57:27,719 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 100 flow [2024-05-12 12:57:27,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 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) [2024-05-12 12:57:27,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:57:27,720 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:57:27,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-05-12 12:57:27,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-05-12 12:57:27,942 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:57:27,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:57:27,943 INFO L85 PathProgramCache]: Analyzing trace with hash -2051895753, now seen corresponding path program 2 times [2024-05-12 12:57:27,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-05-12 12:57:27,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419861390] [2024-05-12 12:57:27,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 12:57:27,943 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-05-12 12:57:27,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-05-12 12:57:27,961 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-05-12 12:57:27,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-05-12 12:57:28,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-05-12 12:57:28,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:57:28,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2024-05-12 12:57:28,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:57:28,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 12:57:28,079 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-05-12 12:57:28,079 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-05-12 12:57:28,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419861390] [2024-05-12 12:57:28,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419861390] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:57:28,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:57:28,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:57:28,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083152541] [2024-05-12 12:57:28,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:57:28,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 12:57:28,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-05-12 12:57:28,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 12:57:28,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 12:57:28,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-05-12 12:57:28,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:57:28,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:57:28,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-05-12 12:57:28,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:57:28,255 INFO L124 PetriNetUnfolderBase]: 564/1007 cut-off events. [2024-05-12 12:57:28,255 INFO L125 PetriNetUnfolderBase]: For 152/162 co-relation queries the response was YES. [2024-05-12 12:57:28,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2043 conditions, 1007 events. 564/1007 cut-off events. For 152/162 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5060 event pairs, 370 based on Foata normal form. 0/887 useless extension candidates. Maximal degree in co-relation 583. Up to 881 conditions per place. [2024-05-12 12:57:28,259 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 28 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2024-05-12 12:57:28,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 36 transitions, 162 flow [2024-05-12 12:57:28,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 12:57:28,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 12:57:28,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-05-12 12:57:28,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49074074074074076 [2024-05-12 12:57:28,261 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 100 flow. Second operand 3 states and 53 transitions. [2024-05-12 12:57:28,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 36 transitions, 162 flow [2024-05-12 12:57:28,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 36 transitions, 156 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-05-12 12:57:28,263 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 106 flow [2024-05-12 12:57:28,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2024-05-12 12:57:28,263 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2024-05-12 12:57:28,264 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 106 flow [2024-05-12 12:57:28,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:57:28,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:57:28,264 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:57:28,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-05-12 12:57:28,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-05-12 12:57:28,468 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:57:28,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:57:28,468 INFO L85 PathProgramCache]: Analyzing trace with hash -737787593, now seen corresponding path program 1 times [2024-05-12 12:57:28,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-05-12 12:57:28,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147855435] [2024-05-12 12:57:28,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:57:28,469 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-05-12 12:57:28,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-05-12 12:57:28,470 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-05-12 12:57:28,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-05-12 12:57:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:57:28,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2024-05-12 12:57:28,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:57:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:57:28,577 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:57:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:57:28,624 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-05-12 12:57:28,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147855435] [2024-05-12 12:57:28,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147855435] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:57:28,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-05-12 12:57:28,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2024-05-12 12:57:28,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314634499] [2024-05-12 12:57:28,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-05-12 12:57:28,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:57:28,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-05-12 12:57:28,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:57:28,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:57:28,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 36 [2024-05-12 12:57:28,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 106 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:57:28,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:57:28,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 36 [2024-05-12 12:57:28,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:57:29,024 INFO L124 PetriNetUnfolderBase]: 913/1503 cut-off events. [2024-05-12 12:57:29,024 INFO L125 PetriNetUnfolderBase]: For 331/331 co-relation queries the response was YES. [2024-05-12 12:57:29,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3137 conditions, 1503 events. 