./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/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/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 13:02:55,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 13:02:55,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 13:02:55,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 13:02:55,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 13:02:55,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 13:02:55,562 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 13:02:55,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 13:02:55,564 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 13:02:55,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 13:02:55,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 13:02:55,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 13:02:55,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 13:02:55,567 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 13:02:55,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 13:02:55,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 13:02:55,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 13:02:55,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 13:02:55,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 13:02:55,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 13:02:55,583 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 13:02:55,587 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 13:02:55,588 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 13:02:55,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 13:02:55,591 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 13:02:55,595 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 13:02:55,595 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 13:02:55,596 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 13:02:55,596 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 13:02:55,597 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 13:02:55,597 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 13:02:55,598 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 13:02:55,599 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 13:02:55,599 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 13:02:55,600 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 13:02:55,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 13:02:55,603 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 13:02:55,603 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 13:02:55,604 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 13:02:55,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 13:02:55,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 13:02:55,606 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 13:02:55,626 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 13:02:55,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 13:02:55,628 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 13:02:55,628 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 13:02:55,628 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 13:02:55,628 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 13:02:55,629 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 13:02:55,630 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 13:02:55,630 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 13:02:55,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 13:02:55,631 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 13:02:55,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 13:02:55,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 13:02:55,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 13:02:55,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 13:02:55,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 13:02:55,631 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 13:02:55,632 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 13:02:55,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 13:02:55,632 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 13:02:55,632 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 13:02:55,632 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 13:02:55,632 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 13:02:55,632 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 13:02:55,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:02:55,633 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 13:02:55,633 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 13:02:55,633 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 13:02:55,633 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 13:02:55,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 13:02:55,633 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 13:02:55,634 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 13:02:55,634 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 13:02:55,634 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 13:02:55,634 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 13:02:55,634 INFO L138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 13:02:55,862 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 13:02:55,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 13:02:55,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 13:02:55,878 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 13:02:55,878 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 13:02:55,879 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2023-09-01 13:02:57,284 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 13:02:57,427 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 13:02:57,428 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2023-09-01 13:02:57,450 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0828b31ed/d1742243e2da4608b079317f8a535d55/FLAG091f9ad37 [2023-09-01 13:02:57,461 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0828b31ed/d1742243e2da4608b079317f8a535d55 [2023-09-01 13:02:57,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 13:02:57,468 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 13:02:57,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 13:02:57,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 13:02:57,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 13:02:57,474 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:02:57" (1/1) ... [2023-09-01 13:02:57,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13e0106d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:02:57, skipping insertion in model container [2023-09-01 13:02:57,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:02:57" (1/1) ... [2023-09-01 13:02:57,480 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 13:02:57,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 13:02:57,636 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2023-09-01 13:02:57,651 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:02:57,659 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 13:02:57,684 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2023-09-01 13:02:57,695 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:02:57,706 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:02:57,706 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:02:57,725 INFO L208 MainTranslator]: Completed translation [2023-09-01 13:02:57,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:02:57 WrapperNode [2023-09-01 13:02:57,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 13:02:57,726 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 13:02:57,726 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 13:02:57,726 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 13:02:57,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:02:57" (1/1) ... [2023-09-01 13:02:57,742 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:02:57" (1/1) ... [2023-09-01 13:02:57,758 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 140 [2023-09-01 13:02:57,758 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 13:02:57,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 13:02:57,759 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 13:02:57,759 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 13:02:57,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:02:57" (1/1) ... [2023-09-01 13:02:57,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:02:57" (1/1) ... [2023-09-01 13:02:57,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:02:57" (1/1) ... [2023-09-01 13:02:57,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:02:57" (1/1) ... [2023-09-01 13:02:57,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:02:57" (1/1) ... [2023-09-01 13:02:57,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:02:57" (1/1) ... [2023-09-01 13:02:57,794 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:02:57" (1/1) ... [2023-09-01 13:02:57,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:02:57" (1/1) ... [2023-09-01 13:02:57,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 13:02:57,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 13:02:57,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 13:02:57,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 13:02:57,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:02:57" (1/1) ... [2023-09-01 13:02:57,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:02:57,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:02:57,838 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 13:02:57,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 13:02:57,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 13:02:57,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 13:02:57,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 13:02:57,933 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 13:02:57,933 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 13:02:57,933 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 13:02:57,933 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 13:02:57,933 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 13:02:57,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 13:02:57,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 13:02:57,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 13:02:57,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 13:02:57,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 13:02:57,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 13:02:57,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 13:02:57,935 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 13:02:58,039 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 13:02:58,040 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 13:02:58,209 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 13:02:58,278 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 13:02:58,278 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 13:02:58,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:02:58 BoogieIcfgContainer [2023-09-01 13:02:58,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 13:02:58,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 13:02:58,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 13:02:58,285 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 13:02:58,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:02:57" (1/3) ... [2023-09-01 13:02:58,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39fabecf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:02:58, skipping insertion in model container [2023-09-01 13:02:58,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:02:57" (2/3) ... [2023-09-01 13:02:58,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39fabecf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:02:58, skipping insertion in model container [2023-09-01 13:02:58,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:02:58" (3/3) ... [2023-09-01 13:02:58,287 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2023-09-01 13:02:58,293 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 13:02:58,299 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 13:02:58,299 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 13:02:58,299 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 13:02:58,333 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 13:02:58,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 109 transitions, 234 flow [2023-09-01 13:02:58,413 INFO L130 PetriNetUnfolder]: 9/107 cut-off events. [2023-09-01 13:02:58,413 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 13:02:58,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 107 events. 9/107 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 74. Up to 2 conditions per place. [2023-09-01 13:02:58,416 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 109 transitions, 234 flow [2023-09-01 13:02:58,419 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 99 transitions, 210 flow [2023-09-01 13:02:58,421 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 13:02:58,426 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 97 places, 99 transitions, 210 flow [2023-09-01 13:02:58,428 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 97 places, 99 transitions, 210 flow [2023-09-01 13:02:58,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 99 transitions, 210 flow [2023-09-01 13:02:58,444 INFO L130 PetriNetUnfolder]: 9/99 cut-off events. [2023-09-01 13:02:58,444 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 13:02:58,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 99 events. 9/99 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 65 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 74. Up to 2 conditions per place. [2023-09-01 13:02:58,445 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-09-01 13:03:01,100 INFO L134 LiptonReduction]: Checked pairs total: 585 [2023-09-01 13:03:01,103 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-09-01 13:03:01,135 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 13:03:01,141 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@193b9333, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 13:03:01,142 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 13:03:01,146 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-09-01 13:03:01,147 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 13:03:01,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:01,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:01,148 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:01,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:01,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1648247353, now seen corresponding path program 1 times [2023-09-01 13:03:01,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:01,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296078996] [2023-09-01 13:03:01,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:01,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:01,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:03:01,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:01,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296078996] [2023-09-01 13:03:01,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296078996] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:03:01,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:03:01,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 13:03:01,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439377736] [2023-09-01 13:03:01,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:03:01,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 13:03:01,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:01,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 13:03:01,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 13:03:01,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 206 [2023-09-01 13:03:01,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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) [2023-09-01 13:03:01,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:01,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 206 [2023-09-01 13:03:01,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:01,639 INFO L130 PetriNetUnfolder]: 66/116 cut-off events. [2023-09-01 13:03:01,639 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-09-01 13:03:01,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 116 events. 66/116 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 324 event pairs, 9 based on Foata normal form. 1/76 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-09-01 13:03:01,643 INFO L137 encePairwiseOnDemand]: 202/206 looper letters, 21 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2023-09-01 13:03:01,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 27 transitions, 125 flow [2023-09-01 13:03:01,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 13:03:01,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 13:03:01,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 311 transitions. [2023-09-01 13:03:01,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032362459546925 [2023-09-01 13:03:01,662 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 311 transitions. [2023-09-01 13:03:01,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 311 transitions. [2023-09-01 13:03:01,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:01,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 311 transitions. [2023-09-01 13:03:01,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 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) [2023-09-01 13:03:01,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 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) [2023-09-01 13:03:01,676 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 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) [2023-09-01 13:03:01,677 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 311 transitions. [2023-09-01 13:03:01,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 27 transitions, 125 flow [2023-09-01 13:03:01,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 27 transitions, 111 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 13:03:01,681 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2023-09-01 13:03:01,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2023-09-01 13:03:01,687 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-09-01 13:03:01,687 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2023-09-01 13:03:01,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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) [2023-09-01 13:03:01,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:01,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:01,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 13:03:01,691 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:01,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:01,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1272507108, now seen corresponding path program 1 times [2023-09-01 13:03:01,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:01,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9675975] [2023-09-01 13:03:01,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:01,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:01,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:03:01,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:01,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9675975] [2023-09-01 13:03:01,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9675975] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:03:01,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:03:01,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 13:03:01,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450721205] [2023-09-01 13:03:01,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:03:01,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:03:01,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:01,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:03:01,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:03:01,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 206 [2023-09-01 13:03:01,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 5 states, 5 states have (on average 89.8) internal successors, (449), 5 states have internal predecessors, (449), 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) [2023-09-01 13:03:01,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:01,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 206 [2023-09-01 13:03:01,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:01,996 INFO L130 PetriNetUnfolder]: 113/217 cut-off events. [2023-09-01 13:03:01,996 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-09-01 13:03:01,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 217 events. 113/217 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 819 event pairs, 48 based on Foata normal form. 12/227 useless extension candidates. Maximal degree in co-relation 168. Up to 122 conditions per place. [2023-09-01 13:03:01,999 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 35 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2023-09-01 13:03:01,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 194 flow [2023-09-01 13:03:01,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:03:02,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:03:02,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 471 transitions. [2023-09-01 13:03:02,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45728155339805826 [2023-09-01 13:03:02,002 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 471 transitions. [2023-09-01 13:03:02,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 471 transitions. [2023-09-01 13:03:02,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:02,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 471 transitions. [2023-09-01 13:03:02,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.2) internal successors, (471), 5 states have internal predecessors, (471), 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) [2023-09-01 13:03:02,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 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) [2023-09-01 13:03:02,007 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 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) [2023-09-01 13:03:02,007 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 5 states and 471 transitions. [2023-09-01 13:03:02,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 194 flow [2023-09-01 13:03:02,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 13:03:02,008 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 84 flow [2023-09-01 13:03:02,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=84, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-09-01 13:03:02,009 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-09-01 13:03:02,010 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 84 flow [2023-09-01 13:03:02,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.8) internal successors, (449), 5 states have internal predecessors, (449), 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) [2023-09-01 13:03:02,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:02,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:02,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 13:03:02,011 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:02,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:02,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1514912191, now seen corresponding path program 1 times [2023-09-01 13:03:02,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:02,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648285022] [2023-09-01 13:03:02,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:02,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:02,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:03:02,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:02,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648285022] [2023-09-01 13:03:02,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648285022] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:03:02,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:03:02,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 13:03:02,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684123448] [2023-09-01 13:03:02,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:03:02,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:03:02,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:02,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:03:02,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:03:02,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 206 [2023-09-01 13:03:02,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 89.8) internal successors, (449), 5 states have internal predecessors, (449), 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) [2023-09-01 13:03:02,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:02,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 206 [2023-09-01 13:03:02,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:02,195 INFO L130 PetriNetUnfolder]: 79/161 cut-off events. [2023-09-01 13:03:02,195 INFO L131 PetriNetUnfolder]: For 65/70 co-relation queries the response was YES. [2023-09-01 13:03:02,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 161 events. 79/161 cut-off events. For 65/70 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 542 event pairs, 40 based on Foata normal form. 11/170 useless extension candidates. Maximal degree in co-relation 300. Up to 116 conditions per place. [2023-09-01 13:03:02,196 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 17 selfloop transitions, 2 changer transitions 16/36 dead transitions. [2023-09-01 13:03:02,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 36 transitions, 185 flow [2023-09-01 13:03:02,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:03:02,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:03:02,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 468 transitions. [2023-09-01 13:03:02,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45436893203883494 [2023-09-01 13:03:02,198 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 468 transitions. [2023-09-01 13:03:02,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 468 transitions. [2023-09-01 13:03:02,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:02,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 468 transitions. [2023-09-01 13:03:02,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 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) [2023-09-01 13:03:02,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 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) [2023-09-01 13:03:02,202 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 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) [2023-09-01 13:03:02,202 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 84 flow. Second operand 5 states and 468 transitions. [2023-09-01 13:03:02,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 36 transitions, 185 flow [2023-09-01 13:03:02,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 36 transitions, 179 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 13:03:02,204 INFO L231 Difference]: Finished difference. Result has 31 places, 20 transitions, 74 flow [2023-09-01 13:03:02,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=74, PETRI_PLACES=31, PETRI_TRANSITIONS=20} [2023-09-01 13:03:02,204 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-09-01 13:03:02,204 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 74 flow [2023-09-01 13:03:02,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.8) internal successors, (449), 5 states have internal predecessors, (449), 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) [2023-09-01 13:03:02,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:02,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:02,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 13:03:02,205 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:02,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:02,206 INFO L85 PathProgramCache]: Analyzing trace with hash 818882596, now seen corresponding path program 1 times [2023-09-01 13:03:02,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:02,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238298367] [2023-09-01 13:03:02,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:02,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:02,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:02,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:02,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238298367] [2023-09-01 13:03:02,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238298367] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:02,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965452283] [2023-09-01 13:03:02,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:02,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:02,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:02,275 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) [2023-09-01 13:03:02,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 13:03:02,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:02,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:03:02,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:02,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:02,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:02,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965452283] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:02,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 13:03:02,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-09-01 13:03:02,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565678474] [2023-09-01 13:03:02,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:03:02,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:03:02,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:02,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:03:02,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-09-01 13:03:02,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-09-01 13:03:02,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 20 transitions, 74 flow. Second operand has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 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) [2023-09-01 13:03:02,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:02,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-09-01 13:03:02,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:02,514 INFO L130 PetriNetUnfolder]: 68/122 cut-off events. [2023-09-01 13:03:02,514 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-09-01 13:03:02,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 122 events. 68/122 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 350 event pairs, 23 based on Foata normal form. 12/133 useless extension candidates. Maximal degree in co-relation 312. Up to 92 conditions per place. [2023-09-01 13:03:02,516 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 21 selfloop transitions, 5 changer transitions 0/27 dead transitions. [2023-09-01 13:03:02,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 149 flow [2023-09-01 13:03:02,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:03:02,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:03:02,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 444 transitions. [2023-09-01 13:03:02,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43106796116504853 [2023-09-01 13:03:02,517 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 444 transitions. [2023-09-01 13:03:02,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 444 transitions. [2023-09-01 13:03:02,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:02,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 444 transitions. [2023-09-01 13:03:02,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 88.8) internal successors, (444), 5 states have internal predecessors, (444), 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) [2023-09-01 13:03:02,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 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) [2023-09-01 13:03:02,521 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 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) [2023-09-01 13:03:02,521 INFO L175 Difference]: Start difference. First operand has 31 places, 20 transitions, 74 flow. Second operand 5 states and 444 transitions. [2023-09-01 13:03:02,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 149 flow [2023-09-01 13:03:02,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 27 transitions, 133 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-09-01 13:03:02,522 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 81 flow [2023-09-01 13:03:02,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=81, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2023-09-01 13:03:02,523 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-09-01 13:03:02,523 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 81 flow [2023-09-01 13:03:02,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 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) [2023-09-01 13:03:02,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:02,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:02,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 13:03:02,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:02,729 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:02,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:02,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1062328821, now seen corresponding path program 1 times [2023-09-01 13:03:02,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:02,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051837598] [2023-09-01 13:03:02,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:02,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:02,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:02,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:02,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051837598] [2023-09-01 13:03:02,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051837598] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:02,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572078626] [2023-09-01 13:03:02,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:02,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:02,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:02,851 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) [2023-09-01 13:03:02,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 13:03:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:02,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:03:02,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:02,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:02,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:03,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572078626] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:03,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 13:03:03,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-09-01 13:03:03,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524030647] [2023-09-01 13:03:03,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:03:03,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:03:03,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:03,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:03:03,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-09-01 13:03:03,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-09-01 13:03:03,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 81 flow. Second operand has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 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) [2023-09-01 13:03:03,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:03,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-09-01 13:03:03,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:03,124 INFO L130 PetriNetUnfolder]: 52/97 cut-off events. [2023-09-01 13:03:03,125 INFO L131 PetriNetUnfolder]: For 59/66 co-relation queries the response was YES. [2023-09-01 13:03:03,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 97 events. 