./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-simple-queue.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 80b1b132 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-simple-queue.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-?-80b1b13-m [2024-01-31 17:18:28,721 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:18:28,770 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:18:28,789 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:18:28,790 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:18:28,803 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:18:28,804 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:18:28,804 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:18:28,804 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:18:28,804 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:18:28,805 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:18:28,805 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:18:28,805 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:18:28,806 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:18:28,806 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:18:28,806 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:18:28,807 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:18:28,807 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:18:28,807 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:18:28,807 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:18:28,808 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:18:28,808 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:18:28,808 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:18:28,809 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:18:28,809 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:18:28,809 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:18:28,809 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:18:28,810 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:18:28,810 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:18:28,810 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:18:28,810 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:18:28,811 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:18:28,811 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:18:28,811 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:18:28,811 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:18:28,812 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:18:28,812 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:18:28,812 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:18:28,812 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:18:28,812 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:18:28,813 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:18:28,813 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:18:28,813 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:18:28,813 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:18:29,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:18:29,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:18:29,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:18:29,057 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:18:29,057 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:18:29,058 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2024-01-31 17:18:30,175 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:18:30,333 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:18:30,334 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2024-01-31 17:18:30,341 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cfe7c8cd/e12e43738416433dba22802d854c7a86/FLAG28a8b4e5f [2024-01-31 17:18:30,350 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cfe7c8cd/e12e43738416433dba22802d854c7a86 [2024-01-31 17:18:30,352 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:18:30,353 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:18:30,353 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-simple-queue.wvr.yml/witness.yml [2024-01-31 17:18:30,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:18:30,457 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:18:30,458 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:18:30,458 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:18:30,465 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:18:30,465 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:18:30" (1/2) ... [2024-01-31 17:18:30,466 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13176d4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:18:30, skipping insertion in model container [2024-01-31 17:18:30,467 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:18:30" (1/2) ... [2024-01-31 17:18:30,468 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4aa77fdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:18:30, skipping insertion in model container [2024-01-31 17:18:30,469 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:18:30" (2/2) ... [2024-01-31 17:18:30,469 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13176d4a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:18:30, skipping insertion in model container [2024-01-31 17:18:30,469 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:18:30" (2/2) ... [2024-01-31 17:18:30,470 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:18:30,524 INFO L93 nessWitnessExtractor]: Witness did not contain any usable entries. [2024-01-31 17:18:30,542 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:18:30,666 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c[2464,2477] [2024-01-31 17:18:30,673 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:18:30,687 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:18:30,703 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c[2464,2477] [2024-01-31 17:18:30,706 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:18:30,716 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:18:30,717 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:18:30 WrapperNode [2024-01-31 17:18:30,717 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:18:30,718 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:18:30,718 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:18:30,718 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:18:30,723 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 31.01 05:18:30" (1/1) ... [2024-01-31 17:18:30,728 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 31.01 05:18:30" (1/1) ... [2024-01-31 17:18:30,744 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 135 [2024-01-31 17:18:30,745 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:18:30,745 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:18:30,745 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:18:30,746 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:18:30,753 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:18:30" (1/1) ... [2024-01-31 17:18:30,754 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:18:30" (1/1) ... [2024-01-31 17:18:30,757 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:18:30" (1/1) ... [2024-01-31 17:18:30,767 INFO L175 MemorySlicer]: Split 9 memory accesses to 4 slices as follows [2, 2, 3, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-01-31 17:18:30,767 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:18:30" (1/1) ... [2024-01-31 17:18:30,767 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:18:30" (1/1) ... [2024-01-31 17:18:30,772 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:18:30" (1/1) ... [2024-01-31 17:18:30,774 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:18:30" (1/1) ... [2024-01-31 17:18:30,775 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:18:30" (1/1) ... [2024-01-31 17:18:30,776 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:18:30" (1/1) ... [2024-01-31 17:18:30,778 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:18:30,779 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:18:30,779 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:18:30,779 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:18:30,780 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:18:30" (1/1) ... [2024-01-31 17:18:30,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:18:30,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:18:30,810 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-31 17:18:30,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-31 17:18:30,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:18:30,837 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 17:18:30,837 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 17:18:30,837 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 17:18:30,837 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 17:18:30,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:18:30,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:18:30,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:18:30,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 17:18:30,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:18:30,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:18:30,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:18:30,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:18:30,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 17:18:30,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 17:18:30,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 17:18:30,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-31 17:18:30,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:18:30,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:18:30,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 17:18:30,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 17:18:30,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 17:18:30,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 17:18:30,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:18:30,841 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 17:18:30,929 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:18:30,931 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:18:31,103 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:18:31,103 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:18:31,248 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:18:31,248 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-31 17:18:31,248 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:18:31 BoogieIcfgContainer [2024-01-31 17:18:31,249 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:18:31,250 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:18:31,250 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:18:31,253 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:18:31,253 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:18:30" (1/4) ... [2024-01-31 17:18:31,253 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@108cb765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:18:31, skipping insertion in model container [2024-01-31 17:18:31,253 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:18:30" (2/4) ... [2024-01-31 17:18:31,254 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@108cb765 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:18:31, skipping insertion in model container [2024-01-31 17:18:31,254 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:18:30" (3/4) ... [2024-01-31 17:18:31,254 