913/1503 cut-off events. For 331/331 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 7082 event pairs, 112 based on Foata normal form. 100/1420 useless extension candidates. Maximal degree in co-relation 3119. Up to 284 conditions per place. [2024-05-12 12:57:29,030 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 111 selfloop transitions, 7 changer transitions 0/122 dead transitions. [2024-05-12 12:57:29,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 122 transitions, 529 flow [2024-05-12 12:57:29,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:57:29,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:57:29,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-05-12 12:57:29,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6006944444444444 [2024-05-12 12:57:29,037 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 106 flow. Second operand 8 states and 173 transitions. [2024-05-12 12:57:29,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 122 transitions, 529 flow [2024-05-12 12:57:29,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 122 transitions, 525 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-05-12 12:57:29,041 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 122 flow [2024-05-12 12:57:29,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=122, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2024-05-12 12:57:29,047 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 8 predicate places. [2024-05-12 12:57:29,047 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 122 flow [2024-05-12 12:57:29,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:57:29,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:57:29,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:57:29,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-05-12 12:57:29,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-05-12 12:57:29,251 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:57:29,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:57:29,251 INFO L85 PathProgramCache]: Analyzing trace with hash 886337985, now seen corresponding path program 1 times [2024-05-12 12:57:29,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-05-12 12:57:29,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999862756] [2024-05-12 12:57:29,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:57:29,252 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-05-12 12:57:29,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-05-12 12:57:29,266 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-05-12 12:57:29,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-05-12 12:57:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:57:29,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2024-05-12 12:57:29,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:57:29,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:57:29,393 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-05-12 12:57:29,393 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-05-12 12:57:29,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999862756] [2024-05-12 12:57:29,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1999862756] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:57:29,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:57:29,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:57:29,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902183259] [2024-05-12 12:57:29,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:57:29,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 12:57:29,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-05-12 12:57:29,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 12:57:29,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 12:57:29,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-05-12 12:57:29,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:57:29,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:57:29,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-05-12 12:57:29,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:57:29,609 INFO L124 PetriNetUnfolderBase]: 1236/2236 cut-off events. [2024-05-12 12:57:29,610 INFO L125 PetriNetUnfolderBase]: For 599/599 co-relation queries the response was YES. [2024-05-12 12:57:29,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4726 conditions, 2236 events. 1236/2236 cut-off events. For 599/599 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 12774 event pairs, 493 based on Foata normal form. 6/2123 useless extension candidates. Maximal degree in co-relation 4702. Up to 1006 conditions per place. [2024-05-12 12:57:29,617 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 49 selfloop transitions, 2 changer transitions 2/57 dead transitions. [2024-05-12 12:57:29,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 57 transitions, 304 flow [2024-05-12 12:57:29,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 12:57:29,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 12:57:29,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-05-12 12:57:29,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6203703703703703 [2024-05-12 12:57:29,618 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 122 flow. Second operand 3 states and 67 transitions. [2024-05-12 12:57:29,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 57 transitions, 304 flow [2024-05-12 12:57:29,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 57 transitions, 265 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-05-12 12:57:29,621 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 113 flow [2024-05-12 12:57:29,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2024-05-12 12:57:29,622 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 6 predicate places. [2024-05-12 12:57:29,622 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 113 flow [2024-05-12 12:57:29,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:57:29,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:57:29,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:57:29,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-05-12 12:57:29,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-05-12 12:57:29,826 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:57:29,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:57:29,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1324070984, now seen corresponding path program 1 times [2024-05-12 12:57:29,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-05-12 12:57:29,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407649112] [2024-05-12 12:57:29,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:57:29,827 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-05-12 12:57:29,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-05-12 12:57:29,828 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-05-12 12:57:29,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-05-12 12:57:29,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:57:29,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2024-05-12 12:57:29,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:57:29,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:57:29,962 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-05-12 12:57:29,962 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-05-12 12:57:29,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1407649112] [2024-05-12 12:57:29,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1407649112] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:57:29,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:57:29,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:57:29,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437165819] [2024-05-12 12:57:29,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:57:29,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:57:29,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-05-12 12:57:29,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:57:29,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:57:29,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 36 [2024-05-12 12:57:29,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 113 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:57:29,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:57:29,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 36 [2024-05-12 12:57:29,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:57:30,388 INFO L124 PetriNetUnfolderBase]: 2394/3933 cut-off events. [2024-05-12 12:57:30,388 INFO L125 PetriNetUnfolderBase]: For 418/418 co-relation queries the response was YES. [2024-05-12 12:57:30,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8758 conditions, 3933 events. 