52/97 cut-off events. For 59/66 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 220 event pairs, 20 based on Foata normal form. 15/108 useless extension candidates. Maximal degree in co-relation 267. Up to 75 conditions per place. [2023-09-01 13:03:03,126 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 22 selfloop transitions, 5 changer transitions 0/28 dead transitions. [2023-09-01 13:03:03,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 28 transitions, 163 flow [2023-09-01 13:03:03,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:03:03,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:03:03,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 444 transitions. [2023-09-01 13:03:03,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43106796116504853 [2023-09-01 13:03:03,127 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 444 transitions. [2023-09-01 13:03:03,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 444 transitions. [2023-09-01 13:03:03,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:03,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 444 transitions. [2023-09-01 13:03:03,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 88.8) internal successors, (444), 5 states have internal predecessors, (444), 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) [2023-09-01 13:03:03,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 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) [2023-09-01 13:03:03,130 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 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) [2023-09-01 13:03:03,130 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 81 flow. Second operand 5 states and 444 transitions. [2023-09-01 13:03:03,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 28 transitions, 163 flow [2023-09-01 13:03:03,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 28 transitions, 149 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-09-01 13:03:03,131 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 91 flow [2023-09-01 13:03:03,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-09-01 13:03:03,132 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-09-01 13:03:03,132 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 91 flow [2023-09-01 13:03:03,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 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) [2023-09-01 13:03:03,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:03,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:03,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 13:03:03,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:03,336 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:03,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:03,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1690720491, now seen corresponding path program 1 times [2023-09-01 13:03:03,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:03,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231797861] [2023-09-01 13:03:03,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:03,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:03,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:03,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:03,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231797861] [2023-09-01 13:03:03,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231797861] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:03,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080205675] [2023-09-01 13:03:03,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:03,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:03,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:03,726 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) [2023-09-01 13:03:03,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 13:03:03,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:03,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 13:03:03,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:03,843 INFO L350 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 11 treesize of output 7 [2023-09-01 13:03:03,874 INFO L350 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 6 treesize of output 5 [2023-09-01 13:03:03,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:03:03,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 13:03:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:03:03,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:04,070 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))) (and (forall ((v_ArrVal_133 (Array Int Int))) (<= (+ .cse0 c_~counter~0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset))) (forall ((v_ArrVal_133 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset) (+ .cse0 c_~counter~0 1))))) is different from false [2023-09-01 13:03:04,079 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset))) (and (forall ((v_ArrVal_133 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset) (+ .cse0 c_~counter~0 1))) (forall ((v_ArrVal_133 (Array Int Int))) (<= (+ .cse0 c_~counter~0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset))))) is different from false [2023-09-01 13:03:04,098 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_133 (Array Int Int)) (v_ArrVal_132 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_132))) (<= (+ c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (forall ((v_ArrVal_133 (Array Int Int)) (v_ArrVal_132 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_132))) (< (select (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (+ c_~counter~0 (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 1))))) is different from false [2023-09-01 13:03:04,107 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:04,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 35 [2023-09-01 13:03:04,113 INFO L350 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 286 treesize of output 254 [2023-09-01 13:03:04,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 11 [2023-09-01 13:03:04,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-09-01 13:03:04,157 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:04,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-09-01 13:03:04,159 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:03:04,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2023-09-01 13:03:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-09-01 13:03:04,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080205675] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:04,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:04,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2023-09-01 13:03:04,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133575113] [2023-09-01 13:03:04,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:04,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 13:03:04,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:04,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 13:03:04,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=243, Unknown=6, NotChecked=102, Total=420 [2023-09-01 13:03:04,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-09-01 13:03:04,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 91 flow. Second operand has 21 states, 21 states have (on average 61.61904761904762) internal successors, (1294), 21 states have internal predecessors, (1294), 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) [2023-09-01 13:03:04,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:04,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-09-01 13:03:04,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:04,440 INFO L130 PetriNetUnfolder]: 110/198 cut-off events. [2023-09-01 13:03:04,440 INFO L131 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2023-09-01 13:03:04,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 198 events. 110/198 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 606 event pairs, 1 based on Foata normal form. 1/198 useless extension candidates. Maximal degree in co-relation 587. Up to 115 conditions per place. [2023-09-01 13:03:04,442 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 41 selfloop transitions, 13 changer transitions 1/55 dead transitions. [2023-09-01 13:03:04,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 55 transitions, 313 flow [2023-09-01 13:03:04,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 13:03:04,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 13:03:04,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 534 transitions. [2023-09-01 13:03:04,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32402912621359226 [2023-09-01 13:03:04,444 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 534 transitions. [2023-09-01 13:03:04,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 534 transitions. [2023-09-01 13:03:04,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:04,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 534 transitions. [2023-09-01 13:03:04,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 66.75) internal successors, (534), 8 states have internal predecessors, (534), 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) [2023-09-01 13:03:04,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 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) [2023-09-01 13:03:04,448 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 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) [2023-09-01 13:03:04,448 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 91 flow. Second operand 8 states and 534 transitions. [2023-09-01 13:03:04,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 55 transitions, 313 flow [2023-09-01 13:03:04,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 55 transitions, 301 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 13:03:04,449 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 172 flow [2023-09-01 13:03:04,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=172, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-09-01 13:03:04,450 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-09-01 13:03:04,450 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 172 flow [2023-09-01 13:03:04,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 61.61904761904762) internal successors, (1294), 21 states have internal predecessors, (1294), 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) [2023-09-01 13:03:04,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:04,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:04,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 13:03:04,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:04,656 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:04,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:04,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1211991097, now seen corresponding path program 2 times [2023-09-01 13:03:04,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:04,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741853609] [2023-09-01 13:03:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:04,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:04,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:04,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:04,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741853609] [2023-09-01 13:03:04,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741853609] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:04,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462108712] [2023-09-01 13:03:04,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:03:04,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:04,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:04,952 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) [2023-09-01 13:03:04,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 13:03:05,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:03:05,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:03:05,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 13:03:05,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:05,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:05,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:05,186 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:05,187 INFO L350 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 22 treesize of output 15 [2023-09-01 13:03:05,196 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:03:05,197 INFO L350 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 21 treesize of output 10 [2023-09-01 13:03:05,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:05,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462108712] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:05,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:05,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-09-01 13:03:05,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994111665] [2023-09-01 13:03:05,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:05,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 13:03:05,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:05,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 13:03:05,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-09-01 13:03:05,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-09-01 13:03:05,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 172 flow. Second operand has 11 states, 11 states have (on average 86.81818181818181) internal successors, (955), 11 states have internal predecessors, (955), 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) [2023-09-01 13:03:05,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:05,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-09-01 13:03:05,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:05,487 INFO L130 PetriNetUnfolder]: 137/246 cut-off events. [2023-09-01 13:03:05,488 INFO L131 PetriNetUnfolder]: For 273/273 co-relation queries the response was YES. [2023-09-01 13:03:05,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 892 conditions, 246 events. 137/246 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 782 event pairs, 25 based on Foata normal form. 1/246 useless extension candidates. Maximal degree in co-relation 868. Up to 190 conditions per place. [2023-09-01 13:03:05,490 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 41 selfloop transitions, 13 changer transitions 1/55 dead transitions. [2023-09-01 13:03:05,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 55 transitions, 387 flow [2023-09-01 13:03:05,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:03:05,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:03:05,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 633 transitions. [2023-09-01 13:03:05,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4389736477115118 [2023-09-01 13:03:05,492 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 633 transitions. [2023-09-01 13:03:05,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 633 transitions. [2023-09-01 13:03:05,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:05,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 633 transitions. [2023-09-01 13:03:05,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.42857142857143) internal successors, (633), 7 states have internal predecessors, (633), 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) [2023-09-01 13:03:05,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 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) [2023-09-01 13:03:05,496 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 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) [2023-09-01 13:03:05,496 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 172 flow. Second operand 7 states and 633 transitions. [2023-09-01 13:03:05,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 55 transitions, 387 flow [2023-09-01 13:03:05,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 55 transitions, 362 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-09-01 13:03:05,500 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 266 flow [2023-09-01 13:03:05,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=266, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-09-01 13:03:05,500 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-09-01 13:03:05,501 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 266 flow [2023-09-01 13:03:05,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 86.81818181818181) internal successors, (955), 11 states have internal predecessors, (955), 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) [2023-09-01 13:03:05,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:05,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:05,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 13:03:05,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:05,707 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:05,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:05,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1666552779, now seen corresponding path program 3 times [2023-09-01 13:03:05,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:05,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736331891] [2023-09-01 13:03:05,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:05,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:05,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:05,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:05,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736331891] [2023-09-01 13:03:05,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736331891] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:05,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167039265] [2023-09-01 13:03:05,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:03:05,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:05,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:05,962 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) [2023-09-01 13:03:05,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 13:03:06,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:03:06,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:03:06,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 13:03:06,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:06,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:06,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:06,126 INFO L350 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 22 treesize of output 15 [2023-09-01 13:03:06,134 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:03:06,134 INFO L350 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 21 treesize of output 10 [2023-09-01 13:03:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:06,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167039265] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:06,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:06,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-09-01 13:03:06,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528220235] [2023-09-01 13:03:06,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:06,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 13:03:06,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:06,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 13:03:06,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-09-01 13:03:06,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-09-01 13:03:06,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 266 flow. Second operand has 11 states, 11 states have (on average 86.63636363636364) internal successors, (953), 11 states have internal predecessors, (953), 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) [2023-09-01 13:03:06,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:06,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-09-01 13:03:06,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:06,433 INFO L130 PetriNetUnfolder]: 159/285 cut-off events. [2023-09-01 13:03:06,433 INFO L131 PetriNetUnfolder]: For 475/475 co-relation queries the response was YES. [2023-09-01 13:03:06,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1115 conditions, 285 events. 159/285 cut-off events. For 475/475 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 960 event pairs, 33 based on Foata normal form. 1/285 useless extension candidates. Maximal degree in co-relation 1087. Up to 233 conditions per place. [2023-09-01 13:03:06,435 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 45 selfloop transitions, 14 changer transitions 1/60 dead transitions. [2023-09-01 13:03:06,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 60 transitions, 470 flow [2023-09-01 13:03:06,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:03:06,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:03:06,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 633 transitions. [2023-09-01 13:03:06,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4389736477115118 [2023-09-01 13:03:06,437 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 633 transitions. [2023-09-01 13:03:06,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 633 transitions. [2023-09-01 13:03:06,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:06,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 633 transitions. [2023-09-01 13:03:06,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.42857142857143) internal successors, (633), 7 states have internal predecessors, (633), 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) [2023-09-01 13:03:06,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 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) [2023-09-01 13:03:06,441 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 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) [2023-09-01 13:03:06,441 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 266 flow. Second operand 7 states and 633 transitions. [2023-09-01 13:03:06,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 60 transitions, 470 flow [2023-09-01 13:03:06,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 60 transitions, 449 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 13:03:06,444 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 339 flow [2023-09-01 13:03:06,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=339, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-09-01 13:03:06,444 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2023-09-01 13:03:06,444 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 339 flow [2023-09-01 13:03:06,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 86.63636363636364) internal successors, (953), 11 states have internal predecessors, (953), 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) [2023-09-01 13:03:06,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:06,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:06,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 13:03:06,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:06,651 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:06,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:06,651 INFO L85 PathProgramCache]: Analyzing trace with hash -2131943909, now seen corresponding path program 4 times [2023-09-01 13:03:06,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:06,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167760926] [2023-09-01 13:03:06,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:06,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:06,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:06,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:06,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167760926] [2023-09-01 13:03:06,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167760926] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:06,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519456766] [2023-09-01 13:03:06,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:03:06,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:06,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:06,868 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) [2023-09-01 13:03:06,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 13:03:06,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:03:06,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:03:06,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 13:03:06,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:07,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:07,053 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:07,053 INFO L350 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 22 treesize of output 15 [2023-09-01 13:03:07,061 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:03:07,061 INFO L350 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 21 treesize of output 10 [2023-09-01 13:03:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:07,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519456766] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:07,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:07,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-09-01 13:03:07,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779684074] [2023-09-01 13:03:07,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:07,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 13:03:07,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:07,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 13:03:07,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-09-01 13:03:07,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-09-01 13:03:07,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 339 flow. Second operand has 11 states, 11 states have (on average 86.63636363636364) internal successors, (953), 11 states have internal predecessors, (953), 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) [2023-09-01 13:03:07,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:07,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-09-01 13:03:07,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:07,338 INFO L130 PetriNetUnfolder]: 175/314 cut-off events. [2023-09-01 13:03:07,338 INFO L131 PetriNetUnfolder]: For 689/689 co-relation queries the response was YES. [2023-09-01 13:03:07,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1280 conditions, 314 events. 175/314 cut-off events. For 689/689 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1103 event pairs, 37 based on Foata normal form. 1/314 useless extension candidates. Maximal degree in co-relation 1248. Up to 258 conditions per place. [2023-09-01 13:03:07,340 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 50 selfloop transitions, 14 changer transitions 1/65 dead transitions. [2023-09-01 13:03:07,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 547 flow [2023-09-01 13:03:07,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:03:07,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:03:07,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 635 transitions. [2023-09-01 13:03:07,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403606102635229 [2023-09-01 13:03:07,343 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 635 transitions. [2023-09-01 13:03:07,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 635 transitions. [2023-09-01 13:03:07,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:07,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 635 transitions. [2023-09-01 13:03:07,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.71428571428571) internal successors, (635), 7 states have internal predecessors, (635), 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) [2023-09-01 13:03:07,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 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) [2023-09-01 13:03:07,346 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 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) [2023-09-01 13:03:07,347 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 339 flow. Second operand 7 states and 635 transitions. [2023-09-01 13:03:07,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 547 flow [2023-09-01 13:03:07,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 65 transitions, 516 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-09-01 13:03:07,350 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 383 flow [2023-09-01 13:03:07,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=383, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2023-09-01 13:03:07,351 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 36 predicate places. [2023-09-01 13:03:07,351 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 383 flow [2023-09-01 13:03:07,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 86.63636363636364) internal successors, (953), 11 states have internal predecessors, (953), 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) [2023-09-01 13:03:07,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:07,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:07,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 13:03:07,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:07,557 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:07,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:07,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1333660907, now seen corresponding path program 5 times [2023-09-01 13:03:07,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:07,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409136932] [2023-09-01 13:03:07,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:07,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:07,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:07,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409136932] [2023-09-01 13:03:07,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409136932] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:07,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134118332] [2023-09-01 13:03:07,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:03:07,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:07,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:07,814 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) [2023-09-01 13:03:07,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 13:03:07,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:03:07,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:03:07,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 13:03:07,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:07,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:08,024 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:08,024 INFO L350 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 22 treesize of output 15 [2023-09-01 13:03:08,034 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:03:08,034 INFO L350 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 21 treesize of output 10 [2023-09-01 13:03:08,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:08,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134118332] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:08,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:08,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-09-01 13:03:08,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967112004] [2023-09-01 13:03:08,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:08,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 13:03:08,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:08,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 13:03:08,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-09-01 13:03:08,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-09-01 13:03:08,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 383 flow. Second operand has 11 states, 11 states have (on average 86.63636363636364) internal successors, (953), 11 states have internal predecessors, (953), 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) [2023-09-01 13:03:08,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:08,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-09-01 13:03:08,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:08,359 INFO L130 PetriNetUnfolder]: 197/353 cut-off events. [2023-09-01 13:03:08,359 INFO L131 PetriNetUnfolder]: For 1017/1017 co-relation queries the response was YES. [2023-09-01 13:03:08,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490 conditions, 353 events. 197/353 cut-off events. For 1017/1017 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1295 event pairs, 49 based on Foata normal form. 1/353 useless extension candidates. Maximal degree in co-relation 1455. Up to 301 conditions per place. [2023-09-01 13:03:08,361 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 50 selfloop transitions, 14 changer transitions 1/65 dead transitions. [2023-09-01 13:03:08,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 596 flow [2023-09-01 13:03:08,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:03:08,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:03:08,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 631 transitions. [2023-09-01 13:03:08,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375866851595007 [2023-09-01 13:03:08,363 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 631 transitions. [2023-09-01 13:03:08,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 631 transitions. [2023-09-01 13:03:08,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:08,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 631 transitions. [2023-09-01 13:03:08,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.14285714285714) internal successors, (631), 7 states have internal predecessors, (631), 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) [2023-09-01 13:03:08,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 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) [2023-09-01 13:03:08,366 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 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) [2023-09-01 13:03:08,366 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 383 flow. Second operand 7 states and 631 transitions. [2023-09-01 13:03:08,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 596 flow [2023-09-01 13:03:08,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 65 transitions, 554 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-09-01 13:03:08,370 INFO L231 Difference]: Finished difference. Result has 61 places, 52 transitions, 431 flow [2023-09-01 13:03:08,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=431, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2023-09-01 13:03:08,370 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 40 predicate places. [2023-09-01 13:03:08,370 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 431 flow [2023-09-01 13:03:08,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 86.63636363636364) internal successors, (953), 11 states have internal predecessors, (953), 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) [2023-09-01 13:03:08,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:08,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:08,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 13:03:08,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:08,571 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:08,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:08,572 INFO L85 PathProgramCache]: Analyzing trace with hash 448505845, now seen corresponding path program 6 times [2023-09-01 13:03:08,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:08,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761039077] [2023-09-01 13:03:08,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:08,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:08,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:08,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761039077] [2023-09-01 13:03:08,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761039077] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:08,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058902986] [2023-09-01 13:03:08,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:03:08,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:08,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:08,745 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) [2023-09-01 13:03:08,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 13:03:08,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 13:03:08,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:03:08,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 13:03:08,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:08,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:08,944 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:08,944 INFO L350 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 17 treesize of output 14 [2023-09-01 13:03:08,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:08,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058902986] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:08,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:08,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-09-01 13:03:08,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397114837] [2023-09-01 13:03:08,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:08,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 13:03:08,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:08,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 13:03:08,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-09-01 13:03:09,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-09-01 13:03:09,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 52 transitions, 431 flow. Second operand has 11 states, 11 states have (on average 86.63636363636364) internal successors, (953), 11 states have internal predecessors, (953), 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) [2023-09-01 13:03:09,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:09,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-09-01 13:03:09,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:09,285 INFO L130 PetriNetUnfolder]: 225/402 cut-off events. [2023-09-01 13:03:09,285 INFO L131 PetriNetUnfolder]: For 1259/1259 co-relation queries the response was YES. [2023-09-01 13:03:09,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1719 conditions, 402 events. 225/402 cut-off events. For 1259/1259 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1520 event pairs, 43 based on Foata normal form. 1/402 useless extension candidates. Maximal degree in co-relation 1682. Up to 330 conditions per place. [2023-09-01 13:03:09,288 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 52 selfloop transitions, 19 changer transitions 1/72 dead transitions. [2023-09-01 13:03:09,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 72 transitions, 692 flow [2023-09-01 13:03:09,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:03:09,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:03:09,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 633 transitions. [2023-09-01 13:03:09,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4389736477115118 [2023-09-01 13:03:09,290 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 633 transitions. [2023-09-01 13:03:09,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 633 transitions. [2023-09-01 13:03:09,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:09,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 633 transitions. [2023-09-01 13:03:09,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.42857142857143) internal successors, (633), 7 states have internal predecessors, (633), 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) [2023-09-01 13:03:09,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 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) [2023-09-01 13:03:09,294 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 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) [2023-09-01 13:03:09,295 INFO L175 Difference]: Start difference. First operand has 61 places, 52 transitions, 431 flow. Second operand 7 states and 633 transitions. [2023-09-01 13:03:09,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 72 transitions, 692 flow [2023-09-01 13:03:09,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 72 transitions, 645 flow, removed 17 selfloop flow, removed 3 redundant places. [2023-09-01 13:03:09,302 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 525 flow [2023-09-01 13:03:09,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=525, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2023-09-01 13:03:09,303 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 46 predicate places. [2023-09-01 13:03:09,303 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 525 flow [2023-09-01 13:03:09,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 86.63636363636364) internal successors, (953), 11 states have internal predecessors, (953), 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) [2023-09-01 13:03:09,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:09,304 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:09,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 13:03:09,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-09-01 13:03:09,509 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:09,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:09,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2097028727, now seen corresponding path program 7 times [2023-09-01 13:03:09,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:09,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863627903] [2023-09-01 13:03:09,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:09,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:09,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:09,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:09,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863627903] [2023-09-01 13:03:09,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863627903] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:09,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305901883] [2023-09-01 13:03:09,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:03:09,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:09,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:09,593 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) [2023-09-01 13:03:09,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 13:03:09,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:09,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:03:09,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:09,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:09,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:09,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305901883] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:09,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:09,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-09-01 13:03:09,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775180583] [2023-09-01 13:03:09,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:09,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 13:03:09,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:09,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 13:03:09,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-09-01 13:03:09,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-09-01 13:03:09,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 525 flow. Second operand has 14 states, 14 states have (on average 86.42857142857143) internal successors, (1210), 14 states have internal predecessors, (1210), 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) [2023-09-01 13:03:09,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:09,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-09-01 13:03:09,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:10,064 INFO L130 PetriNetUnfolder]: 371/695 cut-off events. [2023-09-01 13:03:10,064 INFO L131 PetriNetUnfolder]: For 2658/2690 co-relation queries the response was YES. [2023-09-01 13:03:10,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2961 conditions, 695 events. 