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@108cb765 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:18:31, skipping insertion in model container [2024-01-31 17:18:31,254 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:18:31" (4/4) ... [2024-01-31 17:18:31,255 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2024-01-31 17:18:31,269 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:18:31,270 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 17:18:31,270 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:18:31,309 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 17:18:31,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 29 transitions, 72 flow [2024-01-31 17:18:31,383 INFO L124 PetriNetUnfolderBase]: 5/27 cut-off events. [2024-01-31 17:18:31,386 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:18:31,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 5/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2024-01-31 17:18:31,389 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 29 transitions, 72 flow [2024-01-31 17:18:31,392 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 26 transitions, 64 flow [2024-01-31 17:18:31,406 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:18:31,412 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;@45535a83, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:18:31,413 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-31 17:18:31,427 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:18:31,427 INFO L124 PetriNetUnfolderBase]: 5/25 cut-off events. [2024-01-31 17:18:31,427 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:18:31,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:18:31,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:18:31,428 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:18:31,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:18:31,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1575601250, now seen corresponding path program 1 times [2024-01-31 17:18:31,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:18:31,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118454118] [2024-01-31 17:18:31,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:18:31,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:18:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:18:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:31,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:18:31,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118454118] [2024-01-31 17:18:31,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118454118] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:18:31,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:18:31,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:18:31,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401545027] [2024-01-31 17:18:31,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:18:31,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-01-31 17:18:31,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:18:31,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-01-31 17:18:31,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-01-31 17:18:31,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:18:31,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 26 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:31,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:18:31,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:18:31,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:18:31,809 INFO L124 PetriNetUnfolderBase]: 109/202 cut-off events. [2024-01-31 17:18:31,809 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-01-31 17:18:31,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 202 events. 109/202 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 770 event pairs, 64 based on Foata normal form. 40/190 useless extension candidates. Maximal degree in co-relation 334. Up to 180 conditions per place. [2024-01-31 17:18:31,815 INFO L140 encePairwiseOnDemand]: 27/29 looper letters, 19 selfloop transitions, 0 changer transitions 0/24 dead transitions. [2024-01-31 17:18:31,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 24 transitions, 98 flow [2024-01-31 17:18:31,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-01-31 17:18:31,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-01-31 17:18:31,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 35 transitions. [2024-01-31 17:18:31,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603448275862069 [2024-01-31 17:18:31,826 INFO L175 Difference]: Start difference. First operand has 28 places, 26 transitions, 64 flow. Second operand 2 states and 35 transitions. [2024-01-31 17:18:31,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 24 transitions, 98 flow [2024-01-31 17:18:31,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 24 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 17:18:31,831 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 52 flow [2024-01-31 17:18:31,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2024-01-31 17:18:31,836 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2024-01-31 17:18:31,837 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 52 flow [2024-01-31 17:18:31,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:31,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:18:31,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:18:31,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 17:18:31,839 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:18:31,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:18:31,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1742595539, now seen corresponding path program 1 times [2024-01-31 17:18:31,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:18:31,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986358791] [2024-01-31 17:18:31,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:18:31,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:18:31,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:18:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:31,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:18:31,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986358791] [2024-01-31 17:18:31,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986358791] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:18:31,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:18:31,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:18:31,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820817009] [2024-01-31 17:18:31,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:18:31,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:18:31,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:18:31,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:18:31,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:18:31,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:18:31,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:31,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:18:31,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:18:31,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:18:32,022 INFO L124 PetriNetUnfolderBase]: 164/302 cut-off events. [2024-01-31 17:18:32,023 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-01-31 17:18:32,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 302 events. 164/302 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1224 event pairs, 56 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 582. Up to 139 conditions per place. [2024-01-31 17:18:32,026 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 26 selfloop transitions, 2 changer transitions 3/36 dead transitions. [2024-01-31 17:18:32,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 36 transitions, 140 flow [2024-01-31 17:18:32,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:18:32,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:18:32,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-01-31 17:18:32,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2024-01-31 17:18:32,028 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 52 flow. Second operand 3 states and 53 transitions. [2024-01-31 17:18:32,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 36 transitions, 140 flow [2024-01-31 17:18:32,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 36 transitions, 140 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 17:18:32,029 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 64 flow [2024-01-31 17:18:32,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2024-01-31 17:18:32,030 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2024-01-31 17:18:32,030 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 64 flow [2024-01-31 17:18:32,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:32,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:18:32,031 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:18:32,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 17:18:32,031 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:18:32,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:18:32,032 INFO L85 PathProgramCache]: Analyzing trace with hash -358079149, now seen corresponding path program 1 times [2024-01-31 17:18:32,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:18:32,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732239110] [2024-01-31 17:18:32,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:18:32,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:18:32,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:18:32,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:32,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:18:32,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732239110] [2024-01-31 17:18:32,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732239110] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:18:32,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:18:32,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:18:32,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616322156] [2024-01-31 17:18:32,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:18:32,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:18:32,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:18:32,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:18:32,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:18:32,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:18:32,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:32,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:18:32,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:18:32,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:18:32,196 INFO L124 PetriNetUnfolderBase]: 176/345 cut-off events. [2024-01-31 17:18:32,196 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-01-31 17:18:32,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 345 events. 