2394/3933 cut-off events. For 418/418 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 20491 event pairs, 699 based on Foata normal form. 93/3537 useless extension candidates. Maximal degree in co-relation 8735. Up to 2289 conditions per place. [2024-05-12 12:57:30,400 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 67 selfloop transitions, 3 changer transitions 31/102 dead transitions. [2024-05-12 12:57:30,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 102 transitions, 497 flow [2024-05-12 12:57:30,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:57:30,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:57:30,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-05-12 12:57:30,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-05-12 12:57:30,401 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 113 flow. Second operand 7 states and 117 transitions. [2024-05-12 12:57:30,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 102 transitions, 497 flow [2024-05-12 12:57:30,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 102 transitions, 495 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 12:57:30,404 INFO L231 Difference]: Finished difference. Result has 50 places, 39 transitions, 137 flow [2024-05-12 12:57:30,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=137, PETRI_PLACES=50, PETRI_TRANSITIONS=39} [2024-05-12 12:57:30,405 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 15 predicate places. [2024-05-12 12:57:30,405 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 39 transitions, 137 flow [2024-05-12 12:57:30,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:57:30,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:57:30,405 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] [2024-05-12 12:57:30,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2024-05-12 12:57:30,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-05-12 12:57:30,608 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:57:30,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:57:30,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1058722980, now seen corresponding path program 1 times [2024-05-12 12:57:30,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-05-12 12:57:30,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028309027] [2024-05-12 12:57:30,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:57:30,610 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-05-12 12:57:30,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-05-12 12:57:30,611 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-05-12 12:57:30,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-05-12 12:57:30,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:57:30,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2024-05-12 12:57:30,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:57:30,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:57:30,763 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-05-12 12:57:30,763 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-05-12 12:57:30,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028309027] [2024-05-12 12:57:30,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028309027] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:57:30,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:57:30,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:57:30,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879977714] [2024-05-12 12:57:30,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:57:30,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:57:30,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-05-12 12:57:30,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:57:30,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:57:30,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-05-12 12:57:30,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 39 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:57:30,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:57:30,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-05-12 12:57:30,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:57:31,065 INFO L124 PetriNetUnfolderBase]: 1313/2393 cut-off events. [2024-05-12 12:57:31,065 INFO L125 PetriNetUnfolderBase]: For 1400/1495 co-relation queries the response was YES. [2024-05-12 12:57:31,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6376 conditions, 2393 events. 1313/2393 cut-off events. For 1400/1495 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 13465 event pairs, 1099 based on Foata normal form. 30/2265 useless extension candidates. Maximal degree in co-relation 5757. Up to 2002 conditions per place. [2024-05-12 12:57:31,076 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 34 selfloop transitions, 2 changer transitions 21/61 dead transitions. [2024-05-12 12:57:31,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 319 flow [2024-05-12 12:57:31,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:57:31,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:57:31,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-05-12 12:57:31,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-05-12 12:57:31,078 INFO L175 Difference]: Start difference. First operand has 50 places, 39 transitions, 137 flow. Second operand 4 states and 76 transitions. [2024-05-12 12:57:31,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 319 flow [2024-05-12 12:57:31,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 61 transitions, 309 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-05-12 12:57:31,093 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 141 flow [2024-05-12 12:57:31,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2024-05-12 12:57:31,094 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 14 predicate places. [2024-05-12 12:57:31,095 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 141 flow [2024-05-12 12:57:31,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:57:31,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:57:31,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:57:31,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2024-05-12 12:57:31,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-05-12 12:57:31,301 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:57:31,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:57:31,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1826083178, now seen corresponding path program 1 times [2024-05-12 12:57:31,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-05-12 12:57:31,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [237232706] [2024-05-12 12:57:31,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:57:31,302 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-05-12 12:57:31,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-05-12 12:57:31,314 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-05-12 12:57:31,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-05-12 12:57:31,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:57:31,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2024-05-12 12:57:31,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:57:32,207 INFO L349 Elim1Store]: treesize reduction 