371/695 cut-off events. For 2658/2690 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3427 event pairs, 86 based on Foata normal form. 57/743 useless extension candidates. Maximal degree in co-relation 2560. Up to 275 conditions per place. [2023-09-01 13:03:10,069 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 103 selfloop transitions, 16 changer transitions 0/123 dead transitions. [2023-09-01 13:03:10,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 123 transitions, 1289 flow [2023-09-01 13:03:10,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 13:03:10,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 13:03:10,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 720 transitions. [2023-09-01 13:03:10,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4368932038834951 [2023-09-01 13:03:10,072 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 720 transitions. [2023-09-01 13:03:10,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 720 transitions. [2023-09-01 13:03:10,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:10,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 720 transitions. [2023-09-01 13:03:10,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 90.0) internal successors, (720), 8 states have internal predecessors, (720), 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) [2023-09-01 13:03:10,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 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) [2023-09-01 13:03:10,076 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 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) [2023-09-01 13:03:10,076 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 525 flow. Second operand 8 states and 720 transitions. [2023-09-01 13:03:10,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 123 transitions, 1289 flow [2023-09-01 13:03:10,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 123 transitions, 1168 flow, removed 52 selfloop flow, removed 2 redundant places. [2023-09-01 13:03:10,088 INFO L231 Difference]: Finished difference. Result has 77 places, 72 transitions, 694 flow [2023-09-01 13:03:10,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=694, PETRI_PLACES=77, PETRI_TRANSITIONS=72} [2023-09-01 13:03:10,088 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 56 predicate places. [2023-09-01 13:03:10,089 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 72 transitions, 694 flow [2023-09-01 13:03:10,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 86.42857142857143) internal successors, (1210), 14 states have internal predecessors, (1210), 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) [2023-09-01 13:03:10,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:10,089 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:10,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 13:03:10,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:10,296 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:10,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:10,297 INFO L85 PathProgramCache]: Analyzing trace with hash 559731294, now seen corresponding path program 8 times [2023-09-01 13:03:10,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:10,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945244302] [2023-09-01 13:03:10,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:10,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:10,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:03:10,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:10,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945244302] [2023-09-01 13:03:10,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945244302] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:10,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356469988] [2023-09-01 13:03:10,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:03:10,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:10,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:10,366 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) [2023-09-01 13:03:10,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 13:03:10,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:03:10,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:03:10,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:03:10,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:10,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:03:10,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:03:10,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356469988] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:10,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:10,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-09-01 13:03:10,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573732910] [2023-09-01 13:03:10,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:10,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 13:03:10,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:10,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 13:03:10,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-09-01 13:03:10,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-09-01 13:03:10,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 72 transitions, 694 flow. Second operand has 14 states, 14 states have (on average 86.14285714285714) internal successors, (1206), 14 states have internal predecessors, (1206), 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) [2023-09-01 13:03:10,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:10,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-09-01 13:03:10,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:10,801 INFO L130 PetriNetUnfolder]: 305/610 cut-off events. [2023-09-01 13:03:10,801 INFO L131 PetriNetUnfolder]: For 1858/1889 co-relation queries the response was YES. [2023-09-01 13:03:10,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2627 conditions, 610 events. 305/610 cut-off events. For 1858/1889 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3090 event pairs, 89 based on Foata normal form. 65/674 useless extension candidates. Maximal degree in co-relation 2329. Up to 251 conditions per place. [2023-09-01 13:03:10,804 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 66 selfloop transitions, 4 changer transitions 36/110 dead transitions. [2023-09-01 13:03:10,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 110 transitions, 1137 flow [2023-09-01 13:03:10,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 13:03:10,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 13:03:10,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 719 transitions. [2023-09-01 13:03:10,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4362864077669903 [2023-09-01 13:03:10,806 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 719 transitions. [2023-09-01 13:03:10,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 719 transitions. [2023-09-01 13:03:10,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:10,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 719 transitions. [2023-09-01 13:03:10,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 89.875) internal successors, (719), 8 states have internal predecessors, (719), 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) [2023-09-01 13:03:10,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 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) [2023-09-01 13:03:10,810 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 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) [2023-09-01 13:03:10,810 INFO L175 Difference]: Start difference. First operand has 77 places, 72 transitions, 694 flow. Second operand 8 states and 719 transitions. [2023-09-01 13:03:10,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 110 transitions, 1137 flow [2023-09-01 13:03:10,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 110 transitions, 1129 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-09-01 13:03:10,817 INFO L231 Difference]: Finished difference. Result has 86 places, 59 transitions, 567 flow [2023-09-01 13:03:10,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=567, PETRI_PLACES=86, PETRI_TRANSITIONS=59} [2023-09-01 13:03:10,817 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2023-09-01 13:03:10,817 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 59 transitions, 567 flow [2023-09-01 13:03:10,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 86.14285714285714) internal successors, (1206), 14 states have internal predecessors, (1206), 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) [2023-09-01 13:03:10,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:10,818 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:10,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 13:03:11,022 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,SelfDestructingSolverStorable12 [2023-09-01 13:03:11,023 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:11,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:11,024 INFO L85 PathProgramCache]: Analyzing trace with hash 650633796, now seen corresponding path program 9 times [2023-09-01 13:03:11,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:11,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535640996] [2023-09-01 13:03:11,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:11,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:11,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:11,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535640996] [2023-09-01 13:03:11,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535640996] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:11,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669330323] [2023-09-01 13:03:11,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:03:11,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:11,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:11,094 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) [2023-09-01 13:03:11,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 13:03:11,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:03:11,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:03:11,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:03:11,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:11,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:11,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669330323] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:11,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:11,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-09-01 13:03:11,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380913625] [2023-09-01 13:03:11,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:11,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 13:03:11,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:11,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 13:03:11,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-09-01 13:03:11,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-09-01 13:03:11,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 59 transitions, 567 flow. Second operand has 14 states, 14 states have (on average 86.14285714285714) internal successors, (1206), 14 states have internal predecessors, (1206), 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) [2023-09-01 13:03:11,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:11,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-09-01 13:03:11,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:11,512 INFO L130 PetriNetUnfolder]: 166/297 cut-off events. [2023-09-01 13:03:11,512 INFO L131 PetriNetUnfolder]: For 1555/1562 co-relation queries the response was YES. [2023-09-01 13:03:11,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1611 conditions, 297 events. 166/297 cut-off events. For 1555/1562 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1041 event pairs, 28 based on Foata normal form. 51/347 useless extension candidates. Maximal degree in co-relation 1552. Up to 139 conditions per place. [2023-09-01 13:03:11,514 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 41 selfloop transitions, 25 changer transitions 0/70 dead transitions. [2023-09-01 13:03:11,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 70 transitions, 785 flow [2023-09-01 13:03:11,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:03:11,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:03:11,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 619 transitions. [2023-09-01 13:03:11,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292649098474341 [2023-09-01 13:03:11,516 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 619 transitions. [2023-09-01 13:03:11,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 619 transitions. [2023-09-01 13:03:11,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:11,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 619 transitions. [2023-09-01 13:03:11,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 88.42857142857143) internal successors, (619), 7 states have internal predecessors, (619), 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) [2023-09-01 13:03:11,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 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) [2023-09-01 13:03:11,519 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 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) [2023-09-01 13:03:11,519 INFO L175 Difference]: Start difference. First operand has 86 places, 59 transitions, 567 flow. Second operand 7 states and 619 transitions. [2023-09-01 13:03:11,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 70 transitions, 785 flow [2023-09-01 13:03:11,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 70 transitions, 630 flow, removed 69 selfloop flow, removed 11 redundant places. [2023-09-01 13:03:11,527 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 510 flow [2023-09-01 13:03:11,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=510, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-09-01 13:03:11,527 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 55 predicate places. [2023-09-01 13:03:11,527 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 510 flow [2023-09-01 13:03:11,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 86.14285714285714) internal successors, (1206), 14 states have internal predecessors, (1206), 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) [2023-09-01 13:03:11,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:11,528 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:11,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-09-01 13:03:11,732 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,SelfDestructingSolverStorable13 [2023-09-01 13:03:11,733 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:11,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:11,733 INFO L85 PathProgramCache]: Analyzing trace with hash -937838569, now seen corresponding path program 10 times [2023-09-01 13:03:11,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:11,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874703705] [2023-09-01 13:03:11,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:11,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:11,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:11,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:11,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874703705] [2023-09-01 13:03:11,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874703705] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:11,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000281489] [2023-09-01 13:03:11,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:03:11,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:11,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:11,802 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) [2023-09-01 13:03:11,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 13:03:11,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:03:11,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:03:11,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:03:11,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:11,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:11,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:11,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000281489] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:11,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:11,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-09-01 13:03:11,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439490286] [2023-09-01 13:03:11,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:11,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 13:03:11,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:11,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 13:03:11,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-09-01 13:03:12,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-09-01 13:03:12,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 60 transitions, 510 flow. Second operand has 14 states, 14 states have (on average 86.14285714285714) internal successors, (1206), 14 states have internal predecessors, (1206), 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) [2023-09-01 13:03:12,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:12,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-09-01 13:03:12,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:12,165 INFO L130 PetriNetUnfolder]: 120/214 cut-off events. [2023-09-01 13:03:12,165 INFO L131 PetriNetUnfolder]: For 1305/1311 co-relation queries the response was YES. [2023-09-01 13:03:12,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1218 conditions, 214 events. 120/214 cut-off events. For 1305/1311 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 643 event pairs, 27 based on Foata normal form. 30/239 useless extension candidates. Maximal degree in co-relation 1167. Up to 118 conditions per place. [2023-09-01 13:03:12,167 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 42 selfloop transitions, 25 changer transitions 0/71 dead transitions. [2023-09-01 13:03:12,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 71 transitions, 730 flow [2023-09-01 13:03:12,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:03:12,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:03:12,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 619 transitions. [2023-09-01 13:03:12,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292649098474341 [2023-09-01 13:03:12,169 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 619 transitions. [2023-09-01 13:03:12,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 619 transitions. [2023-09-01 13:03:12,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:12,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 619 transitions. [2023-09-01 13:03:12,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 88.42857142857143) internal successors, (619), 7 states have internal predecessors, (619), 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) [2023-09-01 13:03:12,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 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) [2023-09-01 13:03:12,172 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 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) [2023-09-01 13:03:12,172 INFO L175 Difference]: Start difference. First operand has 76 places, 60 transitions, 510 flow. Second operand 7 states and 619 transitions. [2023-09-01 13:03:12,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 71 transitions, 730 flow [2023-09-01 13:03:12,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 71 transitions, 648 flow, removed 25 selfloop flow, removed 5 redundant places. [2023-09-01 13:03:12,176 INFO L231 Difference]: Finished difference. Result has 78 places, 61 transitions, 522 flow [2023-09-01 13:03:12,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=522, PETRI_PLACES=78, PETRI_TRANSITIONS=61} [2023-09-01 13:03:12,176 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 57 predicate places. [2023-09-01 13:03:12,176 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 61 transitions, 522 flow [2023-09-01 13:03:12,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 86.14285714285714) internal successors, (1206), 14 states have internal predecessors, (1206), 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) [2023-09-01 13:03:12,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:12,177 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:12,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 13:03:12,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 13:03:12,382 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:12,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:12,382 INFO L85 PathProgramCache]: Analyzing trace with hash -603236243, now seen corresponding path program 11 times [2023-09-01 13:03:12,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:12,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773597670] [2023-09-01 13:03:12,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:12,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:12,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:03:13,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:13,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773597670] [2023-09-01 13:03:13,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773597670] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:13,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408878894] [2023-09-01 13:03:13,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:03:13,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:13,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:13,071 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:03:13,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 13:03:13,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:03:13,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:03:13,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 78 conjunts are in the unsatisfiable core [2023-09-01 13:03:13,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:13,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:03:13,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-09-01 13:03:13,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:13,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:13,515 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_446 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_446) c_~A~0.base))) (+ (select .cse0 .cse1) (select .cse0 c_~A~0.offset))) (+ c_~counter~0 1))) (forall ((v_ArrVal_446 (Array Int Int))) (<= c_~counter~0 (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_446) c_~A~0.base))) (+ (select .cse2 .cse1) (select .cse2 c_~A~0.offset))))))) is different from false [2023-09-01 13:03:13,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:13,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 68 [2023-09-01 13:03:13,595 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:13,596 INFO L350 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 19 treesize of output 13 [2023-09-01 13:03:13,640 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:03:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:13,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408878894] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:13,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:13,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 29 [2023-09-01 13:03:13,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917332109] [2023-09-01 13:03:13,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:13,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 13:03:13,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:13,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 13:03:13,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=763, Unknown=5, NotChecked=56, Total=930 [2023-09-01 13:03:13,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-09-01 13:03:13,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 61 transitions, 522 flow. Second operand has 31 states, 31 states have (on average 54.645161290322584) internal successors, (1694), 31 states have internal predecessors, (1694), 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) [2023-09-01 13:03:13,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:13,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-09-01 13:03:13,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:14,536 INFO L130 PetriNetUnfolder]: 182/321 cut-off events. [2023-09-01 13:03:14,536 INFO L131 PetriNetUnfolder]: For 1826/1826 co-relation queries the response was YES. [2023-09-01 13:03:14,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1810 conditions, 321 events. 182/321 cut-off events. For 1826/1826 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1066 event pairs, 11 based on Foata normal form. 1/321 useless extension candidates. Maximal degree in co-relation 1758. Up to 187 conditions per place. [2023-09-01 13:03:14,538 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 65 selfloop transitions, 40 changer transitions 1/106 dead transitions. [2023-09-01 13:03:14,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 106 transitions, 991 flow [2023-09-01 13:03:14,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 13:03:14,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 13:03:14,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 930 transitions. [2023-09-01 13:03:14,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2821601941747573 [2023-09-01 13:03:14,543 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 930 transitions. [2023-09-01 13:03:14,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 930 transitions. [2023-09-01 13:03:14,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:14,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 930 transitions. [2023-09-01 13:03:14,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 58.125) internal successors, (930), 16 states have internal predecessors, (930), 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) [2023-09-01 13:03:14,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 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) [2023-09-01 13:03:14,567 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 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) [2023-09-01 13:03:14,567 INFO L175 Difference]: Start difference. First operand has 78 places, 61 transitions, 522 flow. Second operand 16 states and 930 transitions. [2023-09-01 13:03:14,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 106 transitions, 991 flow [2023-09-01 13:03:14,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 106 transitions, 924 flow, removed 17 selfloop flow, removed 5 redundant places. [2023-09-01 13:03:14,573 INFO L231 Difference]: Finished difference. Result has 92 places, 73 transitions, 726 flow [2023-09-01 13:03:14,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=726, PETRI_PLACES=92, PETRI_TRANSITIONS=73} [2023-09-01 13:03:14,574 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 71 predicate places. [2023-09-01 13:03:14,574 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 73 transitions, 726 flow [2023-09-01 13:03:14,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 54.645161290322584) internal successors, (1694), 31 states have internal predecessors, (1694), 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) [2023-09-01 13:03:14,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:14,574 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:14,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-09-01 13:03:14,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 13:03:14,779 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:14,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:14,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1564132795, now seen corresponding path program 12 times [2023-09-01 13:03:14,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:14,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925023230] [2023-09-01 13:03:14,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:14,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:15,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:15,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:15,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925023230] [2023-09-01 13:03:15,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925023230] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:15,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796985192] [2023-09-01 13:03:15,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:03:15,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:15,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:15,149 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:03:15,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 13:03:15,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 13:03:15,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:03:15,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-09-01 13:03:15,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:15,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:15,496 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:15,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 44 [2023-09-01 13:03:15,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:15,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796985192] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:15,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:15,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 13 [2023-09-01 13:03:15,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744151857] [2023-09-01 13:03:15,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:15,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 13:03:15,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:15,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 13:03:15,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-09-01 13:03:15,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-09-01 13:03:15,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 73 transitions, 726 flow. Second operand has 15 states, 15 states have (on average 86.2) internal successors, (1293), 15 states have internal predecessors, (1293), 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) [2023-09-01 13:03:15,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:15,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-09-01 13:03:15,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:16,262 INFO L130 PetriNetUnfolder]: 270/480 cut-off events. [2023-09-01 13:03:16,262 INFO L131 PetriNetUnfolder]: For 2957/2957 co-relation queries the response was YES. [2023-09-01 13:03:16,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2826 conditions, 480 events. 270/480 cut-off events. For 2957/2957 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1797 event pairs, 29 based on Foata normal form. 2/481 useless extension candidates. Maximal degree in co-relation 2770. Up to 317 conditions per place. [2023-09-01 13:03:16,266 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 95 selfloop transitions, 39 changer transitions 2/136 dead transitions. [2023-09-01 13:03:16,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 136 transitions, 1436 flow [2023-09-01 13:03:16,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 13:03:16,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 13:03:16,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1266 transitions. [2023-09-01 13:03:16,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4389736477115118 [2023-09-01 13:03:16,268 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1266 transitions. [2023-09-01 13:03:16,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1266 transitions. [2023-09-01 13:03:16,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:16,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1266 transitions. [2023-09-01 13:03:16,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 90.42857142857143) internal successors, (1266), 14 states have internal predecessors, (1266), 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) [2023-09-01 13:03:16,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 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) [2023-09-01 13:03:16,273 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 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) [2023-09-01 13:03:16,273 INFO L175 Difference]: Start difference. First operand has 92 places, 73 transitions, 726 flow. Second operand 14 states and 1266 transitions. [2023-09-01 13:03:16,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 136 transitions, 1436 flow [2023-09-01 13:03:16,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 136 transitions, 1295 flow, removed 41 selfloop flow, removed 10 redundant places. [2023-09-01 13:03:16,284 INFO L231 Difference]: Finished difference. Result has 102 places, 93 transitions, 1004 flow [2023-09-01 13:03:16,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1004, PETRI_PLACES=102, PETRI_TRANSITIONS=93} [2023-09-01 13:03:16,284 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 81 predicate places. [2023-09-01 13:03:16,284 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 93 transitions, 1004 flow [2023-09-01 13:03:16,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 86.2) internal successors, (1293), 15 states have internal predecessors, (1293), 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) [2023-09-01 13:03:16,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:16,285 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:16,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 13:03:16,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:16,495 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:16,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:16,496 INFO L85 PathProgramCache]: Analyzing trace with hash -701418181, now seen corresponding path program 13 times [2023-09-01 13:03:16,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:16,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013077161] [2023-09-01 13:03:16,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:16,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:03:17,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:17,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013077161] [2023-09-01 13:03:17,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013077161] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:17,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787462879] [2023-09-01 13:03:17,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:03:17,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:17,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:17,063 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:03:17,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 13:03:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:17,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-09-01 13:03:17,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:17,270 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:03:17,272 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:17,272 INFO L350 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 31 treesize of output 14 [2023-09-01 13:03:17,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:17,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:17,405 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:17,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 44 [2023-09-01 13:03:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:17,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787462879] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:17,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:17,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 18 [2023-09-01 13:03:17,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898475493] [2023-09-01 13:03:17,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:17,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 13:03:17,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:17,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 13:03:17,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-09-01 13:03:17,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 206 [2023-09-01 13:03:17,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 93 transitions, 1004 flow. Second operand has 20 states, 20 states have (on average 79.1) internal successors, (1582), 20 states have internal predecessors, (1582), 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) [2023-09-01 13:03:17,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:17,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 206 [2023-09-01 13:03:17,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:18,397 INFO L130 PetriNetUnfolder]: 302/538 cut-off events. [2023-09-01 13:03:18,397 INFO L131 PetriNetUnfolder]: For 3569/3569 co-relation queries the response was YES. [2023-09-01 13:03:18,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3205 conditions, 538 events. 