176/345 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1570 event pairs, 77 based on Foata normal form. 10/289 useless extension candidates. Maximal degree in co-relation 704. Up to 222 conditions per place. [2024-01-31 17:18:32,200 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 24 selfloop transitions, 2 changer transitions 7/38 dead transitions. [2024-01-31 17:18:32,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 38 transitions, 159 flow [2024-01-31 17:18:32,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:18:32,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:18:32,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2024-01-31 17:18:32,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2024-01-31 17:18:32,203 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 64 flow. Second operand 3 states and 54 transitions. [2024-01-31 17:18:32,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 38 transitions, 159 flow [2024-01-31 17:18:32,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 38 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:18:32,207 INFO L231 Difference]: Finished difference. Result has 30 places, 26 transitions, 74 flow [2024-01-31 17:18:32,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=30, PETRI_TRANSITIONS=26} [2024-01-31 17:18:32,208 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2024-01-31 17:18:32,208 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 26 transitions, 74 flow [2024-01-31 17:18:32,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:32,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:18:32,209 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:18:32,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 17:18:32,209 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:18:32,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:18:32,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1064370560, now seen corresponding path program 1 times [2024-01-31 17:18:32,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:18:32,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595988489] [2024-01-31 17:18:32,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:18:32,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:18:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:18:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:32,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:18:32,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595988489] [2024-01-31 17:18:32,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595988489] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:18:32,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:18:32,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:18:32,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489242749] [2024-01-31 17:18:32,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:18:32,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:18:32,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:18:32,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:18:32,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:18:32,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:18:32,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:32,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:18:32,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:18:32,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:18:32,446 INFO L124 PetriNetUnfolderBase]: 221/449 cut-off events. [2024-01-31 17:18:32,447 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2024-01-31 17:18:32,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 954 conditions, 449 events. 221/449 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2275 event pairs, 192 based on Foata normal form. 10/367 useless extension candidates. Maximal degree in co-relation 948. Up to 319 conditions per place. [2024-01-31 17:18:32,448 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 20 selfloop transitions, 2 changer transitions 14/41 dead transitions. [2024-01-31 17:18:32,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 41 transitions, 180 flow [2024-01-31 17:18:32,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:18:32,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:18:32,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2024-01-31 17:18:32,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5431034482758621 [2024-01-31 17:18:32,452 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 74 flow. Second operand 4 states and 63 transitions. [2024-01-31 17:18:32,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 41 transitions, 180 flow [2024-01-31 17:18:32,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 41 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:18:32,454 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 86 flow [2024-01-31 17:18:32,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2024-01-31 17:18:32,455 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2024-01-31 17:18:32,455 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 86 flow [2024-01-31 17:18:32,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:32,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:18:32,456 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:18:32,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 17:18:32,456 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:18:32,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:18:32,457 INFO L85 PathProgramCache]: Analyzing trace with hash -185195771, now seen corresponding path program 1 times [2024-01-31 17:18:32,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:18:32,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828817863] [2024-01-31 17:18:32,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:18:32,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:18:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:18:32,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:32,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:18:32,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828817863] [2024-01-31 17:18:32,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828817863] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:18:32,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345794404] [2024-01-31 17:18:32,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:18:32,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:18:32,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:18:32,782 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:18:32,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-31 17:18:32,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:18:32,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 20 conjunts are in the unsatisfiable core [2024-01-31 17:18:32,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:18:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:33,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:18:33,172 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:18:33,173 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 24 treesize of output 11 [2024-01-31 17:18:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:33,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345794404] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:18:33,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:18:33,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-01-31 17:18:33,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832113786] [2024-01-31 17:18:33,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:18:33,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:18:33,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:18:33,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:18:33,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:18:33,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:18:33,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 86 flow. Second operand has 15 states, 15 states have (on average 10.266666666666667) internal successors, (154), 15 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:33,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:18:33,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:18:33,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:18:33,766 INFO L124 PetriNetUnfolderBase]: 687/1324 cut-off events. [2024-01-31 17:18:33,767 INFO L125 PetriNetUnfolderBase]: For 195/195 co-relation queries the response was YES. [2024-01-31 17:18:33,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2825 conditions, 1324 events. 687/1324 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 7505 event pairs, 114 based on Foata normal form. 5/1091 useless extension candidates. Maximal degree in co-relation 2817. Up to 208 conditions per place. [2024-01-31 17:18:33,771 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 98 selfloop transitions, 17 changer transitions 25/145 dead transitions. [2024-01-31 17:18:33,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 145 transitions, 670 flow [2024-01-31 17:18:33,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 17:18:33,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 17:18:33,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 234 transitions. [2024-01-31 17:18:33,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2024-01-31 17:18:33,776 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 86 flow. Second operand 13 states and 234 transitions. [2024-01-31 17:18:33,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 145 transitions, 670 flow [2024-01-31 17:18:33,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 145 transitions, 662 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-01-31 17:18:33,782 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 220 flow [2024-01-31 17:18:33,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=220, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2024-01-31 17:18:33,783 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 22 predicate places. [2024-01-31 17:18:33,784 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 220 flow [2024-01-31 17:18:33,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.266666666666667) internal successors, (154), 15 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:33,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:18:33,784 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:18:33,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-31 17:18:33,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:18:33,997 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:18:33,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:18:33,997 INFO L85 PathProgramCache]: Analyzing trace with hash -932983080, now seen corresponding path program 2 times [2024-01-31 17:18:33,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:18:33,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373762448] [2024-01-31 17:18:33,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:18:33,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:18:34,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:18:34,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-31 17:18:34,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:18:34,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373762448] [2024-01-31 17:18:34,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373762448] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:18:34,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042557552] [2024-01-31 17:18:34,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:18:34,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:18:34,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:18:34,076 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:18:34,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-31 17:18:34,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:18:34,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:18:34,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-31 17:18:34,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:18:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-31 17:18:34,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:18:34,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:18:34,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042557552] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:18:34,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:18:34,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 6 [2024-01-31 17:18:34,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573513027] [2024-01-31 17:18:34,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:18:34,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 17:18:34,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:18:34,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 17:18:34,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-01-31 17:18:34,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:18:34,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 220 flow. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:34,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:18:34,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:18:34,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:18:34,457 INFO L124 PetriNetUnfolderBase]: 1121/2161 cut-off events. [2024-01-31 17:18:34,457 INFO L125 PetriNetUnfolderBase]: For 1944/1944 co-relation queries the response was YES. [2024-01-31 17:18:34,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5301 conditions, 2161 events. 1121/2161 cut-off events. For 1944/1944 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 13745 event pairs, 430 based on Foata normal form. 30/1804 useless extension candidates. Maximal degree in co-relation 5287. Up to 1050 conditions per place. [2024-01-31 17:18:34,465 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 59 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-01-31 17:18:34,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 75 transitions, 510 flow [2024-01-31 17:18:34,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:18:34,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:18:34,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2024-01-31 17:18:34,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6637931034482759 [2024-01-31 17:18:34,467 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 220 flow. Second operand 4 states and 77 transitions. [2024-01-31 17:18:34,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 75 transitions, 510 flow [2024-01-31 17:18:34,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 75 transitions, 486 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-01-31 17:18:34,472 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 326 flow [2024-01-31 17:18:34,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=326, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-01-31 17:18:34,473 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 26 predicate places. [2024-01-31 17:18:34,473 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 326 flow [2024-01-31 17:18:34,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:34,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:18:34,473 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:18:34,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 17:18:34,684 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,SelfDestructingSolverStorable5 [2024-01-31 17:18:34,684 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:18:34,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:18:34,685 INFO L85 PathProgramCache]: Analyzing trace with hash -252360159, now seen corresponding path program 3 times [2024-01-31 17:18:34,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:18:34,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730112303] [2024-01-31 17:18:34,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:18:34,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:18:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:18:35,111 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:35,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:18:35,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730112303] [2024-01-31 17:18:35,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730112303] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:18:35,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471735284] [2024-01-31 17:18:35,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:18:35,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:18:35,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:18:35,113 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:18:35,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-31 17:18:35,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-31 17:18:35,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:18:35,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 26 conjunts are in the unsatisfiable core [2024-01-31 17:18:35,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:18:35,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-31 17:18:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:35,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:18:36,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-01-31 17:18:36,020 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:18:36,020 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 46 treesize of output 37 [2024-01-31 17:18:36,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:36,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471735284] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:18:36,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:18:36,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-01-31 17:18:36,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046108103] [2024-01-31 17:18:36,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:18:36,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 17:18:36,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:18:36,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 17:18:36,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2024-01-31 17:18:36,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:18:36,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 326 flow. Second operand has 24 states, 24 states have (on average 9.333333333333334) internal successors, (224), 24 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:36,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:18:36,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:18:36,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:18:37,058 INFO L124 PetriNetUnfolderBase]: 1422/2842 cut-off events. [2024-01-31 17:18:37,058 INFO L125 PetriNetUnfolderBase]: For 4755/4755 co-relation queries the response was YES. [2024-01-31 17:18:37,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7213 conditions, 2842 events. 1422/2842 cut-off events. For 4755/4755 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 19506 event pairs, 243 based on Foata normal form. 72/2393 useless extension candidates. Maximal degree in co-relation 7196. Up to 443 conditions per place. [2024-01-31 17:18:37,067 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 90 selfloop transitions, 16 changer transitions 86/197 dead transitions. [2024-01-31 17:18:37,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 197 transitions, 1224 flow [2024-01-31 17:18:37,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-31 17:18:37,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-31 17:18:37,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 307 transitions. [2024-01-31 17:18:37,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5881226053639846 [2024-01-31 17:18:37,069 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 326 flow. Second operand 18 states and 307 transitions. [2024-01-31 17:18:37,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 197 transitions, 1224 flow [2024-01-31 17:18:37,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 197 transitions, 1160 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-01-31 17:18:37,076 INFO L231 Difference]: Finished difference. Result has 73 places, 41 transitions, 321 flow [2024-01-31 17:18:37,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=321, PETRI_PLACES=73, PETRI_TRANSITIONS=41} [2024-01-31 17:18:37,077 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 45 predicate places. [2024-01-31 17:18:37,077 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 41 transitions, 321 flow [2024-01-31 17:18:37,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 9.333333333333334) internal successors, (224), 24 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:37,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:18:37,078 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:18:37,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 17:18:37,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:18:37,289 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:18:37,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:18:37,289 INFO L85 PathProgramCache]: Analyzing trace with hash -157615995, now seen corresponding path program 4 times [2024-01-31 17:18:37,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:18:37,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189018564] [2024-01-31 17:18:37,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:18:37,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:18:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:18:37,640 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:37,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:18:37,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189018564] [2024-01-31 17:18:37,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189018564] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:18:37,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682362417] [2024-01-31 17:18:37,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:18:37,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:18:37,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:18:37,642 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:18:37,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-31 17:18:37,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:18:37,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:18:37,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 17:18:37,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:18:37,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-31 17:18:37,969 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:18:37,969 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 23 treesize of output 10 [2024-01-31 17:18:37,974 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:37,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:18:38,249 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 39 treesize of output 35 [2024-01-31 17:18:38,256 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-01-31 17:18:38,256 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 51 treesize of output 43 [2024-01-31 17:18:38,334 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:38,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682362417] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:18:38,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:18:38,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-01-31 17:18:38,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045283339] [2024-01-31 17:18:38,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:18:38,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 17:18:38,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:18:38,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 17:18:38,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2024-01-31 17:18:38,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:18:38,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 41 transitions, 321 flow. Second operand has 24 states, 24 states have (on average 9.666666666666666) internal successors, (232), 24 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:38,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:18:38,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:18:38,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:18:39,001 INFO L124 PetriNetUnfolderBase]: 795/1604 cut-off events. [2024-01-31 17:18:39,001 INFO L125 PetriNetUnfolderBase]: For 3803/3803 co-relation queries the response was YES. [2024-01-31 17:18:39,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4385 conditions, 1604 events. 