80, result has 76.0 percent of original size [2024-05-12 12:57:32,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 174 treesize of output 286 [2024-05-12 12:57:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 12:57:32,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:57:42,717 WARN L293 SmtUtils]: Spent 5.68s on a formula simplification. DAG size of input: 394 DAG size of output: 346 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-05-12 12:57:42,717 INFO L349 Elim1Store]: treesize reduction 168, result has 90.0 percent of original size [2024-05-12 12:57:42,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 269 treesize of output 1571 [2024-05-12 12:58:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 12:58:09,091 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-05-12 12:58:09,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [237232706] [2024-05-12 12:58:09,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [237232706] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:58:09,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-05-12 12:58:09,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2024-05-12 12:58:09,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915648467] [2024-05-12 12:58:09,091 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-05-12 12:58:09,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-05-12 12:58:09,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-05-12 12:58:09,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-05-12 12:58:09,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=177, Unknown=1, NotChecked=0, Total=240 [2024-05-12 12:58:13,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-05-12 12:58:17,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-05-12 12:58:19,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-05-12 12:58:23,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-05-12 12:58:26,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-05-12 12:58:30,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-05-12 12:58:30,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-05-12 12:58:30,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 141 flow. Second operand has 16 states, 16 states have (on average 7.5) internal successors, (120), 16 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:58:30,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:58:30,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-05-12 12:58:30,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:58:33,713 INFO L124 PetriNetUnfolderBase]: 2298/3923 cut-off events. [2024-05-12 12:58:33,713 INFO L125 PetriNetUnfolderBase]: For 981/981 co-relation queries the response was YES. [2024-05-12 12:58:33,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9594 conditions, 3923 events. 2298/3923 cut-off events. For 981/981 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 20844 event pairs, 181 based on Foata normal form. 5/3726 useless extension candidates. Maximal degree in co-relation 9574. Up to 1129 conditions per place. [2024-05-12 12:58:33,733 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 107 selfloop transitions, 10 changer transitions 4/123 dead transitions. [2024-05-12 12:58:33,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 123 transitions, 643 flow [2024-05-12 12:58:33,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:58:33,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:58:33,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-05-12 12:58:33,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.404320987654321 [2024-05-12 12:58:33,734 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 141 flow. Second operand 9 states and 131 transitions. [2024-05-12 12:58:33,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 123 transitions, 643 flow [2024-05-12 12:58:33,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 123 transitions, 637 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-05-12 12:58:33,740 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 206 flow [2024-05-12 12:58:33,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=206, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2024-05-12 12:58:33,742 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 23 predicate places. [2024-05-12 12:58:33,742 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 206 flow [2024-05-12 12:58:33,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.5) internal successors, (120), 16 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:58:33,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:58:33,743 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:58:33,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2024-05-12 12:58:33,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-05-12 12:58:33,966 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:58:33,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:58:33,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1186070081, now seen corresponding path program 2 times [2024-05-12 12:58:33,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-05-12 12:58:33,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905696095] [2024-05-12 12:58:33,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 12:58:33,967 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-05-12 12:58:33,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-05-12 12:58:33,968 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-05-12 12:58:33,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-05-12 12:58:34,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 12:58:34,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:58:34,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2024-05-12 12:58:34,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:58:35,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:58:35,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:58:37,015 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:58:37,015 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-05-12 12:58:37,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905696095] [2024-05-12 12:58:37,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905696095] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:58:37,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-05-12 12:58:37,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2024-05-12 12:58:37,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088455738] [2024-05-12 12:58:37,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-05-12 12:58:37,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-05-12 12:58:37,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-05-12 12:58:37,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-05-12 12:58:37,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-05-12 12:58:37,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 36 [2024-05-12 12:58:37,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 206 flow. Second operand has 15 states, 15 states have (on average 8.933333333333334) internal successors, (134), 15 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:58:37,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:58:37,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 36 [2024-05-12 12:58:37,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:58:46,262 INFO L124 PetriNetUnfolderBase]: 10047/16646 cut-off events. [2024-05-12 12:58:46,262 INFO L125 PetriNetUnfolderBase]: For 10049/10049 co-relation queries the response was YES. [2024-05-12 12:58:46,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46249 conditions, 16646 events. 