302/538 cut-off events. For 3569/3569 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2082 event pairs, 47 based on Foata normal form. 2/539 useless extension candidates. Maximal degree in co-relation 3144. Up to 408 conditions per place. [2023-09-01 13:03:18,401 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 96 selfloop transitions, 35 changer transitions 2/133 dead transitions. [2023-09-01 13:03:18,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 133 transitions, 1484 flow [2023-09-01 13:03:18,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 13:03:18,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 13:03:18,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1317 transitions. [2023-09-01 13:03:18,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3995752427184466 [2023-09-01 13:03:18,403 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1317 transitions. [2023-09-01 13:03:18,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1317 transitions. [2023-09-01 13:03:18,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:18,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1317 transitions. [2023-09-01 13:03:18,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 82.3125) internal successors, (1317), 16 states have internal predecessors, (1317), 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) [2023-09-01 13:03:18,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 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) [2023-09-01 13:03:18,408 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 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) [2023-09-01 13:03:18,408 INFO L175 Difference]: Start difference. First operand has 102 places, 93 transitions, 1004 flow. Second operand 16 states and 1317 transitions. [2023-09-01 13:03:18,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 133 transitions, 1484 flow [2023-09-01 13:03:18,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 133 transitions, 1329 flow, removed 71 selfloop flow, removed 3 redundant places. [2023-09-01 13:03:18,418 INFO L231 Difference]: Finished difference. Result has 116 places, 97 transitions, 1013 flow [2023-09-01 13:03:18,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1013, PETRI_PLACES=116, PETRI_TRANSITIONS=97} [2023-09-01 13:03:18,418 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 95 predicate places. [2023-09-01 13:03:18,419 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 97 transitions, 1013 flow [2023-09-01 13:03:18,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 79.1) internal successors, (1582), 20 states have internal predecessors, (1582), 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) [2023-09-01 13:03:18,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:18,419 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:18,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 13:03:18,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 13:03:18,624 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:18,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:18,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1056177927, now seen corresponding path program 14 times [2023-09-01 13:03:18,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:18,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626769650] [2023-09-01 13:03:18,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:18,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:18,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:03:19,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:19,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626769650] [2023-09-01 13:03:19,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626769650] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:19,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057149311] [2023-09-01 13:03:19,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:03:19,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:19,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:19,077 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:03:19,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 13:03:19,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:03:19,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:03:19,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-09-01 13:03:19,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:19,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:19,385 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:19,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-09-01 13:03:19,432 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-09-01 13:03:19,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-09-01 13:03:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:19,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057149311] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:19,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:19,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 17 [2023-09-01 13:03:19,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487660550] [2023-09-01 13:03:19,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:19,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 13:03:19,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:19,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 13:03:19,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-09-01 13:03:19,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 206 [2023-09-01 13:03:19,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 97 transitions, 1013 flow. Second operand has 19 states, 19 states have (on average 79.05263157894737) internal successors, (1502), 19 states have internal predecessors, (1502), 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) [2023-09-01 13:03:19,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:19,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 206 [2023-09-01 13:03:19,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:20,328 INFO L130 PetriNetUnfolder]: 374/666 cut-off events. [2023-09-01 13:03:20,328 INFO L131 PetriNetUnfolder]: For 4582/4582 co-relation queries the response was YES. [2023-09-01 13:03:20,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3907 conditions, 666 events. 374/666 cut-off events. For 4582/4582 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2766 event pairs, 71 based on Foata normal form. 2/667 useless extension candidates. Maximal degree in co-relation 3841. Up to 536 conditions per place. [2023-09-01 13:03:20,333 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 115 selfloop transitions, 30 changer transitions 2/147 dead transitions. [2023-09-01 13:03:20,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 147 transitions, 1749 flow [2023-09-01 13:03:20,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 13:03:20,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 13:03:20,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1315 transitions. [2023-09-01 13:03:20,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39896844660194175 [2023-09-01 13:03:20,335 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1315 transitions. [2023-09-01 13:03:20,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1315 transitions. [2023-09-01 13:03:20,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:20,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1315 transitions. [2023-09-01 13:03:20,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 82.1875) internal successors, (1315), 16 states have internal predecessors, (1315), 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) [2023-09-01 13:03:20,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 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) [2023-09-01 13:03:20,340 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 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) [2023-09-01 13:03:20,340 INFO L175 Difference]: Start difference. First operand has 116 places, 97 transitions, 1013 flow. Second operand 16 states and 1315 transitions. [2023-09-01 13:03:20,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 147 transitions, 1749 flow [2023-09-01 13:03:20,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 147 transitions, 1647 flow, removed 27 selfloop flow, removed 12 redundant places. [2023-09-01 13:03:20,351 INFO L231 Difference]: Finished difference. Result has 122 places, 111 transitions, 1287 flow [2023-09-01 13:03:20,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1287, PETRI_PLACES=122, PETRI_TRANSITIONS=111} [2023-09-01 13:03:20,351 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 101 predicate places. [2023-09-01 13:03:20,352 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 111 transitions, 1287 flow [2023-09-01 13:03:20,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 79.05263157894737) internal successors, (1502), 19 states have internal predecessors, (1502), 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) [2023-09-01 13:03:20,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:20,352 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:20,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 13:03:20,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:20,557 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:20,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:20,558 INFO L85 PathProgramCache]: Analyzing trace with hash -425348409, now seen corresponding path program 15 times [2023-09-01 13:03:20,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:20,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286042507] [2023-09-01 13:03:20,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:20,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:20,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:21,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:03:21,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:21,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286042507] [2023-09-01 13:03:21,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286042507] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:21,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225640112] [2023-09-01 13:03:21,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:03:21,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:21,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:21,021 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:03:21,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 13:03:21,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 13:03:21,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:03:21,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-09-01 13:03:21,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:21,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:21,414 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:21,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-09-01 13:03:21,451 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-09-01 13:03:21,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-09-01 13:03:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:21,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225640112] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:21,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:21,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-09-01 13:03:21,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497488840] [2023-09-01 13:03:21,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:21,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 13:03:21,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:21,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 13:03:21,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2023-09-01 13:03:22,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 206 [2023-09-01 13:03:22,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 111 transitions, 1287 flow. Second operand has 26 states, 26 states have (on average 74.88461538461539) internal successors, (1947), 26 states have internal predecessors, (1947), 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) [2023-09-01 13:03:22,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:22,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 206 [2023-09-01 13:03:22,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:22,758 INFO L130 PetriNetUnfolder]: 460/822 cut-off events. [2023-09-01 13:03:22,759 INFO L131 PetriNetUnfolder]: For 6416/6416 co-relation queries the response was YES. [2023-09-01 13:03:22,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4953 conditions, 822 events. 460/822 cut-off events. For 6416/6416 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3692 event pairs, 92 based on Foata normal form. 2/823 useless extension candidates. Maximal degree in co-relation 4883. Up to 663 conditions per place. [2023-09-01 13:03:22,764 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 134 selfloop transitions, 37 changer transitions 2/173 dead transitions. [2023-09-01 13:03:22,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 173 transitions, 2127 flow [2023-09-01 13:03:22,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 13:03:22,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 13:03:22,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1488 transitions. [2023-09-01 13:03:22,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38017373530914667 [2023-09-01 13:03:22,767 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1488 transitions. [2023-09-01 13:03:22,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1488 transitions. [2023-09-01 13:03:22,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:22,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1488 transitions. [2023-09-01 13:03:22,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 78.3157894736842) internal successors, (1488), 19 states have internal predecessors, (1488), 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) [2023-09-01 13:03:22,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 206.0) internal successors, (4120), 20 states have internal predecessors, (4120), 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) [2023-09-01 13:03:22,772 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 206.0) internal successors, (4120), 20 states have internal predecessors, (4120), 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) [2023-09-01 13:03:22,772 INFO L175 Difference]: Start difference. First operand has 122 places, 111 transitions, 1287 flow. Second operand 19 states and 1488 transitions. [2023-09-01 13:03:22,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 173 transitions, 2127 flow [2023-09-01 13:03:22,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 173 transitions, 1875 flow, removed 113 selfloop flow, removed 8 redundant places. [2023-09-01 13:03:22,785 INFO L231 Difference]: Finished difference. Result has 137 places, 125 transitions, 1438 flow [2023-09-01 13:03:22,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1438, PETRI_PLACES=137, PETRI_TRANSITIONS=125} [2023-09-01 13:03:22,785 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 116 predicate places. [2023-09-01 13:03:22,785 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 125 transitions, 1438 flow [2023-09-01 13:03:22,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 74.88461538461539) internal successors, (1947), 26 states have internal predecessors, (1947), 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) [2023-09-01 13:03:22,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:22,786 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:22,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 13:03:22,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:22,991 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:22,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:22,992 INFO L85 PathProgramCache]: Analyzing trace with hash -2097113607, now seen corresponding path program 16 times [2023-09-01 13:03:22,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:22,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941829608] [2023-09-01 13:03:22,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:22,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:23,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:23,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:03:23,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:23,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941829608] [2023-09-01 13:03:23,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941829608] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:23,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103190627] [2023-09-01 13:03:23,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:03:23,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:23,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:23,413 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:03:23,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 13:03:23,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:03:23,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:03:23,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-09-01 13:03:23,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:23,652 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:03:23,653 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:23,653 INFO L350 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 31 treesize of output 14 [2023-09-01 13:03:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:23,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:23,760 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:23,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-09-01 13:03:23,808 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-09-01 13:03:23,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-09-01 13:03:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:23,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103190627] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:23,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:23,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 23 [2023-09-01 13:03:23,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972301206] [2023-09-01 13:03:23,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:23,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 13:03:23,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:23,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 13:03:23,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2023-09-01 13:03:24,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 206 [2023-09-01 13:03:24,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 125 transitions, 1438 flow. Second operand has 25 states, 25 states have (on average 74.96) internal successors, (1874), 25 states have internal predecessors, (1874), 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) [2023-09-01 13:03:24,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:24,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 206 [2023-09-01 13:03:24,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:24,663 INFO L130 PetriNetUnfolder]: 532/953 cut-off events. [2023-09-01 13:03:24,663 INFO L131 PetriNetUnfolder]: For 7118/7118 co-relation queries the response was YES. [2023-09-01 13:03:24,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5601 conditions, 953 events. 532/953 cut-off events. For 7118/7118 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4485 event pairs, 123 based on Foata normal form. 2/954 useless extension candidates. Maximal degree in co-relation 5526. Up to 806 conditions per place. [2023-09-01 13:03:24,682 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 140 selfloop transitions, 32 changer transitions 3/175 dead transitions. [2023-09-01 13:03:24,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 175 transitions, 2175 flow [2023-09-01 13:03:24,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 13:03:24,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 13:03:24,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1180 transitions. [2023-09-01 13:03:24,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3818770226537217 [2023-09-01 13:03:24,683 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1180 transitions. [2023-09-01 13:03:24,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1180 transitions. [2023-09-01 13:03:24,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:24,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1180 transitions. [2023-09-01 13:03:24,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 78.66666666666667) internal successors, (1180), 15 states have internal predecessors, (1180), 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) [2023-09-01 13:03:24,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 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) [2023-09-01 13:03:24,688 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 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) [2023-09-01 13:03:24,688 INFO L175 Difference]: Start difference. First operand has 137 places, 125 transitions, 1438 flow. Second operand 15 states and 1180 transitions. [2023-09-01 13:03:24,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 175 transitions, 2175 flow [2023-09-01 13:03:24,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 175 transitions, 1910 flow, removed 109 selfloop flow, removed 12 redundant places. [2023-09-01 13:03:24,706 INFO L231 Difference]: Finished difference. Result has 143 places, 135 transitions, 1486 flow [2023-09-01 13:03:24,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1486, PETRI_PLACES=143, PETRI_TRANSITIONS=135} [2023-09-01 13:03:24,706 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 122 predicate places. [2023-09-01 13:03:24,706 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 135 transitions, 1486 flow [2023-09-01 13:03:24,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 74.96) internal successors, (1874), 25 states have internal predecessors, (1874), 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) [2023-09-01 13:03:24,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:24,707 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:24,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 13:03:24,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:24,912 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:24,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:24,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1659998111, now seen corresponding path program 17 times [2023-09-01 13:03:24,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:24,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194665876] [2023-09-01 13:03:24,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:24,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:24,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:25,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:03:25,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:25,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194665876] [2023-09-01 13:03:25,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194665876] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:25,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653072643] [2023-09-01 13:03:25,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:03:25,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:25,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:25,365 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:03:25,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 13:03:25,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:03:25,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:03:25,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-09-01 13:03:25,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:25,600 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:03:25,601 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:25,602 INFO L350 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 31 treesize of output 14 [2023-09-01 13:03:25,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:25,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:25,701 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:25,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-09-01 13:03:25,738 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-09-01 13:03:25,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-09-01 13:03:25,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:25,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653072643] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:25,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:25,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 23 [2023-09-01 13:03:25,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591302939] [2023-09-01 13:03:25,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:25,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 13:03:25,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:25,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 13:03:25,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2023-09-01 13:03:26,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 206 [2023-09-01 13:03:26,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 135 transitions, 1486 flow. Second operand has 25 states, 25 states have (on average 74.96) internal successors, (1874), 25 states have internal predecessors, (1874), 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) [2023-09-01 13:03:26,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:26,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 206 [2023-09-01 13:03:26,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:26,645 INFO L130 PetriNetUnfolder]: 564/1011 cut-off events. [2023-09-01 13:03:26,646 INFO L131 PetriNetUnfolder]: For 7180/7180 co-relation queries the response was YES. [2023-09-01 13:03:26,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5706 conditions, 1011 events. 564/1011 cut-off events. For 7180/7180 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4838 event pairs, 139 based on Foata normal form. 2/1012 useless extension candidates. Maximal degree in co-relation 5628. Up to 896 conditions per place. [2023-09-01 13:03:26,652 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 144 selfloop transitions, 26 changer transitions 2/172 dead transitions. [2023-09-01 13:03:26,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 172 transitions, 2082 flow [2023-09-01 13:03:26,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 13:03:26,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 13:03:26,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1098 transitions. [2023-09-01 13:03:26,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38072122052704577 [2023-09-01 13:03:26,653 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1098 transitions. [2023-09-01 13:03:26,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1098 transitions. [2023-09-01 13:03:26,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:26,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1098 transitions. [2023-09-01 13:03:26,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 78.42857142857143) internal successors, (1098), 14 states have internal predecessors, (1098), 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) [2023-09-01 13:03:26,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 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) [2023-09-01 13:03:26,657 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 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) [2023-09-01 13:03:26,658 INFO L175 Difference]: Start difference. First operand has 143 places, 135 transitions, 1486 flow. Second operand 14 states and 1098 transitions. [2023-09-01 13:03:26,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 172 transitions, 2082 flow [2023-09-01 13:03:26,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 172 transitions, 1928 flow, removed 64 selfloop flow, removed 8 redundant places. [2023-09-01 13:03:26,677 INFO L231 Difference]: Finished difference. Result has 150 places, 139 transitions, 1510 flow [2023-09-01 13:03:26,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1510, PETRI_PLACES=150, PETRI_TRANSITIONS=139} [2023-09-01 13:03:26,677 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 129 predicate places. [2023-09-01 13:03:26,677 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 139 transitions, 1510 flow [2023-09-01 13:03:26,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 74.96) internal successors, (1874), 25 states have internal predecessors, (1874), 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) [2023-09-01 13:03:26,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:26,678 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:26,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 13:03:26,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:26,883 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:26,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:26,883 INFO L85 PathProgramCache]: Analyzing trace with hash 700261641, now seen corresponding path program 18 times [2023-09-01 13:03:26,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:26,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952169585] [2023-09-01 13:03:26,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:26,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:03:27,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:27,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952169585] [2023-09-01 13:03:27,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952169585] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:27,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516525061] [2023-09-01 13:03:27,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:03:27,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:27,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:27,280 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:03:27,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 13:03:27,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 13:03:27,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:03:27,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-09-01 13:03:27,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:27,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:27,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:27,624 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:27,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-09-01 13:03:27,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:27,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516525061] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:27,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:27,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 22 [2023-09-01 13:03:27,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950116421] [2023-09-01 13:03:27,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:27,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 13:03:27,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:27,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 13:03:27,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2023-09-01 13:03:28,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-09-01 13:03:28,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 139 transitions, 1510 flow. Second operand has 24 states, 24 states have (on average 77.0) internal successors, (1848), 24 states have internal predecessors, (1848), 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) [2023-09-01 13:03:28,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:28,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-09-01 13:03:28,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:28,746 INFO L130 PetriNetUnfolder]: 598/1070 cut-off events. [2023-09-01 13:03:28,746 INFO L131 PetriNetUnfolder]: For 7340/7340 co-relation queries the response was YES. [2023-09-01 13:03:28,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5983 conditions, 1070 events. 598/1070 cut-off events. For 7340/7340 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5177 event pairs, 161 based on Foata normal form. 1/1070 useless extension candidates. Maximal degree in co-relation 5902. Up to 967 conditions per place. [2023-09-01 13:03:28,753 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 129 selfloop transitions, 38 changer transitions 1/168 dead transitions. [2023-09-01 13:03:28,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 168 transitions, 2118 flow [2023-09-01 13:03:28,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 13:03:28,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 13:03:28,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1192 transitions. [2023-09-01 13:03:28,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3857605177993528 [2023-09-01 13:03:28,770 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1192 transitions. [2023-09-01 13:03:28,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1192 transitions. [2023-09-01 13:03:28,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:28,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1192 transitions. [2023-09-01 13:03:28,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 79.46666666666667) internal successors, (1192), 15 states have internal predecessors, (1192), 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) [2023-09-01 13:03:28,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 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) [2023-09-01 13:03:28,774 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 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) [2023-09-01 13:03:28,774 INFO L175 Difference]: Start difference. First operand has 150 places, 139 transitions, 1510 flow. Second operand 15 states and 1192 transitions. [2023-09-01 13:03:28,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 168 transitions, 2118 flow [2023-09-01 13:03:28,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 168 transitions, 2000 flow, removed 43 selfloop flow, removed 10 redundant places. [2023-09-01 13:03:28,796 INFO L231 Difference]: Finished difference. Result has 158 places, 147 transitions, 1695 flow [2023-09-01 13:03:28,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1392, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1695, PETRI_PLACES=158, PETRI_TRANSITIONS=147} [2023-09-01 13:03:28,797 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 137 predicate places. [2023-09-01 13:03:28,797 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 147 transitions, 1695 flow [2023-09-01 13:03:28,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 77.0) internal successors, (1848), 24 states have internal predecessors, (1848), 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) [2023-09-01 13:03:28,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:28,797 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:28,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 13:03:29,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-09-01 13:03:29,002 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:29,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:29,003 INFO L85 PathProgramCache]: Analyzing trace with hash 687923611, now seen corresponding path program 19 times [2023-09-01 13:03:29,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:29,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439468392] [2023-09-01 13:03:29,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:29,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:29,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:03:29,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:29,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439468392] [2023-09-01 13:03:29,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439468392] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:29,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055030665] [2023-09-01 13:03:29,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:03:29,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:29,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:29,397 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:03:29,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 13:03:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:29,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-09-01 13:03:29,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:03:29,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:29,728 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:29,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-09-01 13:03:29,770 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-09-01 13:03:29,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-09-01 13:03:29,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:29,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055030665] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:29,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:29,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 23 [2023-09-01 13:03:29,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123960363] [2023-09-01 13:03:29,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:29,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 13:03:29,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:29,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 13:03:29,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2023-09-01 13:03:30,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 206 [2023-09-01 13:03:30,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 147 transitions, 1695 flow. Second operand has 25 states, 25 states have (on average 75.04) internal successors, (1876), 25 states have internal predecessors, (1876), 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) [2023-09-01 13:03:30,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:30,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 206 [2023-09-01 13:03:30,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:31,001 INFO L130 PetriNetUnfolder]: 686/1229 cut-off events. [2023-09-01 13:03:31,001 INFO L131 PetriNetUnfolder]: For 10859/10859 co-relation queries the response was YES. [2023-09-01 13:03:31,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7271 conditions, 1229 events. 