795/1604 cut-off events. For 3803/3803 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 9938 event pairs, 290 based on Foata normal form. 2/1310 useless extension candidates. Maximal degree in co-relation 4361. Up to 586 conditions per place. [2024-01-31 17:18:39,007 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 33 selfloop transitions, 6 changer transitions 76/120 dead transitions. [2024-01-31 17:18:39,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 120 transitions, 760 flow [2024-01-31 17:18:39,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 17:18:39,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 17:18:39,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 193 transitions. [2024-01-31 17:18:39,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5545977011494253 [2024-01-31 17:18:39,008 INFO L175 Difference]: Start difference. First operand has 73 places, 41 transitions, 321 flow. Second operand 12 states and 193 transitions. [2024-01-31 17:18:39,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 120 transitions, 760 flow [2024-01-31 17:18:39,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 120 transitions, 679 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-01-31 17:18:39,017 INFO L231 Difference]: Finished difference. Result has 70 places, 35 transitions, 217 flow [2024-01-31 17:18:39,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=217, PETRI_PLACES=70, PETRI_TRANSITIONS=35} [2024-01-31 17:18:39,019 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 42 predicate places. [2024-01-31 17:18:39,020 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 35 transitions, 217 flow [2024-01-31 17:18:39,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 9.666666666666666) internal successors, (232), 24 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:39,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:18:39,020 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:18:39,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-31 17:18:39,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:18:39,232 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:18:39,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:18:39,233 INFO L85 PathProgramCache]: Analyzing trace with hash 2101662666, now seen corresponding path program 5 times [2024-01-31 17:18:39,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:18:39,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969319610] [2024-01-31 17:18:39,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:18:39,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:18:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:18:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:39,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:18:39,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969319610] [2024-01-31 17:18:39,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969319610] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:18:39,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287600337] [2024-01-31 17:18:39,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:18:39,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:18:39,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:18:39,665 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:18:39,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-31 17:18:39,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 17:18:39,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:18:39,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 16 conjunts are in the unsatisfiable core [2024-01-31 17:18:39,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:18:39,838 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:18:39,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:18:39,858 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-01-31 17:18:39,859 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 25 treesize of output 13 [2024-01-31 17:18:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 17:18:39,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287600337] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:18:39,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:18:39,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 6] total 15 [2024-01-31 17:18:39,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785870036] [2024-01-31 17:18:39,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:18:39,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 17:18:39,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:18:39,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 17:18:39,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-01-31 17:18:39,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:18:39,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 35 transitions, 217 flow. Second operand has 16 states, 16 states have (on average 9.875) internal successors, (158), 16 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:39,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:18:39,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:18:39,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:18:40,424 INFO L124 PetriNetUnfolderBase]: 963/1859 cut-off events. [2024-01-31 17:18:40,425 INFO L125 PetriNetUnfolderBase]: For 4619/4619 co-relation queries the response was YES. [2024-01-31 17:18:40,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5292 conditions, 1859 events. 963/1859 cut-off events. For 4619/4619 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 11299 event pairs, 138 based on Foata normal form. 5/1534 useless extension candidates. Maximal degree in co-relation 5269. Up to 303 conditions per place. [2024-01-31 17:18:40,432 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 81 selfloop transitions, 23 changer transitions 43/152 dead transitions. [2024-01-31 17:18:40,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 152 transitions, 954 flow [2024-01-31 17:18:40,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 17:18:40,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 17:18:40,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 251 transitions. [2024-01-31 17:18:40,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5770114942528736 [2024-01-31 17:18:40,434 INFO L175 Difference]: Start difference. First operand has 70 places, 35 transitions, 217 flow. Second operand 15 states and 251 transitions. [2024-01-31 17:18:40,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 152 transitions, 954 flow [2024-01-31 17:18:40,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 152 transitions, 856 flow, removed 41 selfloop flow, removed 12 redundant places. [2024-01-31 17:18:40,443 INFO L231 Difference]: Finished difference. Result has 66 places, 46 transitions, 377 flow [2024-01-31 17:18:40,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=377, PETRI_PLACES=66, PETRI_TRANSITIONS=46} [2024-01-31 17:18:40,444 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 38 predicate places. [2024-01-31 17:18:40,444 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 46 transitions, 377 flow [2024-01-31 17:18:40,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.875) internal successors, (158), 16 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:40,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:18:40,444 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:18:40,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-01-31 17:18:40,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:18:40,655 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:18:40,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:18:40,656 INFO L85 PathProgramCache]: Analyzing trace with hash 942958126, now seen corresponding path program 6 times [2024-01-31 17:18:40,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:18:40,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667514541] [2024-01-31 17:18:40,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:18:40,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:18:40,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:18:40,724 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-01-31 17:18:40,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:18:40,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667514541] [2024-01-31 17:18:40,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667514541] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:18:40,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305524993] [2024-01-31 17:18:40,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:18:40,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:18:40,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:18:40,726 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:18:40,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-31 17:18:40,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 17:18:40,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:18:40,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:18:40,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:18:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-01-31 17:18:40,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:18:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 17:18:40,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305524993] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:18:40,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:18:40,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2024-01-31 17:18:40,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516702575] [2024-01-31 17:18:40,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:18:40,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 17:18:40,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:18:40,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 17:18:40,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-01-31 17:18:40,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:18:40,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 46 transitions, 377 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:40,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:18:40,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:18:40,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:18:41,212 INFO L124 PetriNetUnfolderBase]: 1855/3528 cut-off events. [2024-01-31 17:18:41,213 INFO L125 PetriNetUnfolderBase]: For 7293/7293 co-relation queries the response was YES. [2024-01-31 17:18:41,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9758 conditions, 3528 events. 