10047/16646 cut-off events. For 10049/10049 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 110490 event pairs, 2158 based on Foata normal form. 441/16403 useless extension candidates. Maximal degree in co-relation 29136. Up to 2949 conditions per place. [2024-05-12 12:58:46,337 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 280 selfloop transitions, 39 changer transitions 19/339 dead transitions. [2024-05-12 12:58:46,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 339 transitions, 1998 flow [2024-05-12 12:58:46,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-05-12 12:58:46,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-05-12 12:58:46,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 374 transitions. [2024-05-12 12:58:46,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43287037037037035 [2024-05-12 12:58:46,342 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 206 flow. Second operand 24 states and 374 transitions. [2024-05-12 12:58:46,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 339 transitions, 1998 flow [2024-05-12 12:58:46,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 339 transitions, 1972 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-05-12 12:58:46,428 INFO L231 Difference]: Finished difference. Result has 86 places, 91 transitions, 549 flow [2024-05-12 12:58:46,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=549, PETRI_PLACES=86, PETRI_TRANSITIONS=91} [2024-05-12 12:58:46,429 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 51 predicate places. [2024-05-12 12:58:46,429 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 91 transitions, 549 flow [2024-05-12 12:58:46,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.933333333333334) internal successors, (134), 15 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:58:46,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:58:46,430 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:58:46,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2024-05-12 12:58:46,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-05-12 12:58:46,631 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:58:46,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:58:46,631 INFO L85 PathProgramCache]: Analyzing trace with hash 874078565, now seen corresponding path program 3 times [2024-05-12 12:58:46,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-05-12 12:58:46,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2029000474] [2024-05-12 12:58:46,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-05-12 12:58:46,632 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-05-12 12:58:46,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-05-12 12:58:46,641 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-05-12 12:58:46,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2024-05-12 12:58:46,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-05-12 12:58:46,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:58:46,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2024-05-12 12:58:46,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:58:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:58:48,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:58:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:58:50,087 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-05-12 12:58:50,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2029000474] [2024-05-12 12:58:50,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2029000474] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:58:50,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-05-12 12:58:50,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-05-12 12:58:50,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824040468] [2024-05-12 12:58:50,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-05-12 12:58:50,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-05-12 12:58:50,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-05-12 12:58:50,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-05-12 12:58:50,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2024-05-12 12:58:50,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-05-12 12:58:50,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 91 transitions, 549 flow. Second operand has 14 states, 14 states have (on average 11.714285714285714) internal successors, (164), 14 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:58:50,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:58:50,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-05-12 12:58:50,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:58:56,146 INFO L124 PetriNetUnfolderBase]: 10017/18469 cut-off events. [2024-05-12 12:58:56,146 INFO L125 PetriNetUnfolderBase]: For 30548/31186 co-relation queries the response was YES. [2024-05-12 12:58:56,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60557 conditions, 18469 events. 10017/18469 cut-off events. For 30548/31186 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 151347 event pairs, 2295 based on Foata normal form. 537/18235 useless extension candidates. Maximal degree in co-relation 33017. Up to 3334 conditions per place. [2024-05-12 12:58:56,245 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 216 selfloop transitions, 42 changer transitions 12/277 dead transitions. [2024-05-12 12:58:56,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 277 transitions, 1940 flow [2024-05-12 12:58:56,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 12:58:56,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 12:58:56,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 249 transitions. [2024-05-12 12:58:56,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5763888888888888 [2024-05-12 12:58:56,248 INFO L175 Difference]: Start difference. First operand has 86 places, 91 transitions, 549 flow. Second operand 12 states and 249 transitions. [2024-05-12 12:58:56,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 277 transitions, 1940 flow [2024-05-12 12:58:56,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 277 transitions, 1808 flow, removed 65 selfloop flow, removed 1 redundant places. [2024-05-12 12:58:56,347 INFO L231 Difference]: Finished difference. Result has 99 places, 109 transitions, 721 flow [2024-05-12 12:58:56,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=721, PETRI_PLACES=99, PETRI_TRANSITIONS=109} [2024-05-12 12:58:56,348 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 64 predicate places. [2024-05-12 12:58:56,348 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 109 transitions, 721 flow [2024-05-12 12:58:56,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.714285714285714) internal successors, (164), 14 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:58:56,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:58:56,349 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:58:56,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2024-05-12 12:58:56,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-05-12 12:58:56,553 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:58:56,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:58:56,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1409835547, now seen corresponding path program 4 times [2024-05-12 12:58:56,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-05-12 12:58:56,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059564623] [2024-05-12 12:58:56,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-05-12 12:58:56,555 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-05-12 12:58:56,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-05-12 12:58:56,556 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-05-12 12:58:56,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-05-12 12:58:56,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-05-12 12:58:56,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:58:56,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2024-05-12 