686/1229 cut-off events. For 10859/10859 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6249 event pairs, 171 based on Foata normal form. 3/1231 useless extension candidates. Maximal degree in co-relation 7185. Up to 1062 conditions per place. [2023-09-01 13:03:31,009 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 175 selfloop transitions, 32 changer transitions 3/210 dead transitions. [2023-09-01 13:03:31,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 210 transitions, 2743 flow [2023-09-01 13:03:31,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 13:03:31,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 13:03:31,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1339 transitions. [2023-09-01 13:03:31,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38235294117647056 [2023-09-01 13:03:31,011 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1339 transitions. [2023-09-01 13:03:31,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1339 transitions. [2023-09-01 13:03:31,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:31,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1339 transitions. [2023-09-01 13:03:31,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 78.76470588235294) internal successors, (1339), 17 states have internal predecessors, (1339), 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) [2023-09-01 13:03:31,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 206.0) internal successors, (3708), 18 states have internal predecessors, (3708), 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) [2023-09-01 13:03:31,015 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 206.0) internal successors, (3708), 18 states have internal predecessors, (3708), 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) [2023-09-01 13:03:31,016 INFO L175 Difference]: Start difference. First operand has 158 places, 147 transitions, 1695 flow. Second operand 17 states and 1339 transitions. [2023-09-01 13:03:31,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 210 transitions, 2743 flow [2023-09-01 13:03:31,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 210 transitions, 2543 flow, removed 78 selfloop flow, removed 9 redundant places. [2023-09-01 13:03:31,041 INFO L231 Difference]: Finished difference. Result has 169 places, 162 transitions, 2012 flow [2023-09-01 13:03:31,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1495, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2012, PETRI_PLACES=169, PETRI_TRANSITIONS=162} [2023-09-01 13:03:31,042 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 148 predicate places. [2023-09-01 13:03:31,042 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 162 transitions, 2012 flow [2023-09-01 13:03:31,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 75.04) internal successors, (1876), 25 states have internal predecessors, (1876), 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) [2023-09-01 13:03:31,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:31,042 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:31,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 13:03:31,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-09-01 13:03:31,245 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:31,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:31,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1655123187, now seen corresponding path program 20 times [2023-09-01 13:03:31,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:31,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693309763] [2023-09-01 13:03:31,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:31,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:03:31,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:31,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693309763] [2023-09-01 13:03:31,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693309763] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:31,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761999883] [2023-09-01 13:03:31,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:03:31,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:31,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:31,673 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:03:31,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 13:03:31,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:03:31,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:03:31,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-09-01 13:03:31,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:31,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:31,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:31,997 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:31,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-09-01 13:03:32,031 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-09-01 13:03:32,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-09-01 13:03:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:32,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761999883] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:32,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:32,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 22 [2023-09-01 13:03:32,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689931005] [2023-09-01 13:03:32,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:32,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 13:03:32,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:32,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 13:03:32,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-09-01 13:03:32,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 206 [2023-09-01 13:03:32,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 162 transitions, 2012 flow. Second operand has 24 states, 24 states have (on average 74.95833333333333) internal successors, (1799), 24 states have internal predecessors, (1799), 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) [2023-09-01 13:03:32,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:32,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 206 [2023-09-01 13:03:32,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:32,816 INFO L130 PetriNetUnfolder]: 740/1327 cut-off events. [2023-09-01 13:03:32,816 INFO L131 PetriNetUnfolder]: For 13286/13286 co-relation queries the response was YES. [2023-09-01 13:03:32,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8055 conditions, 1327 events. 740/1327 cut-off events. For 13286/13286 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6872 event pairs, 199 based on Foata normal form. 2/1328 useless extension candidates. Maximal degree in co-relation 7964. Up to 1180 conditions per place. [2023-09-01 13:03:32,826 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 173 selfloop transitions, 32 changer transitions 3/208 dead transitions. [2023-09-01 13:03:32,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 208 transitions, 2864 flow [2023-09-01 13:03:32,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 13:03:32,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 13:03:32,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1178 transitions. [2023-09-01 13:03:32,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812297734627832 [2023-09-01 13:03:32,828 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1178 transitions. [2023-09-01 13:03:32,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1178 transitions. [2023-09-01 13:03:32,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:32,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1178 transitions. [2023-09-01 13:03:32,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 78.53333333333333) internal successors, (1178), 15 states have internal predecessors, (1178), 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) [2023-09-01 13:03:32,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 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) [2023-09-01 13:03:32,832 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 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) [2023-09-01 13:03:32,832 INFO L175 Difference]: Start difference. First operand has 169 places, 162 transitions, 2012 flow. Second operand 15 states and 1178 transitions. [2023-09-01 13:03:32,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 208 transitions, 2864 flow [2023-09-01 13:03:32,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 208 transitions, 2499 flow, removed 171 selfloop flow, removed 7 redundant places. [2023-09-01 13:03:32,862 INFO L231 Difference]: Finished difference. Result has 179 places, 170 transitions, 1995 flow [2023-09-01 13:03:32,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1647, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1995, PETRI_PLACES=179, PETRI_TRANSITIONS=170} [2023-09-01 13:03:32,863 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 158 predicate places. [2023-09-01 13:03:32,863 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 170 transitions, 1995 flow [2023-09-01 13:03:32,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 74.95833333333333) internal successors, (1799), 24 states have internal predecessors, (1799), 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) [2023-09-01 13:03:32,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:32,864 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:32,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 13:03:33,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:33,069 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:33,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:33,069 INFO L85 PathProgramCache]: Analyzing trace with hash -2101988531, now seen corresponding path program 21 times [2023-09-01 13:03:33,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:33,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194046157] [2023-09-01 13:03:33,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:33,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:33,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:03:33,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:33,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194046157] [2023-09-01 13:03:33,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194046157] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:33,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748876501] [2023-09-01 13:03:33,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:03:33,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:33,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:33,513 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:03:33,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 13:03:33,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:03:33,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:03:33,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-09-01 13:03:33,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:33,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:33,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:33,827 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:33,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-09-01 13:03:33,870 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-09-01 13:03:33,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-09-01 13:03:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:33,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748876501] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:33,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:33,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 17 [2023-09-01 13:03:33,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178886185] [2023-09-01 13:03:33,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:33,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 13:03:33,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:33,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 13:03:33,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2023-09-01 13:03:34,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 206 [2023-09-01 13:03:34,421 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 170 transitions, 1995 flow. Second operand has 19 states, 19 states have (on average 79.05263157894737) internal successors, (1502), 19 states have internal predecessors, (1502), 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) [2023-09-01 13:03:34,421 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:34,421 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 206 [2023-09-01 13:03:34,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:34,883 INFO L130 PetriNetUnfolder]: 794/1425 cut-off events. [2023-09-01 13:03:34,883 INFO L131 PetriNetUnfolder]: For 14092/14092 co-relation queries the response was YES. [2023-09-01 13:03:34,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8334 conditions, 1425 events. 794/1425 cut-off events. For 14092/14092 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7536 event pairs, 227 based on Foata normal form. 2/1426 useless extension candidates. Maximal degree in co-relation 8239. Up to 1317 conditions per place. [2023-09-01 13:03:34,893 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 180 selfloop transitions, 24 changer transitions 2/206 dead transitions. [2023-09-01 13:03:34,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 206 transitions, 2825 flow [2023-09-01 13:03:34,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 13:03:34,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 13:03:34,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1070 transitions. [2023-09-01 13:03:34,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39955190440627336 [2023-09-01 13:03:34,894 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1070 transitions. [2023-09-01 13:03:34,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1070 transitions. [2023-09-01 13:03:34,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:34,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1070 transitions. [2023-09-01 13:03:34,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 82.3076923076923) internal successors, (1070), 13 states have internal predecessors, (1070), 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) [2023-09-01 13:03:34,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 206.0) internal successors, (2884), 14 states have internal predecessors, (2884), 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) [2023-09-01 13:03:34,897 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 206.0) internal successors, (2884), 14 states have internal predecessors, (2884), 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) [2023-09-01 13:03:34,897 INFO L175 Difference]: Start difference. First operand has 179 places, 170 transitions, 1995 flow. Second operand 13 states and 1070 transitions. [2023-09-01 13:03:34,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 206 transitions, 2825 flow [2023-09-01 13:03:34,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 206 transitions, 2594 flow, removed 101 selfloop flow, removed 9 redundant places. [2023-09-01 13:03:34,932 INFO L231 Difference]: Finished difference. Result has 185 places, 178 transitions, 2109 flow [2023-09-01 13:03:34,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1764, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2109, PETRI_PLACES=185, PETRI_TRANSITIONS=178} [2023-09-01 13:03:34,932 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 164 predicate places. [2023-09-01 13:03:34,932 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 178 transitions, 2109 flow [2023-09-01 13:03:34,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 79.05263157894737) internal successors, (1502), 19 states have internal predecessors, (1502), 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) [2023-09-01 13:03:34,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:34,933 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:34,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-09-01 13:03:35,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:35,138 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:35,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:35,138 INFO L85 PathProgramCache]: Analyzing trace with hash 556637051, now seen corresponding path program 22 times [2023-09-01 13:03:35,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:35,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695591091] [2023-09-01 13:03:35,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:35,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:35,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:35,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:35,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:35,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695591091] [2023-09-01 13:03:35,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695591091] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:35,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603599938] [2023-09-01 13:03:35,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:03:35,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:35,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:35,413 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:03:35,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 13:03:35,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:03:35,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:03:35,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-09-01 13:03:35,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:35,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:35,727 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:35,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-09-01 13:03:35,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:35,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603599938] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:35,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:35,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 13 [2023-09-01 13:03:35,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514972310] [2023-09-01 13:03:35,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:35,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 13:03:35,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:35,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 13:03:35,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-09-01 13:03:36,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-09-01 13:03:36,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 178 transitions, 2109 flow. Second operand has 15 states, 15 states have (on average 86.2) internal successors, (1293), 15 states have internal predecessors, (1293), 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) [2023-09-01 13:03:36,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:36,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-09-01 13:03:36,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:36,495 INFO L130 PetriNetUnfolder]: 848/1523 cut-off events. [2023-09-01 13:03:36,495 INFO L131 PetriNetUnfolder]: For 15118/15118 co-relation queries the response was YES. [2023-09-01 13:03:36,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8951 conditions, 1523 events. 848/1523 cut-off events. For 15118/15118 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8215 event pairs, 251 based on Foata normal form. 2/1524 useless extension candidates. Maximal degree in co-relation 8852. Up to 1403 conditions per place. [2023-09-01 13:03:36,503 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 185 selfloop transitions, 30 changer transitions 2/217 dead transitions. [2023-09-01 13:03:36,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 217 transitions, 2987 flow [2023-09-01 13:03:36,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 13:03:36,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 13:03:36,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1253 transitions. [2023-09-01 13:03:36,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4344660194174757 [2023-09-01 13:03:36,505 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1253 transitions. [2023-09-01 13:03:36,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1253 transitions. [2023-09-01 13:03:36,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:36,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1253 transitions. [2023-09-01 13:03:36,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 89.5) internal successors, (1253), 14 states have internal predecessors, (1253), 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) [2023-09-01 13:03:36,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 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) [2023-09-01 13:03:36,509 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 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) [2023-09-01 13:03:36,509 INFO L175 Difference]: Start difference. First operand has 185 places, 178 transitions, 2109 flow. Second operand 14 states and 1253 transitions. [2023-09-01 13:03:36,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 217 transitions, 2987 flow [2023-09-01 13:03:36,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 217 transitions, 2734 flow, removed 115 selfloop flow, removed 7 redundant places. [2023-09-01 13:03:36,545 INFO L231 Difference]: Finished difference. Result has 194 places, 186 transitions, 2229 flow [2023-09-01 13:03:36,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1856, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2229, PETRI_PLACES=194, PETRI_TRANSITIONS=186} [2023-09-01 13:03:36,545 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 173 predicate places. [2023-09-01 13:03:36,545 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 186 transitions, 2229 flow [2023-09-01 13:03:36,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 86.2) internal successors, (1293), 15 states have internal predecessors, (1293), 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) [2023-09-01 13:03:36,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:36,546 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:36,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-09-01 13:03:36,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-09-01 13:03:36,751 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:36,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:36,751 INFO L85 PathProgramCache]: Analyzing trace with hash -16642011, now seen corresponding path program 23 times [2023-09-01 13:03:36,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:36,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928035084] [2023-09-01 13:03:36,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:36,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:37,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:03:37,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:37,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928035084] [2023-09-01 13:03:37,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928035084] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:37,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049729721] [2023-09-01 13:03:37,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:03:37,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:37,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:37,215 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:03:37,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 13:03:37,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 13:03:37,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:03:37,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-09-01 13:03:37,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:37,396 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:03:37,398 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:37,398 INFO L350 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 31 treesize of output 14 [2023-09-01 13:03:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:37,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:37,491 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:37,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-09-01 13:03:37,525 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-09-01 13:03:37,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-09-01 13:03:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:37,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049729721] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:37,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:37,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 17 [2023-09-01 13:03:37,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248567986] [2023-09-01 13:03:37,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:37,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 13:03:37,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:37,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 13:03:37,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-09-01 13:03:37,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 206 [2023-09-01 13:03:37,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 186 transitions, 2229 flow. Second operand has 19 states, 19 states have (on average 79.10526315789474) internal successors, (1503), 19 states have internal predecessors, (1503), 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) [2023-09-01 13:03:37,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:37,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 206 [2023-09-01 13:03:37,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:38,400 INFO L130 PetriNetUnfolder]: 904/1625 cut-off events. [2023-09-01 13:03:38,400 INFO L131 PetriNetUnfolder]: For 17703/17703 co-relation queries the response was YES. [2023-09-01 13:03:38,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9584 conditions, 1625 events. 904/1625 cut-off events. For 17703/17703 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 8930 event pairs, 261 based on Foata normal form. 2/1626 useless extension candidates. Maximal degree in co-relation 9483. Up to 1478 conditions per place. [2023-09-01 13:03:38,408 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 197 selfloop transitions, 32 changer transitions 3/232 dead transitions. [2023-09-01 13:03:38,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 232 transitions, 3183 flow [2023-09-01 13:03:38,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 13:03:38,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 13:03:38,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1238 transitions. [2023-09-01 13:03:38,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4006472491909385 [2023-09-01 13:03:38,410 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1238 transitions. [2023-09-01 13:03:38,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1238 transitions. [2023-09-01 13:03:38,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:38,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1238 transitions. [2023-09-01 13:03:38,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 82.53333333333333) internal successors, (1238), 15 states have internal predecessors, (1238), 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) [2023-09-01 13:03:38,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 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) [2023-09-01 13:03:38,413 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 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) [2023-09-01 13:03:38,414 INFO L175 Difference]: Start difference. First operand has 194 places, 186 transitions, 2229 flow. Second operand 15 states and 1238 transitions. [2023-09-01 13:03:38,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 232 transitions, 3183 flow [2023-09-01 13:03:38,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 232 transitions, 2906 flow, removed 123 selfloop flow, removed 8 redundant places. [2023-09-01 13:03:38,460 INFO L231 Difference]: Finished difference. Result has 203 places, 194 transitions, 2342 flow [2023-09-01 13:03:38,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1952, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2342, PETRI_PLACES=203, PETRI_TRANSITIONS=194} [2023-09-01 13:03:38,460 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 182 predicate places. [2023-09-01 13:03:38,461 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 194 transitions, 2342 flow [2023-09-01 13:03:38,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 79.10526315789474) internal successors, (1503), 19 states have internal predecessors, (1503), 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) [2023-09-01 13:03:38,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:38,461 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:38,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-09-01 13:03:38,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-09-01 13:03:38,666 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:38,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:38,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1652983725, now seen corresponding path program 24 times [2023-09-01 13:03:38,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:38,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808437950] [2023-09-01 13:03:38,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:38,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:38,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:03:39,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:39,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808437950] [2023-09-01 13:03:39,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808437950] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:39,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599111272] [2023-09-01 13:03:39,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:03:39,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:39,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:39,036 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:03:39,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 13:03:39,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 13:03:39,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:03:39,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-09-01 13:03:39,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:39,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:39,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:39,355 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:39,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-09-01 13:03:39,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:39,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599111272] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:39,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:39,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 23 [2023-09-01 13:03:39,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220767694] [2023-09-01 13:03:39,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:39,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 13:03:39,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:39,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 13:03:39,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2023-09-01 13:03:39,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 206 [2023-09-01 13:03:39,930 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 194 transitions, 2342 flow. Second operand has 25 states, 25 states have (on average 75.0) internal successors, (1875), 25 states have internal predecessors, (1875), 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) [2023-09-01 13:03:39,930 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:39,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 206 [2023-09-01 13:03:39,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:40,722 INFO L130 PetriNetUnfolder]: 973/1749 cut-off events. [2023-09-01 13:03:40,722 INFO L131 PetriNetUnfolder]: For 21181/21181 co-relation queries the response was YES. [2023-09-01 13:03:40,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10399 conditions, 1749 events. 973/1749 cut-off events. For 21181/21181 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 9771 event pairs, 284 based on Foata normal form. 2/1750 useless extension candidates. Maximal degree in co-relation 10292. Up to 1577 conditions per place. [2023-09-01 13:03:40,745 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 204 selfloop transitions, 51 changer transitions 3/258 dead transitions. [2023-09-01 13:03:40,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 258 transitions, 3514 flow [2023-09-01 13:03:40,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 13:03:40,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 13:03:40,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1716 transitions. [2023-09-01 13:03:40,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3786407766990291 [2023-09-01 13:03:40,748 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1716 transitions. [2023-09-01 13:03:40,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1716 transitions. [2023-09-01 13:03:40,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:40,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1716 transitions. [2023-09-01 13:03:40,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 78.0) internal successors, (1716), 22 states have internal predecessors, (1716), 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) [2023-09-01 13:03:40,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 206.0) internal successors, (4738), 23 states have internal predecessors, (4738), 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) [2023-09-01 13:03:40,752 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 206.0) internal successors, (4738), 23 states have internal predecessors, (4738), 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) [2023-09-01 13:03:40,752 INFO L175 Difference]: Start difference. First operand has 203 places, 194 transitions, 2342 flow. Second operand 22 states and 1716 transitions. [2023-09-01 13:03:40,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 258 transitions, 3514 flow [2023-09-01 13:03:40,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 258 transitions, 3259 flow, removed 111 selfloop flow, removed 9 redundant places. [2023-09-01 13:03:40,805 INFO L231 Difference]: Finished difference. Result has 221 places, 213 transitions, 2688 flow [2023-09-01 13:03:40,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2091, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2688, PETRI_PLACES=221, PETRI_TRANSITIONS=213} [2023-09-01 13:03:40,806 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 200 predicate places. [2023-09-01 13:03:40,806 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 213 transitions, 2688 flow [2023-09-01 13:03:40,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 75.0) internal successors, (1875), 25 states have internal predecessors, (1875), 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) [2023-09-01 13:03:40,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:40,807 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:40,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-09-01 13:03:41,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-09-01 13:03:41,012 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:41,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:41,012 INFO L85 PathProgramCache]: Analyzing trace with hash -296912589, now seen corresponding path program 25 times [2023-09-01 13:03:41,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:41,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54615671] [2023-09-01 13:03:41,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:41,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:41,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:03:41,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:41,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54615671] [2023-09-01 13:03:41,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54615671] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:41,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214694756] [2023-09-01 13:03:41,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:03:41,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:41,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:41,472 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:03:41,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-09-01 13:03:41,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:41,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 74 conjunts are in the unsatisfiable core [2023-09-01 13:03:41,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:41,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:03:41,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 13:03:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:41,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:41,898 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset 4)) (.cse1 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((v_ArrVal_923 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_923) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse0 .cse1)) (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse2))))) (forall ((v_ArrVal_923 (Array Int Int))) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_923) c_~A~0.base))) (< (+ (select .cse3 c_~A~0.offset) (select .cse3 .cse2)) (+ c_~counter~0 (select .cse3 .cse1) 1)))))) is different from false [2023-09-01 13:03:41,915 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:41,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 73 [2023-09-01 13:03:41,924 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:41,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2023-09-01 13:03:41,969 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:03:42,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:42,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214694756] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:42,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:42,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 28 [2023-09-01 13:03:42,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200146385] [2023-09-01 13:03:42,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:42,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 13:03:42,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:42,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 13:03:42,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=719, Unknown=1, NotChecked=54, Total=870 [2023-09-01 13:03:42,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 206 [2023-09-01 13:03:42,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 213 transitions, 2688 flow. Second operand has 30 states, 30 states have (on average 57.6) internal successors, (1728), 30 states have internal predecessors, (1728), 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) [2023-09-01 13:03:42,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:42,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 206 [2023-09-01 13:03:42,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:43,160 INFO L130 PetriNetUnfolder]: 1043/1876 cut-off events. [2023-09-01 13:03:43,160 INFO L131 PetriNetUnfolder]: For 24401/24401 co-relation queries the response was YES. [2023-09-01 13:03:43,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11422 conditions, 1876 events. 