1855/3528 cut-off events. For 7293/7293 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 23898 event pairs, 482 based on Foata normal form. 20/2924 useless extension candidates. Maximal degree in co-relation 9736. Up to 983 conditions per place. [2024-01-31 17:18:41,227 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 70 selfloop transitions, 27 changer transitions 0/102 dead transitions. [2024-01-31 17:18:41,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 102 transitions, 931 flow [2024-01-31 17:18:41,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:18:41,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:18:41,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-01-31 17:18:41,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6827586206896552 [2024-01-31 17:18:41,228 INFO L175 Difference]: Start difference. First operand has 66 places, 46 transitions, 377 flow. Second operand 5 states and 99 transitions. [2024-01-31 17:18:41,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 102 transitions, 931 flow [2024-01-31 17:18:41,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 102 transitions, 771 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-01-31 17:18:41,236 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 529 flow [2024-01-31 17:18:41,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=529, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-01-31 17:18:41,236 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 36 predicate places. [2024-01-31 17:18:41,236 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 529 flow [2024-01-31 17:18:41,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:41,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:18:41,237 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:18:41,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-31 17:18:41,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:18:41,449 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:18:41,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:18:41,449 INFO L85 PathProgramCache]: Analyzing trace with hash -473286583, now seen corresponding path program 7 times [2024-01-31 17:18:41,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:18:41,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609593093] [2024-01-31 17:18:41,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:18:41,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:18:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:18:41,864 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:41,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:18:41,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609593093] [2024-01-31 17:18:41,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609593093] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:18:41,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451540697] [2024-01-31 17:18:41,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:18:41,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:18:41,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:18:41,866 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:18:41,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-31 17:18:41,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:18:41,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-31 17:18:41,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:18:42,224 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:18:42,225 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 23 treesize of output 10 [2024-01-31 17:18:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:42,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:18:42,268 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:18:42,268 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 24 treesize of output 11 [2024-01-31 17:18:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:42,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451540697] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:18:42,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:18:42,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2024-01-31 17:18:42,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572597352] [2024-01-31 17:18:42,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:18:42,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-31 17:18:42,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:18:42,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-31 17:18:42,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2024-01-31 17:18:42,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:18:42,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 529 flow. Second operand has 33 states, 33 states have (on average 9.151515151515152) internal successors, (302), 33 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:42,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:18:42,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:18:42,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:18:44,430 INFO L124 PetriNetUnfolderBase]: 3715/7183 cut-off events. [2024-01-31 17:18:44,430 INFO L125 PetriNetUnfolderBase]: For 12435/12435 co-relation queries the response was YES. [2024-01-31 17:18:44,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19147 conditions, 7183 events. 3715/7183 cut-off events. For 12435/12435 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 55667 event pairs, 386 based on Foata normal form. 105/6018 useless extension candidates. Maximal degree in co-relation 19125. Up to 1104 conditions per place. [2024-01-31 17:18:44,462 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 205 selfloop transitions, 78 changer transitions 73/361 dead transitions. [2024-01-31 17:18:44,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 361 transitions, 2448 flow [2024-01-31 17:18:44,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-31 17:18:44,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-31 17:18:44,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 535 transitions. [2024-01-31 17:18:44,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6149425287356322 [2024-01-31 17:18:44,467 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 529 flow. Second operand 30 states and 535 transitions. [2024-01-31 17:18:44,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 361 transitions, 2448 flow [2024-01-31 17:18:44,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 361 transitions, 2334 flow, removed 57 selfloop flow, removed 0 redundant places. [2024-01-31 17:18:44,489 INFO L231 Difference]: Finished difference. Result has 107 places, 103 transitions, 1164 flow [2024-01-31 17:18:44,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1164, PETRI_PLACES=107, PETRI_TRANSITIONS=103} [2024-01-31 17:18:44,490 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 79 predicate places. [2024-01-31 17:18:44,490 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 103 transitions, 1164 flow [2024-01-31 17:18:44,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 9.151515151515152) internal successors, (302), 33 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:44,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:18:44,491 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:18:44,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-31 17:18:44,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:18:44,702 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:18:44,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:18:44,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1434268923, now seen corresponding path program 8 times [2024-01-31 17:18:44,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:18:44,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832411982] [2024-01-31 17:18:44,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:18:44,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:18:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:18:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:45,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:18:45,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832411982] [2024-01-31 17:18:45,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832411982] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:18:45,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641377257] [2024-01-31 17:18:45,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:18:45,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:18:45,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:18:45,057 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:18:45,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-31 17:18:45,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:18:45,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:18:45,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 17:18:45,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:18:45,453 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:45,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:18:45,593 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-01-31 17:18:45,594 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 25 treesize of output 13 [2024-01-31 17:18:45,838 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:45,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641377257] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:18:45,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:18:45,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2024-01-31 17:18:45,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926524300] [2024-01-31 17:18:45,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:18:45,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-31 17:18:45,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:18:45,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-31 17:18:45,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2024-01-31 17:18:45,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:18:45,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 103 transitions, 1164 flow. Second operand has 33 states, 33 states have (on average 9.393939393939394) internal successors, (310), 33 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:45,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:18:45,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:18:45,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:18:49,270 INFO L124 PetriNetUnfolderBase]: 5040/9723 cut-off events. [2024-01-31 17:18:49,270 INFO L125 PetriNetUnfolderBase]: For 32291/32291 co-relation queries the response was YES. [2024-01-31 17:18:49,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28304 conditions, 9723 events. 