12:58:56,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:58:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 12:58:57,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:58:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 12:58:59,169 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-05-12 12:58:59,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059564623] [2024-05-12 12:58:59,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059564623] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:58:59,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-05-12 12:58:59,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-05-12 12:58:59,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643116592] [2024-05-12 12:58:59,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-05-12 12:58:59,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 12:58:59,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-05-12 12:58:59,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 12:58:59,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 12:58:59,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-05-12 12:58:59,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 109 transitions, 721 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:58:59,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:58:59,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-05-12 12:58:59,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:59:02,222 INFO L124 PetriNetUnfolderBase]: 8836/16740 cut-off events. [2024-05-12 12:59:02,223 INFO L125 PetriNetUnfolderBase]: For 28795/28925 co-relation queries the response was YES. [2024-05-12 12:59:02,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55547 conditions, 16740 events. 8836/16740 cut-off events. For 28795/28925 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 135646 event pairs, 6418 based on Foata normal form. 43/16091 useless extension candidates. Maximal degree in co-relation 31204. Up to 13361 conditions per place. [2024-05-12 12:59:02,406 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 80 selfloop transitions, 3 changer transitions 52/140 dead transitions. [2024-05-12 12:59:02,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 140 transitions, 1073 flow [2024-05-12 12:59:02,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:59:02,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:59:02,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-05-12 12:59:02,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-05-12 12:59:02,409 INFO L175 Difference]: Start difference. First operand has 99 places, 109 transitions, 721 flow. Second operand 6 states and 111 transitions. [2024-05-12 12:59:02,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 140 transitions, 1073 flow [2024-05-12 12:59:02,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 140 transitions, 1054 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-05-12 12:59:02,523 INFO L231 Difference]: Finished difference. Result has 98 places, 88 transitions, 563 flow [2024-05-12 12:59:02,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=563, PETRI_PLACES=98, PETRI_TRANSITIONS=88} [2024-05-12 12:59:02,524 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 63 predicate places. [2024-05-12 12:59:02,524 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 88 transitions, 563 flow [2024-05-12 12:59:02,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:59:02,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:59:02,524 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:59:02,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2024-05-12 12:59:02,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-05-12 12:59:02,728 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:59:02,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:59:02,729 INFO L85 PathProgramCache]: Analyzing trace with hash -965265441, now seen corresponding path program 5 times [2024-05-12 12:59:02,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-05-12 12:59:02,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099106923] [2024-05-12 12:59:02,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-05-12 12:59:02,729 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-05-12 12:59:02,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-05-12 12:59:02,731 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-05-12 12:59:02,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-05-12 12:59:02,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-05-12 12:59:02,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:59:02,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 34 conjunts are in the unsatisfiable core [2024-05-12 12:59:02,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:59:09,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:59:09,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:59:09,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:59:09,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:59:09,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:59:09,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:59:09,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:59:09,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:59:09,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:59:09,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:59:09,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:59:09,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:59:09,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:59:09,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:59:09,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:59:09,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:59:09,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:59:09,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:59:09,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:59:09,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:59:09,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:59:09,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:59:09,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:59:09,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:59:09,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:59:09,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:59:09,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:59:09,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-05-12 12:59:10,870 INFO L349 Elim1Store]: treesize reduction 684, result has 14.2 percent of original size [2024-05-12 12:59:10,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 62 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 280 treesize of output 176 [2024-05-12 12:59:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:59:15,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:59:34,825 WARN L293 SmtUtils]: Spent 9.59s on a formula simplification. DAG size of input: 326 DAG size of output: 252 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-05-12 12:59:34,826 INFO L349 Elim1Store]: treesize reduction 324, result has 78.2 percent of original size [2024-05-12 12:59:34,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 260 treesize of output 1213 [2024-05-12 13:00:23,294 WARN L293 SmtUtils]: Spent 28.18s on a formula simplification. DAG size of input: 779 DAG size of output: 513 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-05-12 13:00:23,294 INFO L349 Elim1Store]: treesize reduction 1085, result has 70.2 percent of original size [2024-05-12 13:00:23,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 24 select indices, 24 select index equivalence classes, 0 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 276 case distinctions, treesize of input 346 treesize of output 2619 Killed by 15