1043/1876 cut-off events. For 24401/24401 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 10628 event pairs, 288 based on Foata normal form. 1/1876 useless extension candidates. Maximal degree in co-relation 11308. Up to 1589 conditions per place. [2023-09-01 13:03:43,171 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 198 selfloop transitions, 67 changer transitions 1/266 dead transitions. [2023-09-01 13:03:43,171 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 266 transitions, 3903 flow [2023-09-01 13:03:43,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 13:03:43,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 13:03:43,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1162 transitions. [2023-09-01 13:03:43,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2968829841594277 [2023-09-01 13:03:43,173 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1162 transitions. [2023-09-01 13:03:43,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1162 transitions. [2023-09-01 13:03:43,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:43,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1162 transitions. [2023-09-01 13:03:43,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 61.1578947368421) internal successors, (1162), 19 states have internal predecessors, (1162), 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) [2023-09-01 13:03:43,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 206.0) internal successors, (4120), 20 states have internal predecessors, (4120), 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) [2023-09-01 13:03:43,177 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 206.0) internal successors, (4120), 20 states have internal predecessors, (4120), 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) [2023-09-01 13:03:43,177 INFO L175 Difference]: Start difference. First operand has 221 places, 213 transitions, 2688 flow. Second operand 19 states and 1162 transitions. [2023-09-01 13:03:43,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 266 transitions, 3903 flow [2023-09-01 13:03:43,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 266 transitions, 3575 flow, removed 140 selfloop flow, removed 13 redundant places. [2023-09-01 13:03:43,245 INFO L231 Difference]: Finished difference. Result has 230 places, 225 transitions, 2969 flow [2023-09-01 13:03:43,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2360, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2969, PETRI_PLACES=230, PETRI_TRANSITIONS=225} [2023-09-01 13:03:43,246 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 209 predicate places. [2023-09-01 13:03:43,246 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 225 transitions, 2969 flow [2023-09-01 13:03:43,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 57.6) internal successors, (1728), 30 states have internal predecessors, (1728), 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) [2023-09-01 13:03:43,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:43,246 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:43,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-09-01 13:03:43,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:43,451 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:43,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:43,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1732503731, now seen corresponding path program 26 times [2023-09-01 13:03:43,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:43,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41356627] [2023-09-01 13:03:43,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:43,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:43,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:03:43,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:43,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41356627] [2023-09-01 13:03:43,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41356627] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:43,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281842377] [2023-09-01 13:03:43,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:03:43,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:43,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:43,956 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:03:43,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-09-01 13:03:44,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:03:44,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:03:44,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 82 conjunts are in the unsatisfiable core [2023-09-01 13:03:44,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:44,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:03:44,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 13:03:44,311 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:03:44,312 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:44,312 INFO L350 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 15 treesize of output 9 [2023-09-01 13:03:44,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:03:44,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:44,568 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((|v_thread2Thread1of1ForFork1_~i~1#1_149| Int) (v_ArrVal_958 (Array Int Int))) (or (< |v_thread2Thread1of1ForFork1_~i~1#1_149| 1) (<= c_~N~0 |v_thread2Thread1of1ForFork1_~i~1#1_149|) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_958) c_~A~0.base))) (<= (+ (select .cse0 .cse1) c_~counter~0) (+ (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset (* |v_thread2Thread1of1ForFork1_~i~1#1_149| 4)))))))) (forall ((|v_thread2Thread1of1ForFork1_~i~1#1_149| Int) (v_ArrVal_958 (Array Int Int))) (or (< |v_thread2Thread1of1ForFork1_~i~1#1_149| 1) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_958) c_~A~0.base))) (< (+ (select .cse2 c_~A~0.offset) (select .cse2 (+ c_~A~0.offset (* |v_thread2Thread1of1ForFork1_~i~1#1_149| 4)))) (+ (select .cse2 .cse1) c_~counter~0 1))) (<= c_~N~0 |v_thread2Thread1of1ForFork1_~i~1#1_149|))))) is different from false [2023-09-01 13:03:44,602 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-09-01 13:03:44,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 79 [2023-09-01 13:03:44,619 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-09-01 13:03:44,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 34 [2023-09-01 13:03:44,701 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:03:44,713 INFO L321 Elim1Store]: treesize reduction 36, result has 20.0 percent of original size [2023-09-01 13:03:44,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 17 [2023-09-01 13:03:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:03:44,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281842377] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:44,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:44,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2023-09-01 13:03:44,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550376748] [2023-09-01 13:03:44,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:44,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-09-01 13:03:44,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:44,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-09-01 13:03:44,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=944, Unknown=1, NotChecked=62, Total=1122 [2023-09-01 13:03:45,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 206 [2023-09-01 13:03:45,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 225 transitions, 2969 flow. Second operand has 34 states, 34 states have (on average 57.588235294117645) internal successors, (1958), 34 states have internal predecessors, (1958), 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) [2023-09-01 13:03:45,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:45,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 206 [2023-09-01 13:03:45,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:47,026 INFO L130 PetriNetUnfolder]: 1550/2890 cut-off events. [2023-09-01 13:03:47,026 INFO L131 PetriNetUnfolder]: For 45341/45341 co-relation queries the response was YES. [2023-09-01 13:03:47,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18179 conditions, 2890 events. 1550/2890 cut-off events. For 45341/45341 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 18887 event pairs, 106 based on Foata normal form. 5/2893 useless extension candidates. Maximal degree in co-relation 17341. Up to 1209 conditions per place. [2023-09-01 13:03:47,045 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 230 selfloop transitions, 249 changer transitions 7/486 dead transitions. [2023-09-01 13:03:47,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 486 transitions, 7418 flow [2023-09-01 13:03:47,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 13:03:47,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 13:03:47,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2123 transitions. [2023-09-01 13:03:47,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2944521497919556 [2023-09-01 13:03:47,047 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2123 transitions. [2023-09-01 13:03:47,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2123 transitions. [2023-09-01 13:03:47,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:47,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2123 transitions. [2023-09-01 13:03:47,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 60.65714285714286) internal successors, (2123), 35 states have internal predecessors, (2123), 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) [2023-09-01 13:03:47,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 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) [2023-09-01 13:03:47,053 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 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) [2023-09-01 13:03:47,053 INFO L175 Difference]: Start difference. First operand has 230 places, 225 transitions, 2969 flow. Second operand 35 states and 2123 transitions. [2023-09-01 13:03:47,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 486 transitions, 7418 flow [2023-09-01 13:03:47,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 486 transitions, 6478 flow, removed 405 selfloop flow, removed 13 redundant places. [2023-09-01 13:03:47,171 INFO L231 Difference]: Finished difference. Result has 258 places, 413 transitions, 6012 flow [2023-09-01 13:03:47,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2578, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=6012, PETRI_PLACES=258, PETRI_TRANSITIONS=413} [2023-09-01 13:03:47,172 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 237 predicate places. [2023-09-01 13:03:47,172 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 413 transitions, 6012 flow [2023-09-01 13:03:47,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 57.588235294117645) internal successors, (1958), 34 states have internal predecessors, (1958), 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) [2023-09-01 13:03:47,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:47,172 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:47,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-09-01 13:03:47,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:47,377 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:47,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:47,378 INFO L85 PathProgramCache]: Analyzing trace with hash -889712508, now seen corresponding path program 27 times [2023-09-01 13:03:47,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:47,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279707212] [2023-09-01 13:03:47,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:47,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:03:47,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:47,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279707212] [2023-09-01 13:03:47,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279707212] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:47,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995342255] [2023-09-01 13:03:47,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:03:47,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:47,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:47,588 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:03:47,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-09-01 13:03:47,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 13:03:47,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:03:47,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:03:47,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:03:47,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:47,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:03:47,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995342255] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:47,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:47,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-09-01 13:03:47,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266292673] [2023-09-01 13:03:47,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:47,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 13:03:47,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:47,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 13:03:47,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2023-09-01 13:03:48,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 206 [2023-09-01 13:03:48,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 413 transitions, 6012 flow. Second operand has 21 states, 21 states have (on average 82.42857142857143) internal successors, (1731), 21 states have internal predecessors, (1731), 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) [2023-09-01 13:03:48,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:48,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 206 [2023-09-01 13:03:48,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:49,099 INFO L130 PetriNetUnfolder]: 1829/3472 cut-off events. [2023-09-01 13:03:49,099 INFO L131 PetriNetUnfolder]: For 48609/48609 co-relation queries the response was YES. [2023-09-01 13:03:49,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22798 conditions, 3472 events. 1829/3472 cut-off events. For 48609/48609 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23606 event pairs, 803 based on Foata normal form. 210/3681 useless extension candidates. Maximal degree in co-relation 21773. Up to 2292 conditions per place. [2023-09-01 13:03:49,124 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 431 selfloop transitions, 187 changer transitions 0/618 dead transitions. [2023-09-01 13:03:49,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 618 transitions, 9990 flow [2023-09-01 13:03:49,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 13:03:49,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 13:03:49,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1792 transitions. [2023-09-01 13:03:49,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41423948220064727 [2023-09-01 13:03:49,126 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1792 transitions. [2023-09-01 13:03:49,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1792 transitions. [2023-09-01 13:03:49,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:49,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1792 transitions. [2023-09-01 13:03:49,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 85.33333333333333) internal successors, (1792), 21 states have internal predecessors, (1792), 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) [2023-09-01 13:03:49,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 206.0) internal successors, (4532), 22 states have internal predecessors, (4532), 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) [2023-09-01 13:03:49,131 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 206.0) internal successors, (4532), 22 states have internal predecessors, (4532), 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) [2023-09-01 13:03:49,131 INFO L175 Difference]: Start difference. First operand has 258 places, 413 transitions, 6012 flow. Second operand 21 states and 1792 transitions. [2023-09-01 13:03:49,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 618 transitions, 9990 flow [2023-09-01 13:03:49,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 618 transitions, 9113 flow, removed 383 selfloop flow, removed 12 redundant places. [2023-09-01 13:03:49,365 INFO L231 Difference]: Finished difference. Result has 279 places, 518 transitions, 7528 flow [2023-09-01 13:03:49,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=5146, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7528, PETRI_PLACES=279, PETRI_TRANSITIONS=518} [2023-09-01 13:03:49,366 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 258 predicate places. [2023-09-01 13:03:49,366 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 518 transitions, 7528 flow [2023-09-01 13:03:49,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 82.42857142857143) internal successors, (1731), 21 states have internal predecessors, (1731), 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) [2023-09-01 13:03:49,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:49,366 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:49,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-09-01 13:03:49,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:49,571 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:49,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:49,572 INFO L85 PathProgramCache]: Analyzing trace with hash 781016959, now seen corresponding path program 28 times [2023-09-01 13:03:49,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:49,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522960360] [2023-09-01 13:03:49,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:49,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:49,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:49,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:49,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522960360] [2023-09-01 13:03:49,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522960360] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:49,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265277645] [2023-09-01 13:03:49,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:03:49,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:49,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:49,647 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:03:49,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-09-01 13:03:49,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:03:49,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:03:49,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:03:49,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:49,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:49,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:49,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:49,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265277645] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:49,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:49,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-09-01 13:03:49,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646076716] [2023-09-01 13:03:49,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:49,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 13:03:49,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:49,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 13:03:49,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-09-01 13:03:50,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-09-01 13:03:50,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 518 transitions, 7528 flow. Second operand has 19 states, 19 states have (on average 85.89473684210526) internal successors, (1632), 19 states have internal predecessors, (1632), 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) [2023-09-01 13:03:50,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:50,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-09-01 13:03:50,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:50,725 INFO L130 PetriNetUnfolder]: 1259/2497 cut-off events. [2023-09-01 13:03:50,725 INFO L131 PetriNetUnfolder]: For 41892/41902 co-relation queries the response was YES. [2023-09-01 13:03:50,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18216 conditions, 2497 events. 1259/2497 cut-off events. For 41892/41902 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 16576 event pairs, 342 based on Foata normal form. 180/2665 useless extension candidates. Maximal degree in co-relation 17615. Up to 1074 conditions per place. [2023-09-01 13:03:50,743 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 381 selfloop transitions, 56 changer transitions 32/486 dead transitions. [2023-09-01 13:03:50,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 486 transitions, 8165 flow [2023-09-01 13:03:50,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 13:03:50,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 13:03:50,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 895 transitions. [2023-09-01 13:03:50,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4344660194174757 [2023-09-01 13:03:50,744 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 895 transitions. [2023-09-01 13:03:50,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 895 transitions. [2023-09-01 13:03:50,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:50,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 895 transitions. [2023-09-01 13:03:50,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 89.5) internal successors, (895), 10 states have internal predecessors, (895), 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) [2023-09-01 13:03:50,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 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) [2023-09-01 13:03:50,747 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 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) [2023-09-01 13:03:50,747 INFO L175 Difference]: Start difference. First operand has 279 places, 518 transitions, 7528 flow. Second operand 10 states and 895 transitions. [2023-09-01 13:03:50,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 486 transitions, 8165 flow [2023-09-01 13:03:50,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 486 transitions, 7117 flow, removed 401 selfloop flow, removed 19 redundant places. [2023-09-01 13:03:50,896 INFO L231 Difference]: Finished difference. Result has 269 places, 395 transitions, 5159 flow [2023-09-01 13:03:50,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=5251, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5159, PETRI_PLACES=269, PETRI_TRANSITIONS=395} [2023-09-01 13:03:50,897 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 248 predicate places. [2023-09-01 13:03:50,897 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 395 transitions, 5159 flow [2023-09-01 13:03:50,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 85.89473684210526) internal successors, (1632), 19 states have internal predecessors, (1632), 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) [2023-09-01 13:03:50,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:50,897 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:50,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-09-01 13:03:51,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-09-01 13:03:51,102 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:51,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:51,102 INFO L85 PathProgramCache]: Analyzing trace with hash -2070627118, now seen corresponding path program 29 times [2023-09-01 13:03:51,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:51,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757827000] [2023-09-01 13:03:51,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:51,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:51,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:51,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:51,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757827000] [2023-09-01 13:03:51,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757827000] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:51,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437852520] [2023-09-01 13:03:51,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:03:51,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:51,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:51,186 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:03:51,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-09-01 13:03:51,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 13:03:51,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:03:51,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:03:51,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:51,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:03:51,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437852520] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:51,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:51,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-09-01 13:03:51,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317120218] [2023-09-01 13:03:51,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:51,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 13:03:51,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:51,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 13:03:51,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-09-01 13:03:51,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 206 [2023-09-01 13:03:51,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 395 transitions, 5159 flow. Second operand has 19 states, 19 states have (on average 85.84210526315789) internal successors, (1631), 19 states have internal predecessors, (1631), 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) [2023-09-01 13:03:51,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:51,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 206 [2023-09-01 13:03:51,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:52,000 INFO L130 PetriNetUnfolder]: 889/1799 cut-off events. [2023-09-01 13:03:52,000 INFO L131 PetriNetUnfolder]: For 24567/24574 co-relation queries the response was YES. [2023-09-01 13:03:52,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12866 conditions, 1799 events. 889/1799 cut-off events. For 24567/24574 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11110 event pairs, 219 based on Foata normal form. 125/1924 useless extension candidates. Maximal degree in co-relation 12678. Up to 782 conditions per place. [2023-09-01 13:03:52,014 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 267 selfloop transitions, 5 changer transitions 103/381 dead transitions. [2023-09-01 13:03:52,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 381 transitions, 5638 flow [2023-09-01 13:03:52,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 13:03:52,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 13:03:52,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 894 transitions. [2023-09-01 13:03:52,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43398058252427185 [2023-09-01 13:03:52,015 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 894 transitions. [2023-09-01 13:03:52,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 894 transitions. [2023-09-01 13:03:52,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:52,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 894 transitions. [2023-09-01 13:03:52,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 89.4) internal successors, (894), 10 states have internal predecessors, (894), 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) [2023-09-01 13:03:52,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 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) [2023-09-01 13:03:52,017 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 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) [2023-09-01 13:03:52,017 INFO L175 Difference]: Start difference. First operand has 269 places, 395 transitions, 5159 flow. Second operand 10 states and 894 transitions. [2023-09-01 13:03:52,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 381 transitions, 5638 flow [2023-09-01 13:03:52,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 381 transitions, 5321 flow, removed 21 selfloop flow, removed 20 redundant places. [2023-09-01 13:03:52,098 INFO L231 Difference]: Finished difference. Result has 255 places, 270 transitions, 3286 flow [2023-09-01 13:03:52,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=4282, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3286, PETRI_PLACES=255, PETRI_TRANSITIONS=270} [2023-09-01 13:03:52,098 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 234 predicate places. [2023-09-01 13:03:52,098 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 270 transitions, 3286 flow [2023-09-01 13:03:52,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 85.84210526315789) internal successors, (1631), 19 states have internal predecessors, (1631), 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) [2023-09-01 13:03:52,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:52,099 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:52,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-09-01 13:03:52,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:52,302 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:52,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:52,303 INFO L85 PathProgramCache]: Analyzing trace with hash -187941625, now seen corresponding path program 30 times [2023-09-01 13:03:52,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:52,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684162995] [2023-09-01 13:03:52,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:52,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:03:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:03:53,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:03:53,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684162995] [2023-09-01 13:03:53,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684162995] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:03:53,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836789039] [2023-09-01 13:03:53,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:03:53,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:53,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:03:53,186 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:03:53,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-09-01 13:03:53,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 13:03:53,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:03:53,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 116 conjunts are in the unsatisfiable core [2023-09-01 13:03:53,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:03:53,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:03:53,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-09-01 13:03:53,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:03:53,750 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:53,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-09-01 13:03:53,809 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:03:53,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:03:55,462 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((v_ArrVal_1103 (Array Int Int)) (v_subst_2 Int)) (or (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1103) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse0 .cse1)) (let ((.cse2 (* 4 v_subst_2))) (+ (select .cse0 (+ c_~A~0.offset .cse2 4)) (select .cse0 (+ c_~A~0.offset .cse2)) (select .cse0 c_~A~0.offset))))) (<= c_~N~0 (+ v_subst_2 1)) (< (+ 2 v_subst_2) c_~N~0))) (forall ((v_ArrVal_1103 (Array Int Int)) (v_subst_1 Int)) (or (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1103) c_~A~0.base))) (< (let ((.cse4 (* 4 v_subst_1))) (+ (select .cse3 (+ c_~A~0.offset .cse4 4)) (select .cse3 (+ c_~A~0.offset .cse4)) (select .cse3 c_~A~0.offset))) (+ c_~counter~0 (select .cse3 .cse1) 1))) (< (+ 2 v_subst_1) c_~N~0) (<= c_~N~0 (+ v_subst_1 1)))))) is different from false [2023-09-01 13:03:55,485 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse6))) (.cse2 (+ c_~A~0.offset .cse6 4))) (and (forall ((v_ArrVal_1103 (Array Int Int)) (v_subst_2 Int)) (or (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1103) c_~A~0.base))) (<= (+ .cse0 c_~counter~0 (select .cse1 .cse2)) (let ((.cse3 (* 4 v_subst_2))) (+ (select .cse1 (+ c_~A~0.offset .cse3 4)) (select .cse1 (+ c_~A~0.offset .cse3)) (select .cse1 c_~A~0.offset))))) (<= c_~N~0 (+ v_subst_2 1)) (< (+ 2 v_subst_2) c_~N~0))) (forall ((v_ArrVal_1103 (Array Int Int)) (v_subst_1 Int)) (or (< (+ 2 v_subst_1) c_~N~0) (<= c_~N~0 (+ v_subst_1 1)) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1103) c_~A~0.base))) (< (let ((.cse5 (* 4 v_subst_1))) (+ (select .cse4 (+ c_~A~0.offset .cse5 4)) (select .cse4 (+ c_~A~0.offset .cse5)) (select .cse4 c_~A~0.offset))) (+ .cse0 c_~counter~0 (select .cse4 .cse2) 1)))))))) is different from false [2023-09-01 13:03:55,533 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:55,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 116 treesize of output 154 [2023-09-01 13:03:55,578 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:03:55,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 63 [2023-09-01 13:03:56,183 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:03:56,224 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-09-01 13:03:56,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 66 [2023-09-01 13:03:56,595 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-09-01 13:03:56,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836789039] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:56,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:56,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-09-01 13:03:56,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743934325] [2023-09-01 13:03:56,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:56,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-09-01 13:03:56,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:56,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-09-01 13:03:56,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1647, Unknown=2, NotChecked=166, Total=1980 [2023-09-01 13:03:56,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-09-01 13:03:56,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 270 transitions, 3286 flow. Second operand has 45 states, 45 states have (on average 54.44444444444444) internal successors, (2450), 45 states have internal predecessors, (2450), 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) [2023-09-01 13:03:56,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:56,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-09-01 13:03:56,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:59,419 INFO L130 PetriNetUnfolder]: 864/1584 cut-off events. [2023-09-01 13:03:59,419 INFO L131 PetriNetUnfolder]: For 27984/27984 co-relation queries the response was YES. [2023-09-01 13:03:59,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12422 conditions, 1584 events. 