5040/9723 cut-off events. For 32291/32291 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 78820 event pairs, 210 based on Foata normal form. 29/8050 useless extension candidates. Maximal degree in co-relation 28267. Up to 1488 conditions per place. [2024-01-31 17:18:49,337 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 140 selfloop transitions, 93 changer transitions 297/535 dead transitions. [2024-01-31 17:18:49,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 535 transitions, 3895 flow [2024-01-31 17:18:49,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-01-31 17:18:49,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-01-31 17:18:49,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 769 transitions. [2024-01-31 17:18:49,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6313628899835796 [2024-01-31 17:18:49,344 INFO L175 Difference]: Start difference. First operand has 107 places, 103 transitions, 1164 flow. Second operand 42 states and 769 transitions. [2024-01-31 17:18:49,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 535 transitions, 3895 flow [2024-01-31 17:18:49,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 535 transitions, 3705 flow, removed 74 selfloop flow, removed 6 redundant places. [2024-01-31 17:18:49,442 INFO L231 Difference]: Finished difference. Result has 152 places, 116 transitions, 1486 flow [2024-01-31 17:18:49,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1018, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1486, PETRI_PLACES=152, PETRI_TRANSITIONS=116} [2024-01-31 17:18:49,443 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 124 predicate places. [2024-01-31 17:18:49,444 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 116 transitions, 1486 flow [2024-01-31 17:18:49,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 9.393939393939394) internal successors, (310), 33 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:49,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:18:49,445 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:18:49,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-01-31 17:18:49,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-01-31 17:18:49,655 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:18:49,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:18:49,656 INFO L85 PathProgramCache]: Analyzing trace with hash -466474472, now seen corresponding path program 9 times [2024-01-31 17:18:49,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:18:49,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421441452] [2024-01-31 17:18:49,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:18:49,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:18:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:18:49,741 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-01-31 17:18:49,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:18:49,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421441452] [2024-01-31 17:18:49,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421441452] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:18:49,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122968732] [2024-01-31 17:18:49,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:18:49,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:18:49,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:18:49,743 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:18:49,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-31 17:18:49,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-31 17:18:49,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:18:49,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:18:49,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:18:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-01-31 17:18:49,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:18:50,003 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 17:18:50,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122968732] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:18:50,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:18:50,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8] total 12 [2024-01-31 17:18:50,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933267867] [2024-01-31 17:18:50,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:18:50,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 17:18:50,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:18:50,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 17:18:50,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2024-01-31 17:18:50,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:18:50,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 116 transitions, 1486 flow. Second operand has 13 states, 13 states have (on average 11.076923076923077) internal successors, (144), 13 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:50,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:18:50,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:18:50,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:18:51,203 INFO L124 PetriNetUnfolderBase]: 6159/11529 cut-off events. [2024-01-31 17:18:51,203 INFO L125 PetriNetUnfolderBase]: For 62471/62471 co-relation queries the response was YES. [2024-01-31 17:18:51,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37795 conditions, 11529 events. 6159/11529 cut-off events. For 62471/62471 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 94904 event pairs, 1197 based on Foata normal form. 20/9534 useless extension candidates. Maximal degree in co-relation 37747. Up to 2855 conditions per place. [2024-01-31 17:18:51,255 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 102 selfloop transitions, 109 changer transitions 0/216 dead transitions. [2024-01-31 17:18:51,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 216 transitions, 3025 flow [2024-01-31 17:18:51,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:18:51,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:18:51,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-01-31 17:18:51,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6954022988505747 [2024-01-31 17:18:51,256 INFO L175 Difference]: Start difference. First operand has 152 places, 116 transitions, 1486 flow. Second operand 6 states and 121 transitions. [2024-01-31 17:18:51,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 216 transitions, 3025 flow [2024-01-31 17:18:51,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 216 transitions, 2553 flow, removed 146 selfloop flow, removed 22 redundant places. [2024-01-31 17:18:51,335 INFO L231 Difference]: Finished difference. Result has 108 places, 164 transitions, 2161 flow [2024-01-31 17:18:51,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2161, PETRI_PLACES=108, PETRI_TRANSITIONS=164} [2024-01-31 17:18:51,336 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 80 predicate places. [2024-01-31 17:18:51,336 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 164 transitions, 2161 flow [2024-01-31 17:18:51,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.076923076923077) internal successors, (144), 13 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:51,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:18:51,336 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:18:51,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-01-31 17:18:51,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-01-31 17:18:51,548 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:18:51,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:18:51,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1982854687, now seen corresponding path program 10 times [2024-01-31 17:18:51,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:18:51,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111310921] [2024-01-31 17:18:51,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:18:51,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:18:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:18:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:52,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:18:52,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111310921] [2024-01-31 17:18:52,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111310921] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:18:52,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168136610] [2024-01-31 17:18:52,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:18:52,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:18:52,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:18:52,124 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:18:52,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-31 17:18:52,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:18:52,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:18:52,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-31 17:18:52,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:18:52,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-31 17:18:52,602 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:18:52,602 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 23 treesize of output 10 [2024-01-31 17:18:52,613 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:52,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:18:53,298 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 39 treesize of output 35 [2024-01-31 17:18:53,305 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-01-31 17:18:53,305 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 51 treesize of output 43 [2024-01-31 17:18:53,507 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:53,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168136610] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:18:53,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:18:53,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 41 [2024-01-31 17:18:53,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001343439] [2024-01-31 17:18:53,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:18:53,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-01-31 17:18:53,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:18:53,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-01-31 17:18:53,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1487, Unknown=0, NotChecked=0, Total=1722 [2024-01-31 17:18:53,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:18:53,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 164 transitions, 2161 flow. Second operand has 42 states, 42 states have (on average 9.047619047619047) internal successors, (380), 42 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:53,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:18:53,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:18:53,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:19:02,939 INFO L124 PetriNetUnfolderBase]: 19133/36678 cut-off events. [2024-01-31 17:19:02,939 INFO L125 PetriNetUnfolderBase]: For 103936/103936 co-relation queries the response was YES. [2024-01-31 17:19:03,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106066 conditions, 36678 events. 