864/1584 cut-off events. For 27984/27984 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8429 event pairs, 32 based on Foata normal form. 2/1586 useless extension candidates. Maximal degree in co-relation 12225. Up to 891 conditions per place. [2023-09-01 13:03:59,429 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 254 selfloop transitions, 200 changer transitions 9/463 dead transitions. [2023-09-01 13:03:59,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 463 transitions, 6474 flow [2023-09-01 13:03:59,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-09-01 13:03:59,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-09-01 13:03:59,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2537 transitions. [2023-09-01 13:03:59,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2798984995586937 [2023-09-01 13:03:59,432 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2537 transitions. [2023-09-01 13:03:59,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2537 transitions. [2023-09-01 13:03:59,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:03:59,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2537 transitions. [2023-09-01 13:03:59,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 57.65909090909091) internal successors, (2537), 44 states have internal predecessors, (2537), 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) [2023-09-01 13:03:59,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 206.0) internal successors, (9270), 45 states have internal predecessors, (9270), 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) [2023-09-01 13:03:59,439 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 206.0) internal successors, (9270), 45 states have internal predecessors, (9270), 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) [2023-09-01 13:03:59,439 INFO L175 Difference]: Start difference. First operand has 255 places, 270 transitions, 3286 flow. Second operand 44 states and 2537 transitions. [2023-09-01 13:03:59,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 463 transitions, 6474 flow [2023-09-01 13:03:59,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 463 transitions, 5881 flow, removed 50 selfloop flow, removed 36 redundant places. [2023-09-01 13:03:59,500 INFO L231 Difference]: Finished difference. Result has 251 places, 362 transitions, 4956 flow [2023-09-01 13:03:59,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2908, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=4956, PETRI_PLACES=251, PETRI_TRANSITIONS=362} [2023-09-01 13:03:59,500 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 230 predicate places. [2023-09-01 13:03:59,500 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 362 transitions, 4956 flow [2023-09-01 13:03:59,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 54.44444444444444) internal successors, (2450), 45 states have internal predecessors, (2450), 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) [2023-09-01 13:03:59,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:03:59,501 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:03:59,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-09-01 13:03:59,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:03:59,706 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:03:59,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:03:59,706 INFO L85 PathProgramCache]: Analyzing trace with hash -564186213, now seen corresponding path program 31 times [2023-09-01 13:03:59,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:03:59,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248717164] [2023-09-01 13:03:59,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:03:59,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:03:59,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:00,528 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:04:00,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:04:00,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248717164] [2023-09-01 13:04:00,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248717164] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:04:00,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777587374] [2023-09-01 13:04:00,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:04:00,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:04:00,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:04:00,529 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:04:00,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-09-01 13:04:00,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:00,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-09-01 13:04:00,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:04:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 13:04:00,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:04:01,093 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:04:01,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-09-01 13:04:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 13:04:01,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777587374] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:04:01,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:04:01,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 30 [2023-09-01 13:04:01,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230921512] [2023-09-01 13:04:01,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:04:01,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 13:04:01,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:04:01,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 13:04:01,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2023-09-01 13:04:02,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 206 [2023-09-01 13:04:02,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 362 transitions, 4956 flow. Second operand has 32 states, 32 states have (on average 72.78125) internal successors, (2329), 32 states have internal predecessors, (2329), 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) [2023-09-01 13:04:02,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:04:02,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 206 [2023-09-01 13:04:02,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:04:03,919 INFO L130 PetriNetUnfolder]: 941/1715 cut-off events. [2023-09-01 13:04:03,920 INFO L131 PetriNetUnfolder]: For 29356/29356 co-relation queries the response was YES. [2023-09-01 13:04:03,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13908 conditions, 1715 events. 941/1715 cut-off events. For 29356/29356 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9309 event pairs, 144 based on Foata normal form. 1/1716 useless extension candidates. Maximal degree in co-relation 13784. Up to 1401 conditions per place. [2023-09-01 13:04:03,935 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 297 selfloop transitions, 134 changer transitions 1/432 dead transitions. [2023-09-01 13:04:03,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 432 transitions, 6683 flow [2023-09-01 13:04:03,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 13:04:03,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 13:04:03,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1881 transitions. [2023-09-01 13:04:03,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36524271844660194 [2023-09-01 13:04:03,938 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1881 transitions. [2023-09-01 13:04:03,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1881 transitions. [2023-09-01 13:04:03,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:04:03,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1881 transitions. [2023-09-01 13:04:03,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 75.24) internal successors, (1881), 25 states have internal predecessors, (1881), 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) [2023-09-01 13:04:03,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 206.0) internal successors, (5356), 26 states have internal predecessors, (5356), 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) [2023-09-01 13:04:03,943 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 206.0) internal successors, (5356), 26 states have internal predecessors, (5356), 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) [2023-09-01 13:04:03,943 INFO L175 Difference]: Start difference. First operand has 251 places, 362 transitions, 4956 flow. Second operand 25 states and 1881 transitions. [2023-09-01 13:04:03,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 432 transitions, 6683 flow [2023-09-01 13:04:04,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 432 transitions, 5871 flow, removed 369 selfloop flow, removed 11 redundant places. [2023-09-01 13:04:04,023 INFO L231 Difference]: Finished difference. Result has 271 places, 395 transitions, 5188 flow [2023-09-01 13:04:04,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=4240, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5188, PETRI_PLACES=271, PETRI_TRANSITIONS=395} [2023-09-01 13:04:04,024 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 250 predicate places. [2023-09-01 13:04:04,024 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 395 transitions, 5188 flow [2023-09-01 13:04:04,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 72.78125) internal successors, (2329), 32 states have internal predecessors, (2329), 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) [2023-09-01 13:04:04,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:04:04,025 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:04:04,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-09-01 13:04:04,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-09-01 13:04:04,229 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:04:04,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:04:04,231 INFO L85 PathProgramCache]: Analyzing trace with hash 966993389, now seen corresponding path program 32 times [2023-09-01 13:04:04,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:04:04,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301959375] [2023-09-01 13:04:04,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:04:04,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:04:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:04:05,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:04:05,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301959375] [2023-09-01 13:04:05,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301959375] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:04:05,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003408177] [2023-09-01 13:04:05,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:04:05,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:04:05,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:04:05,064 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:04:05,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-09-01 13:04:05,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:04:05,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:04:05,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-09-01 13:04:05,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:04:05,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:04:05,491 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:04:05,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-09-01 13:04:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:04:05,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:04:06,144 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:04:06,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 114 [2023-09-01 13:04:07,148 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-09-01 13:04:07,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 65 [2023-09-01 13:04:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:04:07,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003408177] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:04:07,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:04:07,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-09-01 13:04:07,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178029852] [2023-09-01 13:04:07,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:04:07,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-09-01 13:04:07,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:04:07,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-09-01 13:04:07,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1639, Unknown=0, NotChecked=0, Total=1806 [2023-09-01 13:04:11,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 206 [2023-09-01 13:04:11,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 395 transitions, 5188 flow. Second operand has 43 states, 43 states have (on average 69.51162790697674) internal successors, (2989), 43 states have internal predecessors, (2989), 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) [2023-09-01 13:04:11,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:04:11,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 206 [2023-09-01 13:04:11,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:04:15,944 INFO L130 PetriNetUnfolder]: 1095/1988 cut-off events. [2023-09-01 13:04:15,944 INFO L131 PetriNetUnfolder]: For 30088/30088 co-relation queries the response was YES. [2023-09-01 13:04:15,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15829 conditions, 1988 events. 1095/1988 cut-off events. For 30088/30088 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11074 event pairs, 82 based on Foata normal form. 2/1990 useless extension candidates. Maximal degree in co-relation 15603. Up to 1230 conditions per place. [2023-09-01 13:04:15,959 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 323 selfloop transitions, 261 changer transitions 9/593 dead transitions. [2023-09-01 13:04:15,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 593 transitions, 8564 flow [2023-09-01 13:04:15,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-09-01 13:04:15,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-09-01 13:04:15,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 5107 transitions. [2023-09-01 13:04:15,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34917270613975115 [2023-09-01 13:04:15,965 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 5107 transitions. [2023-09-01 13:04:15,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 5107 transitions. [2023-09-01 13:04:15,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:04:15,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 5107 transitions. [2023-09-01 13:04:15,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 71.92957746478874) internal successors, (5107), 71 states have internal predecessors, (5107), 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) [2023-09-01 13:04:15,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 206.0) internal successors, (14832), 72 states have internal predecessors, (14832), 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) [2023-09-01 13:04:15,979 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 206.0) internal successors, (14832), 72 states have internal predecessors, (14832), 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) [2023-09-01 13:04:15,979 INFO L175 Difference]: Start difference. First operand has 271 places, 395 transitions, 5188 flow. Second operand 71 states and 5107 transitions. [2023-09-01 13:04:15,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 593 transitions, 8564 flow [2023-09-01 13:04:16,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 593 transitions, 8013 flow, removed 189 selfloop flow, removed 12 redundant places. [2023-09-01 13:04:16,068 INFO L231 Difference]: Finished difference. Result has 337 places, 478 transitions, 6934 flow [2023-09-01 13:04:16,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=4766, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=6934, PETRI_PLACES=337, PETRI_TRANSITIONS=478} [2023-09-01 13:04:16,068 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 316 predicate places. [2023-09-01 13:04:16,068 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 478 transitions, 6934 flow [2023-09-01 13:04:16,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 69.51162790697674) internal successors, (2989), 43 states have internal predecessors, (2989), 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) [2023-09-01 13:04:16,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:04:16,069 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:04:16,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-09-01 13:04:16,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-09-01 13:04:16,274 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:04:16,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:04:16,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1143816677, now seen corresponding path program 33 times [2023-09-01 13:04:16,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:04:16,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909167467] [2023-09-01 13:04:16,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:04:16,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:04:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:04:16,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:04:16,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909167467] [2023-09-01 13:04:16,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909167467] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:04:16,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956122926] [2023-09-01 13:04:16,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:04:16,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:04:16,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:04:16,998 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:04:17,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-09-01 13:04:17,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 13:04:17,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:04:17,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 123 conjunts are in the unsatisfiable core [2023-09-01 13:04:17,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:04:17,411 INFO L350 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 11 treesize of output 7 [2023-09-01 13:04:17,442 INFO L350 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 6 treesize of output 5 [2023-09-01 13:04:17,476 INFO L350 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 6 treesize of output 5 [2023-09-01 13:04:17,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:04:17,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:04:17,791 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:04:17,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 33 [2023-09-01 13:04:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:04:17,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:04:21,228 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_1221 (Array Int Int)) (v_subst_5 Int)) (or (< (+ 2 v_subst_5) c_~N~0) (<= c_~N~0 (+ v_subst_5 1)) (forall ((v_subst_8 Int)) (or (<= c_~N~0 v_subst_8) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1221) c_~A~0.base))) (< (let ((.cse1 (* 4 v_subst_5))) (+ (select .cse0 (+ c_~A~0.offset .cse1)) (select .cse0 (+ c_~A~0.offset 4 .cse1)))) (+ c_~counter~0 (select .cse0 .cse2) (select .cse0 (+ c_~A~0.offset (* 4 v_subst_8))) 1))) (< (+ v_subst_8 1) c_~N~0))))) (forall ((v_subst_6 Int) (v_ArrVal_1221 (Array Int Int))) (or (<= c_~N~0 (+ v_subst_6 1)) (< (+ 2 v_subst_6) c_~N~0) (forall ((v_subst_7 Int)) (or (< (+ v_subst_7 1) c_~N~0) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1221) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse3 .cse2) (select .cse3 (+ c_~A~0.offset (* 4 v_subst_7)))) (let ((.cse4 (* 4 v_subst_6))) (+ (select .cse3 (+ c_~A~0.offset .cse4 4)) (select .cse3 (+ c_~A~0.offset .cse4)))))) (<= c_~N~0 v_subst_7))))))) is different from false [2023-09-01 13:04:27,442 WARN L222 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:04:27,497 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:04:27,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 76 [2023-09-01 13:04:27,520 INFO L321 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-09-01 13:04:27,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 162 treesize of output 151 [2023-09-01 13:04:27,555 INFO L321 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-09-01 13:04:27,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 102 [2023-09-01 13:04:27,580 INFO L321 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-09-01 13:04:27,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 48 [2023-09-01 13:04:27,693 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:04:27,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 77 [2023-09-01 13:04:27,709 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2023-09-01 13:04:27,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 166 treesize of output 143 [2023-09-01 13:04:27,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:04:27,717 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:04:27,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:04:27,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 51 [2023-09-01 13:04:27,751 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2023-09-01 13:04:27,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 66 [2023-09-01 13:04:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:04:27,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956122926] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:04:27,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:04:27,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 45 [2023-09-01 13:04:27,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807159897] [2023-09-01 13:04:27,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:04:27,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-09-01 13:04:27,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:04:27,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-09-01 13:04:27,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1872, Unknown=1, NotChecked=88, Total=2162 [2023-09-01 13:04:28,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-09-01 13:04:28,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 478 transitions, 6934 flow. Second operand has 47 states, 47 states have (on average 54.38297872340426) internal successors, (2556), 47 states have internal predecessors, (2556), 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) [2023-09-01 13:04:28,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:04:28,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-09-01 13:04:28,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:04:32,540 INFO L130 PetriNetUnfolder]: 1151/2096 cut-off events. [2023-09-01 13:04:32,540 INFO L131 PetriNetUnfolder]: For 38646/38646 co-relation queries the response was YES. [2023-09-01 13:04:32,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17503 conditions, 2096 events. 1151/2096 cut-off events. For 38646/38646 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 11877 event pairs, 88 based on Foata normal form. 2/2098 useless extension candidates. Maximal degree in co-relation 17357. Up to 1161 conditions per place. [2023-09-01 13:04:32,572 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 296 selfloop transitions, 304 changer transitions 10/610 dead transitions. [2023-09-01 13:04:32,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 610 transitions, 9613 flow [2023-09-01 13:04:32,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-09-01 13:04:32,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-09-01 13:04:32,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3527 transitions. [2023-09-01 13:04:32,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2761509552145318 [2023-09-01 13:04:32,591 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3527 transitions. [2023-09-01 13:04:32,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3527 transitions. [2023-09-01 13:04:32,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:04:32,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3527 transitions. [2023-09-01 13:04:32,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 56.88709677419355) internal successors, (3527), 62 states have internal predecessors, (3527), 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) [2023-09-01 13:04:32,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 206.0) internal successors, (12978), 63 states have internal predecessors, (12978), 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) [2023-09-01 13:04:32,601 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 206.0) internal successors, (12978), 63 states have internal predecessors, (12978), 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) [2023-09-01 13:04:32,601 INFO L175 Difference]: Start difference. First operand has 337 places, 478 transitions, 6934 flow. Second operand 62 states and 3527 transitions. [2023-09-01 13:04:32,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 610 transitions, 9613 flow [2023-09-01 13:04:32,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 610 transitions, 8810 flow, removed 308 selfloop flow, removed 24 redundant places. [2023-09-01 13:04:32,712 INFO L231 Difference]: Finished difference. Result has 382 places, 513 transitions, 7950 flow [2023-09-01 13:04:32,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=6231, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=7950, PETRI_PLACES=382, PETRI_TRANSITIONS=513} [2023-09-01 13:04:32,713 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 361 predicate places. [2023-09-01 13:04:32,713 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 513 transitions, 7950 flow [2023-09-01 13:04:32,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 54.38297872340426) internal successors, (2556), 47 states have internal predecessors, (2556), 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) [2023-09-01 13:04:32,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:04:32,714 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:04:32,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-09-01 13:04:32,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-09-01 13:04:32,919 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:04:32,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:04:32,919 INFO L85 PathProgramCache]: Analyzing trace with hash 228083527, now seen corresponding path program 34 times [2023-09-01 13:04:32,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:04:32,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801110883] [2023-09-01 13:04:32,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:04:32,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:04:32,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:33,515 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:04:33,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:04:33,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801110883] [2023-09-01 13:04:33,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801110883] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:04:33,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943976048] [2023-09-01 13:04:33,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:04:33,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:04:33,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:04:33,522 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:04:33,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-09-01 13:04:33,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:04:33,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:04:33,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-09-01 13:04:33,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:04:33,988 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:04:33,989 INFO L350 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 15 treesize of output 14 [2023-09-01 13:04:34,041 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:04:34,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:04:34,524 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:04:34,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 104 [2023-09-01 13:04:34,996 INFO L321 Elim1Store]: treesize reduction 44, result has 52.7 percent of original size [2023-09-01 13:04:34,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 59 [2023-09-01 13:04:35,229 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:04:35,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943976048] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:04:35,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:04:35,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2023-09-01 13:04:35,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248699273] [2023-09-01 13:04:35,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:04:35,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-09-01 13:04:35,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:04:35,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-09-01 13:04:35,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1463, Unknown=0, NotChecked=0, Total=1640 [2023-09-01 13:04:38,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 206 [2023-09-01 13:04:38,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 513 transitions, 7950 flow. Second operand has 41 states, 41 states have (on average 75.41463414634147) internal successors, (3092), 41 states have internal predecessors, (3092), 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) [2023-09-01 13:04:38,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:04:38,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 206 [2023-09-01 13:04:38,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:04:40,292 INFO L130 PetriNetUnfolder]: 1306/2371 cut-off events. [2023-09-01 13:04:40,292 INFO L131 PetriNetUnfolder]: For 54364/54364 co-relation queries the response was YES. [2023-09-01 13:04:40,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21271 conditions, 2371 events. 1306/2371 cut-off events. For 54364/54364 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13750 event pairs, 178 based on Foata normal form. 4/2375 useless extension candidates. Maximal degree in co-relation 21146. Up to 1702 conditions per place. [2023-09-01 13:04:40,313 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 363 selfloop transitions, 283 changer transitions 6/652 dead transitions. [2023-09-01 13:04:40,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 652 transitions, 11782 flow [2023-09-01 13:04:40,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 13:04:40,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 13:04:40,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2899 transitions. [2023-09-01 13:04:40,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.380346365783259 [2023-09-01 13:04:40,317 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2899 transitions. [2023-09-01 13:04:40,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2899 transitions. [2023-09-01 13:04:40,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:04:40,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2899 transitions. [2023-09-01 13:04:40,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 78.35135135135135) internal successors, (2899), 37 states have internal predecessors, (2899), 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) [2023-09-01 13:04:40,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 206.0) internal successors, (7828), 38 states have internal predecessors, (7828), 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) [2023-09-01 13:04:40,324 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 206.0) internal successors, (7828), 38 states have internal predecessors, (7828), 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) [2023-09-01 13:04:40,324 INFO L175 Difference]: Start difference. First operand has 382 places, 513 transitions, 7950 flow. Second operand 37 states and 2899 transitions. [2023-09-01 13:04:40,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 652 transitions, 11782 flow [2023-09-01 13:04:40,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 652 transitions, 10723 flow, removed 375 selfloop flow, removed 43 redundant places. [2023-09-01 13:04:40,515 INFO L231 Difference]: Finished difference. Result has 377 places, 587 transitions, 9658 flow [2023-09-01 13:04:40,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=7036, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=9658, PETRI_PLACES=377, PETRI_TRANSITIONS=587} [2023-09-01 13:04:40,516 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 356 predicate places. [2023-09-01 13:04:40,516 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 587 transitions, 9658 flow [2023-09-01 13:04:40,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 75.41463414634147) internal successors, (3092), 41 states have internal predecessors, (3092), 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) [2023-09-01 13:04:40,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:04:40,517 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:04:40,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-09-01 13:04:40,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-09-01 13:04:40,722 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:04:40,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:04:40,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2018423441, now seen corresponding path program 35 times [2023-09-01 13:04:40,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:04:40,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965273612] [2023-09-01 13:04:40,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:04:40,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:04:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:04:41,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:04:41,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965273612] [2023-09-01 13:04:41,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965273612] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:04:41,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279488615] [2023-09-01 13:04:41,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:04:41,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:04:41,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:04:41,446 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:04:41,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-09-01 13:04:41,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 13:04:41,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:04:41,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-09-01 13:04:41,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:04:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 13:04:41,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:04:41,918 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:04:41,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-09-01 13:04:42,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 13:04:42,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279488615] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:04:42,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:04:42,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 31 [2023-09-01 13:04:42,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078490879] [2023-09-01 13:04:42,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:04:42,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 13:04:42,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:04:42,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 13:04:42,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2023-09-01 13:04:43,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 206 [2023-09-01 13:04:43,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 587 transitions, 9658 flow. Second operand has 33 states, 33 states have (on average 70.63636363636364) internal successors, (2331), 33 states have internal predecessors, (2331), 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) [2023-09-01 13:04:43,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:04:43,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 206 [2023-09-01 13:04:43,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:04:46,252 INFO L130 PetriNetUnfolder]: 1463/2655 cut-off events. [2023-09-01 13:04:46,253 INFO L131 PetriNetUnfolder]: For 68853/68853 co-relation queries the response was YES. [2023-09-01 13:04:46,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25155 conditions, 2655 events. 1463/2655 cut-off events. For 68853/68853 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15834 event pairs, 181 based on Foata normal form. 3/2658 useless extension candidates. Maximal degree in co-relation 25030. Up to 1750 conditions per place. [2023-09-01 13:04:46,275 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 363 selfloop transitions, 350 changer transitions 3/716 dead transitions. [2023-09-01 13:04:46,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 716 transitions, 13558 flow [2023-09-01 13:04:46,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-09-01 13:04:46,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-09-01 13:04:46,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3018 transitions. [2023-09-01 13:04:46,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3573289130949562 [2023-09-01 13:04:46,278 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3018 transitions. [2023-09-01 13:04:46,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3018 transitions. [2023-09-01 13:04:46,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:04:46,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3018 transitions. [2023-09-01 13:04:46,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 73.60975609756098) internal successors, (3018), 41 states have internal predecessors, (3018), 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) [2023-09-01 13:04:46,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 206.0) internal successors, (8652), 42 states have internal predecessors, (8652), 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) [2023-09-01 13:04:46,285 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 206.0) internal successors, (8652), 42 states have internal predecessors, (8652), 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) [2023-09-01 13:04:46,285 INFO L175 Difference]: Start difference. First operand has 377 places, 587 transitions, 9658 flow. Second operand 41 states and 3018 transitions. [2023-09-01 13:04:46,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 716 transitions, 13558 flow [2023-09-01 13:04:46,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 716 transitions, 12793 flow, removed 260 selfloop flow, removed 26 redundant places. [2023-09-01 13:04:46,522 INFO L231 Difference]: Finished difference. Result has 396 places, 632 transitions, 11471 flow [2023-09-01 13:04:46,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=8960, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=11471, PETRI_PLACES=396, PETRI_TRANSITIONS=632} [2023-09-01 13:04:46,522 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 375 predicate places. [2023-09-01 13:04:46,522 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 632 transitions, 11471 flow [2023-09-01 13:04:46,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 70.63636363636364) internal successors, (2331), 33 states have internal predecessors, (2331), 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) [2023-09-01 13:04:46,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:04:46,523 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:04:46,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-09-01 13:04:46,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-09-01 13:04:46,728 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:04:46,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:04:46,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1083728057, now seen corresponding path program 36 times [2023-09-01 13:04:46,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:04:46,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500569810] [2023-09-01 13:04:46,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:04:46,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:04:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:47,624 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:04:47,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:04:47,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500569810] [2023-09-01 13:04:47,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500569810] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:04:47,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166953862] [2023-09-01 13:04:47,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:04:47,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:04:47,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:04:47,626 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:04:47,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-09-01 13:04:47,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 13:04:47,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:04:47,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-09-01 13:04:47,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:04:48,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:04:48,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:04:48,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-09-01 13:04:48,179 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:04:48,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:04:48,706 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:04:48,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 113 [2023-09-01 13:04:49,308 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-09-01 13:04:49,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 66 [2023-09-01 13:04:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:04:49,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166953862] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:04:49,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:04:49,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-09-01 13:04:49,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762135707] [2023-09-01 13:04:49,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:04:49,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-09-01 13:04:49,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:04:49,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-09-01 13:04:49,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1628, Unknown=0, NotChecked=0, Total=1806 [2023-09-01 13:04:52,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 206 [2023-09-01 13:04:52,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 632 transitions, 11471 flow. Second operand has 43 states, 43 states have (on average 69.51162790697674) internal successors, (2989), 43 states have internal predecessors, (2989), 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) [2023-09-01 13:04:52,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:04:52,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 206 [2023-09-01 13:04:52,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:04:57,253 INFO L130 PetriNetUnfolder]: 1521/2763 cut-off events. [2023-09-01 13:04:57,253 INFO L131 PetriNetUnfolder]: For 68183/68183 co-relation queries the response was YES. [2023-09-01 13:04:57,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26632 conditions, 2763 events. 