19133/36678 cut-off events. For 103936/103936 co-relation queries the response was YES. Maximal size of possible extension queue 1252. Compared 348893 event pairs, 4926 based on Foata normal form. 285/30613 useless extension candidates. Maximal degree in co-relation 106029. Up to 9154 conditions per place. [2024-01-31 17:19:03,173 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 658 selfloop transitions, 221 changer transitions 336/1220 dead transitions. [2024-01-31 17:19:03,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 1220 transitions, 11127 flow [2024-01-31 17:19:03,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-01-31 17:19:03,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2024-01-31 17:19:03,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 1427 transitions. [2024-01-31 17:19:03,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6308576480990274 [2024-01-31 17:19:03,176 INFO L175 Difference]: Start difference. First operand has 108 places, 164 transitions, 2161 flow. Second operand 78 states and 1427 transitions. [2024-01-31 17:19:03,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 1220 transitions, 11127 flow [2024-01-31 17:19:03,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 1220 transitions, 10457 flow, removed 335 selfloop flow, removed 0 redundant places. [2024-01-31 17:19:03,639 INFO L231 Difference]: Finished difference. Result has 249 places, 375 transitions, 5853 flow [2024-01-31 17:19:03,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2019, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=5853, PETRI_PLACES=249, PETRI_TRANSITIONS=375} [2024-01-31 17:19:03,640 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 221 predicate places. [2024-01-31 17:19:03,640 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 375 transitions, 5853 flow [2024-01-31 17:19:03,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 9.047619047619047) internal successors, (380), 42 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:19:03,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:19:03,641 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:19:03,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-31 17:19:03,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-31 17:19:03,851 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:19:03,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:19:03,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1656907141, now seen corresponding path program 11 times [2024-01-31 17:19:03,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:19:03,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030695636] [2024-01-31 17:19:03,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:19:03,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:19:03,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:19:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:19:04,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:19:04,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030695636] [2024-01-31 17:19:04,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030695636] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:19:04,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559337978] [2024-01-31 17:19:04,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:19:04,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:19:04,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:19:04,424 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:19:04,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-31 17:19:04,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-01-31 17:19:04,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:19:04,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 28 conjunts are in the unsatisfiable core [2024-01-31 17:19:04,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:19:04,760 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:19:04,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:19:04,794 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-01-31 17:19:04,795 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 25 treesize of output 13 [2024-01-31 17:19:04,819 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 17:19:04,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559337978] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:19:04,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:19:04,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 10] total 26 [2024-01-31 17:19:04,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784200745] [2024-01-31 17:19:04,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:19:04,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 17:19:04,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:19:04,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 17:19:04,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2024-01-31 17:19:04,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:19:04,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 375 transitions, 5853 flow. Second operand has 27 states, 27 states have (on average 9.407407407407407) internal successors, (254), 27 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:19:04,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:19:04,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:19:04,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:19:22,428 INFO L124 PetriNetUnfolderBase]: 36895/69567 cut-off events. [2024-01-31 17:19:22,428 INFO L125 PetriNetUnfolderBase]: For 996929/996929 co-relation queries the response was YES. [2024-01-31 17:19:23,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266333 conditions, 69567 events. 36895/69567 cut-off events. For 996929/996929 co-relation queries the response was YES. Maximal size of possible extension queue 1405. Compared 668910 event pairs, 3066 based on Foata normal form. 82/57593 useless extension candidates. Maximal degree in co-relation 266231. Up to 10688 conditions per place. [2024-01-31 17:19:23,538 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 672 selfloop transitions, 776 changer transitions 186/1639 dead transitions. [2024-01-31 17:19:23,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 1639 transitions, 22067 flow [2024-01-31 17:19:23,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-01-31 17:19:23,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2024-01-31 17:19:23,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 1571 transitions. [2024-01-31 17:19:23,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6687952320136228 [2024-01-31 17:19:23,541 INFO L175 Difference]: Start difference. First operand has 249 places, 375 transitions, 5853 flow. Second operand 81 states and 1571 transitions. [2024-01-31 17:19:23,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 1639 transitions, 22067 flow [2024-01-31 17:19:28,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 1639 transitions, 21066 flow, removed 493 selfloop flow, removed 9 redundant places. [2024-01-31 17:19:28,308 INFO L231 Difference]: Finished difference. Result has 361 places, 828 transitions, 17220 flow [2024-01-31 17:19:28,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5448, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=330, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=17220, PETRI_PLACES=361, PETRI_TRANSITIONS=828} [2024-01-31 17:19:28,309 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 333 predicate places. [2024-01-31 17:19:28,309 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 828 transitions, 17220 flow [2024-01-31 17:19:28,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 9.407407407407407) internal successors, (254), 27 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:19:28,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:19:28,309 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:19:28,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-31 17:19:28,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-31 17:19:28,520 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:19:28,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:19:28,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1205221011, now seen corresponding path program 12 times [2024-01-31 17:19:28,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:19:28,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100301695] [2024-01-31 17:19:28,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:19:28,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:19:28,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:19:28,620 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-01-31 17:19:28,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:19:28,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100301695] [2024-01-31 17:19:28,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100301695] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:19:28,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417130930] [2024-01-31 17:19:28,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:19:28,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:19:28,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:19:28,622 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:19:28,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-31 17:19:28,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-01-31 17:19:28,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:19:28,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-31 17:19:28,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:19:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 17:19:29,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:19:29,287 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 17:19:29,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417130930] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:19:29,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:19:29,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 12] total 28 [2024-01-31 17:19:29,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836466745] [2024-01-31 17:19:29,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:19:29,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-31 17:19:29,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:19:29,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-31 17:19:29,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=586, Unknown=0, NotChecked=0, Total=812 [2024-01-31 17:19:29,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:19:29,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 828 transitions, 17220 flow. Second operand has 29 states, 29 states have (on average 10.03448275862069) internal successors, (291), 29 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:19:29,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:19:29,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:19:29,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:19:42,196 INFO L124 PetriNetUnfolderBase]: 22793/44022 cut-off events. [2024-01-31 17:19:42,197 INFO L125 PetriNetUnfolderBase]: For 705809/705809 co-relation queries the response was YES. [2024-01-31 17:19:43,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168636 conditions, 44022 events. 22793/44022 cut-off events. For 705809/705809 co-relation queries the response was YES. Maximal size of possible extension queue 1801. Compared 447840 event pairs, 5096 based on Foata normal form. 1110/37304 useless extension candidates. Maximal degree in co-relation 168492. Up to 10537 conditions per place. [2024-01-31 17:19:43,081 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 135 selfloop transitions, 216 changer transitions 339/695 dead transitions. [2024-01-31 17:19:43,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 695 transitions, 13071 flow [2024-01-31 17:19:43,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 17:19:43,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 17:19:43,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 474 transitions. [2024-01-31 17:19:43,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6053639846743295 [2024-01-31 17:19:43,083 INFO L175 Difference]: Start difference. First operand has 361 places, 828 transitions, 17220 flow. Second operand 27 states and 474 transitions. [2024-01-31 17:19:43,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 695 transitions, 13071 flow