1521/2763 cut-off events. For 68183/68183 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 16767 event pairs, 118 based on Foata normal form. 2/2765 useless extension candidates. Maximal degree in co-relation 26502. Up to 1856 conditions per place. [2023-09-01 13:04:57,277 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 444 selfloop transitions, 298 changer transitions 11/753 dead transitions. [2023-09-01 13:04:57,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 753 transitions, 14265 flow [2023-09-01 13:04:57,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-09-01 13:04:57,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-09-01 13:04:57,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 4529 transitions. [2023-09-01 13:04:57,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.348975188781014 [2023-09-01 13:04:57,280 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 4529 transitions. [2023-09-01 13:04:57,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 4529 transitions. [2023-09-01 13:04:57,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:04:57,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 4529 transitions. [2023-09-01 13:04:57,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 71.88888888888889) internal successors, (4529), 63 states have internal predecessors, (4529), 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) [2023-09-01 13:04:57,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 206.0) internal successors, (13184), 64 states have internal predecessors, (13184), 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) [2023-09-01 13:04:57,291 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 206.0) internal successors, (13184), 64 states have internal predecessors, (13184), 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) [2023-09-01 13:04:57,291 INFO L175 Difference]: Start difference. First operand has 396 places, 632 transitions, 11471 flow. Second operand 63 states and 4529 transitions. [2023-09-01 13:04:57,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 753 transitions, 14265 flow [2023-09-01 13:04:57,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 753 transitions, 13022 flow, removed 451 selfloop flow, removed 23 redundant places. [2023-09-01 13:04:57,533 INFO L231 Difference]: Finished difference. Result has 440 places, 652 transitions, 11648 flow [2023-09-01 13:04:57,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=10231, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=11648, PETRI_PLACES=440, PETRI_TRANSITIONS=652} [2023-09-01 13:04:57,534 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 419 predicate places. [2023-09-01 13:04:57,534 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 652 transitions, 11648 flow [2023-09-01 13:04:57,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 69.51162790697674) internal successors, (2989), 43 states have internal predecessors, (2989), 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) [2023-09-01 13:04:57,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:04:57,535 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:04:57,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-09-01 13:04:57,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-09-01 13:04:57,740 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:04:57,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:04:57,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1638284751, now seen corresponding path program 37 times [2023-09-01 13:04:57,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:04:57,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127586359] [2023-09-01 13:04:57,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:04:57,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:04:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:04:58,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:04:58,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127586359] [2023-09-01 13:04:58,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127586359] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:04:58,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474371921] [2023-09-01 13:04:58,229 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:04:58,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:04:58,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:04:58,230 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:04:58,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-09-01 13:04:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:58,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-09-01 13:04:58,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:04:58,507 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 13:04:58,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:04:58,667 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:04:58,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-09-01 13:04:58,844 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 13:04:58,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474371921] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:04:58,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:04:58,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 22 [2023-09-01 13:04:58,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77875181] [2023-09-01 13:04:58,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:04:58,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 13:04:58,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:04:58,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 13:04:58,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2023-09-01 13:04:59,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 206 [2023-09-01 13:04:59,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 652 transitions, 11648 flow. Second operand has 24 states, 24 states have (on average 84.04166666666667) internal successors, (2017), 24 states have internal predecessors, (2017), 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) [2023-09-01 13:04:59,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:04:59,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 206 [2023-09-01 13:04:59,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:05:00,730 INFO L130 PetriNetUnfolder]: 1618/2957 cut-off events. [2023-09-01 13:05:00,730 INFO L131 PetriNetUnfolder]: For 78648/78648 co-relation queries the response was YES. [2023-09-01 13:05:00,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29218 conditions, 2957 events. 1618/2957 cut-off events. For 78648/78648 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 18236 event pairs, 271 based on Foata normal form. 2/2959 useless extension candidates. Maximal degree in co-relation 29082. Up to 2442 conditions per place. [2023-09-01 13:05:00,758 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 551 selfloop transitions, 171 changer transitions 2/724 dead transitions. [2023-09-01 13:05:00,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 724 transitions, 14819 flow [2023-09-01 13:05:00,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 13:05:00,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 13:05:00,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1747 transitions. [2023-09-01 13:05:00,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42402912621359223 [2023-09-01 13:05:00,760 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1747 transitions. [2023-09-01 13:05:00,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1747 transitions. [2023-09-01 13:05:00,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:05:00,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1747 transitions. [2023-09-01 13:05:00,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 87.35) internal successors, (1747), 20 states have internal predecessors, (1747), 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) [2023-09-01 13:05:00,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 206.0) internal successors, (4326), 21 states have internal predecessors, (4326), 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) [2023-09-01 13:05:00,764 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 206.0) internal successors, (4326), 21 states have internal predecessors, (4326), 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) [2023-09-01 13:05:00,764 INFO L175 Difference]: Start difference. First operand has 440 places, 652 transitions, 11648 flow. Second operand 20 states and 1747 transitions. [2023-09-01 13:05:00,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 724 transitions, 14819 flow [2023-09-01 13:05:01,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 724 transitions, 14128 flow, removed 237 selfloop flow, removed 48 redundant places. [2023-09-01 13:05:01,119 INFO L231 Difference]: Finished difference. Result has 414 places, 674 transitions, 12520 flow [2023-09-01 13:05:01,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=10963, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=12520, PETRI_PLACES=414, PETRI_TRANSITIONS=674} [2023-09-01 13:05:01,120 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 393 predicate places. [2023-09-01 13:05:01,121 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 674 transitions, 12520 flow [2023-09-01 13:05:01,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 84.04166666666667) internal successors, (2017), 24 states have internal predecessors, (2017), 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) [2023-09-01 13:05:01,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:05:01,121 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:05:01,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-09-01 13:05:01,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-09-01 13:05:01,326 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:05:01,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:05:01,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1010617733, now seen corresponding path program 38 times [2023-09-01 13:05:01,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:05:01,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135800147] [2023-09-01 13:05:01,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:05:01,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:05:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:05:02,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:05:02,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:05:02,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135800147] [2023-09-01 13:05:02,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135800147] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:05:02,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872580986] [2023-09-01 13:05:02,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:05:02,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:05:02,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:05:02,102 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:05:02,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-09-01 13:05:02,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:05:02,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:05:02,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-09-01 13:05:02,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:05:02,556 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:05:02,556 INFO L350 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 15 treesize of output 14 [2023-09-01 13:05:02,607 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:05:02,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:05:03,065 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:05:03,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 104 [2023-09-01 13:05:03,497 INFO L321 Elim1Store]: treesize reduction 44, result has 52.7 percent of original size [2023-09-01 13:05:03,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 59 [2023-09-01 13:05:03,784 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:05:03,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872580986] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:05:03,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:05:03,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-09-01 13:05:03,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333449616] [2023-09-01 13:05:03,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:05:03,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-09-01 13:05:03,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:05:03,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-09-01 13:05:03,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2023-09-01 13:05:07,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 206 [2023-09-01 13:05:07,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 674 transitions, 12520 flow. Second operand has 42 states, 42 states have (on average 70.38095238095238) internal successors, (2956), 42 states have internal predecessors, (2956), 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) [2023-09-01 13:05:07,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:05:07,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 206 [2023-09-01 13:05:07,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:05:10,548 INFO L130 PetriNetUnfolder]: 1735/3190 cut-off events. [2023-09-01 13:05:10,548 INFO L131 PetriNetUnfolder]: For 90027/90027 co-relation queries the response was YES. [2023-09-01 13:05:10,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31952 conditions, 3190 events. 1735/3190 cut-off events. For 90027/90027 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 20194 event pairs, 281 based on Foata normal form. 6/3196 useless extension candidates. Maximal degree in co-relation 31812. Up to 2471 conditions per place. [2023-09-01 13:05:10,582 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 501 selfloop transitions, 304 changer transitions 6/811 dead transitions. [2023-09-01 13:05:10,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 811 transitions, 16804 flow [2023-09-01 13:05:10,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-09-01 13:05:10,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-09-01 13:05:10,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3229 transitions. [2023-09-01 13:05:10,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3562444836716681 [2023-09-01 13:05:10,585 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3229 transitions. [2023-09-01 13:05:10,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3229 transitions. [2023-09-01 13:05:10,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:05:10,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3229 transitions. [2023-09-01 13:05:10,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 73.38636363636364) internal successors, (3229), 44 states have internal predecessors, (3229), 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) [2023-09-01 13:05:10,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 206.0) internal successors, (9270), 45 states have internal predecessors, (9270), 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) [2023-09-01 13:05:10,592 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 206.0) internal successors, (9270), 45 states have internal predecessors, (9270), 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) [2023-09-01 13:05:10,592 INFO L175 Difference]: Start difference. First operand has 414 places, 674 transitions, 12520 flow. Second operand 44 states and 3229 transitions. [2023-09-01 13:05:10,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 811 transitions, 16804 flow [2023-09-01 13:05:10,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 811 transitions, 16076 flow, removed 278 selfloop flow, removed 12 redundant places. [2023-09-01 13:05:10,967 INFO L231 Difference]: Finished difference. Result has 452 places, 729 transitions, 14544 flow [2023-09-01 13:05:10,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=11792, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=14544, PETRI_PLACES=452, PETRI_TRANSITIONS=729} [2023-09-01 13:05:10,968 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 431 predicate places. [2023-09-01 13:05:10,968 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 729 transitions, 14544 flow [2023-09-01 13:05:10,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 70.38095238095238) internal successors, (2956), 42 states have internal predecessors, (2956), 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) [2023-09-01 13:05:10,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:05:10,968 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:05:10,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-09-01 13:05:11,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-09-01 13:05:11,175 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:05:11,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:05:11,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1223489761, now seen corresponding path program 39 times [2023-09-01 13:05:11,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:05:11,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487301309] [2023-09-01 13:05:11,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:05:11,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:05:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:05:11,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:05:11,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:05:11,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487301309] [2023-09-01 13:05:11,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487301309] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:05:11,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911439585] [2023-09-01 13:05:11,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:05:11,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:05:11,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:05:11,955 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:05:11,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-09-01 13:05:12,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 13:05:12,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:05:12,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2023-09-01 13:05:12,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:05:12,318 INFO L350 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 13 treesize of output 9 [2023-09-01 13:05:12,352 INFO L350 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 6 treesize of output 5 [2023-09-01 13:05:12,388 INFO L350 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 6 treesize of output 5 [2023-09-01 13:05:12,549 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:05:12,549 INFO L350 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 17 treesize of output 14 [2023-09-01 13:05:12,628 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:05:12,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:05:13,012 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:05:13,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911439585] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:05:13,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:05:13,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 10] total 37 [2023-09-01 13:05:13,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266037366] [2023-09-01 13:05:13,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:05:13,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-09-01 13:05:13,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:05:13,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-09-01 13:05:13,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1306, Unknown=0, NotChecked=0, Total=1482 [2023-09-01 13:05:14,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 206 [2023-09-01 13:05:14,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 729 transitions, 14544 flow. Second operand has 39 states, 39 states have (on average 69.53846153846153) internal successors, (2712), 39 states have internal predecessors, (2712), 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) [2023-09-01 13:05:14,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:05:14,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 206 [2023-09-01 13:05:14,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:05:18,057 INFO L130 PetriNetUnfolder]: 1828/3362 cut-off events. [2023-09-01 13:05:18,057 INFO L131 PetriNetUnfolder]: For 100588/100588 co-relation queries the response was YES. [2023-09-01 13:05:18,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34540 conditions, 3362 events. 1828/3362 cut-off events. For 100588/100588 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21491 event pairs, 264 based on Foata normal form. 3/3365 useless extension candidates. Maximal degree in co-relation 34392. Up to 2486 conditions per place. [2023-09-01 13:05:18,089 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 471 selfloop transitions, 367 changer transitions 7/845 dead transitions. [2023-09-01 13:05:18,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 845 transitions, 18362 flow [2023-09-01 13:05:18,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-09-01 13:05:18,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-09-01 13:05:18,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3169 transitions. [2023-09-01 13:05:18,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34962488967343336 [2023-09-01 13:05:18,092 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3169 transitions. [2023-09-01 13:05:18,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3169 transitions. [2023-09-01 13:05:18,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:05:18,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3169 transitions. [2023-09-01 13:05:18,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 72.02272727272727) internal successors, (3169), 44 states have internal predecessors, (3169), 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) [2023-09-01 13:05:18,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 206.0) internal successors, (9270), 45 states have internal predecessors, (9270), 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) [2023-09-01 13:05:18,099 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 206.0) internal successors, (9270), 45 states have internal predecessors, (9270), 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) [2023-09-01 13:05:18,099 INFO L175 Difference]: Start difference. First operand has 452 places, 729 transitions, 14544 flow. Second operand 44 states and 3169 transitions. [2023-09-01 13:05:18,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 845 transitions, 18362 flow [2023-09-01 13:05:18,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 845 transitions, 17734 flow, removed 229 selfloop flow, removed 27 redundant places. [2023-09-01 13:05:18,513 INFO L231 Difference]: Finished difference. Result has 478 places, 774 transitions, 16458 flow [2023-09-01 13:05:18,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=13924, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=16458, PETRI_PLACES=478, PETRI_TRANSITIONS=774} [2023-09-01 13:05:18,514 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 457 predicate places. [2023-09-01 13:05:18,514 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 774 transitions, 16458 flow [2023-09-01 13:05:18,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 69.53846153846153) internal successors, (2712), 39 states have internal predecessors, (2712), 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) [2023-09-01 13:05:18,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:05:18,515 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:05:18,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-09-01 13:05:18,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:05:18,720 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:05:18,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:05:18,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1984083099, now seen corresponding path program 40 times [2023-09-01 13:05:18,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:05:18,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852876600] [2023-09-01 13:05:18,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:05:18,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:05:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:05:19,430 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:05:19,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:05:19,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852876600] [2023-09-01 13:05:19,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852876600] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:05:19,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635680524] [2023-09-01 13:05:19,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:05:19,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:05:19,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:05:19,431 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:05:19,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-09-01 13:05:19,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:05:19,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:05:19,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-09-01 13:05:19,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:05:19,899 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:05:19,899 INFO L350 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 15 treesize of output 14 [2023-09-01 13:05:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:05:19,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:05:20,412 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:05:20,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 113 [2023-09-01 13:05:20,881 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-09-01 13:05:20,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 66 [2023-09-01 13:05:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:05:21,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635680524] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:05:21,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:05:21,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-09-01 13:05:21,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787445442] [2023-09-01 13:05:21,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:05:21,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-09-01 13:05:21,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:05:21,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-09-01 13:05:21,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1608, Unknown=0, NotChecked=0, Total=1806 [2023-09-01 13:05:23,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 206 [2023-09-01 13:05:23,696 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 774 transitions, 16458 flow. Second operand has 43 states, 43 states have (on average 69.51162790697674) internal successors, (2989), 43 states have internal predecessors, (2989), 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) [2023-09-01 13:05:23,696 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:05:23,696 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 206 [2023-09-01 13:05:23,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:05:26,877 INFO L130 PetriNetUnfolder]: 1974/3620 cut-off events. [2023-09-01 13:05:26,877 INFO L131 PetriNetUnfolder]: For 132574/132574 co-relation queries the response was YES. [2023-09-01 13:05:26,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40468 conditions, 3620 events. 1974/3620 cut-off events. For 132574/132574 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 23536 event pairs, 279 based on Foata normal form. 2/3622 useless extension candidates. Maximal degree in co-relation 40309. Up to 3097 conditions per place. [2023-09-01 13:05:26,912 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 660 selfloop transitions, 252 changer transitions 3/915 dead transitions. [2023-09-01 13:05:26,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 915 transitions, 21314 flow [2023-09-01 13:05:26,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-09-01 13:05:26,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-09-01 13:05:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3382 transitions. [2023-09-01 13:05:26,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34930799421607106 [2023-09-01 13:05:26,915 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3382 transitions. [2023-09-01 13:05:26,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3382 transitions. [2023-09-01 13:05:26,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:05:26,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3382 transitions. [2023-09-01 13:05:26,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 71.95744680851064) internal successors, (3382), 47 states have internal predecessors, (3382), 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) [2023-09-01 13:05:26,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 206.0) internal successors, (9888), 48 states have internal predecessors, (9888), 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) [2023-09-01 13:05:26,921 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 206.0) internal successors, (9888), 48 states have internal predecessors, (9888), 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) [2023-09-01 13:05:26,921 INFO L175 Difference]: Start difference. First operand has 478 places, 774 transitions, 16458 flow. Second operand 47 states and 3382 transitions. [2023-09-01 13:05:26,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 915 transitions, 21314 flow [2023-09-01 13:05:27,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 915 transitions, 19765 flow, removed 594 selfloop flow, removed 27 redundant places. [2023-09-01 13:05:27,453 INFO L231 Difference]: Finished difference. Result has 501 places, 845 transitions, 18263 flow [2023-09-01 13:05:27,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=15104, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=18263, PETRI_PLACES=501, PETRI_TRANSITIONS=845} [2023-09-01 13:05:27,454 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 480 predicate places. [2023-09-01 13:05:27,454 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 845 transitions, 18263 flow [2023-09-01 13:05:27,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 69.51162790697674) internal successors, (2989), 43 states have internal predecessors, (2989), 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) [2023-09-01 13:05:27,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:05:27,455 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:05:27,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-09-01 13:05:27,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:05:27,663 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:05:27,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:05:27,663 INFO L85 PathProgramCache]: Analyzing trace with hash -371345147, now seen corresponding path program 41 times [2023-09-01 13:05:27,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:05:27,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582085063] [2023-09-01 13:05:27,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:05:27,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:05:27,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:05:28,454 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:05:28,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:05:28,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582085063] [2023-09-01 13:05:28,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582085063] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:05:28,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876694554] [2023-09-01 13:05:28,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:05:28,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:05:28,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:05:28,455 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:05:28,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-09-01 13:05:28,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 13:05:28,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:05:28,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-09-01 13:05:28,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:05:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:05:28,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:05:29,028 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:05:29,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-09-01 13:05:29,146 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-09-01 13:05:29,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-09-01 13:05:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 13:05:29,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876694554] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:05:29,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:05:29,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-09-01 13:05:29,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108534513] [2023-09-01 13:05:29,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:05:29,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 13:05:29,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:05:29,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 13:05:29,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2023-09-01 13:05:30,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 206 [2023-09-01 13:05:30,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 845 transitions, 18263 flow. Second operand has 35 states, 35 states have (on average 70.6) internal successors, (2471), 35 states have internal predecessors, (2471), 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) [2023-09-01 13:05:30,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:05:30,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 206 [2023-09-01 13:05:30,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:05:32,823 INFO L130 PetriNetUnfolder]: 2093/3853 cut-off events. [2023-09-01 13:05:32,824 INFO L131 PetriNetUnfolder]: For 150496/150496 co-relation queries the response was YES. [2023-09-01 13:05:32,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43988 conditions, 3853 events. 2093/3853 cut-off events. For 150496/150496 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 25328 event pairs, 330 based on Foata normal form. 6/3859 useless extension candidates. Maximal degree in co-relation 43825. Up to 3106 conditions per place. [2023-09-01 13:05:32,859 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 628 selfloop transitions, 310 changer transitions 6/944 dead transitions. [2023-09-01 13:05:32,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 944 transitions, 22905 flow [2023-09-01 13:05:32,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 13:05:32,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 13:05:32,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1924 transitions. [2023-09-01 13:05:32,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3592233009708738 [2023-09-01 13:05:32,862 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1924 transitions. [2023-09-01 13:05:32,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1924 transitions. [2023-09-01 13:05:32,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:05:32,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1924 transitions. [2023-09-01 13:05:32,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 74.0) internal successors, (1924), 26 states have internal predecessors, (1924), 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) [2023-09-01 13:05:32,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 206.0) internal successors, (5562), 27 states have internal predecessors, (5562), 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) [2023-09-01 13:05:32,866 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 206.0) internal successors, (5562), 27 states have internal predecessors, (5562), 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) [2023-09-01 13:05:32,866 INFO L175 Difference]: Start difference. First operand has 501 places, 845 transitions, 18263 flow. Second operand 26 states and 1924 transitions. [2023-09-01 13:05:32,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 944 transitions, 22905 flow [2023-09-01 13:05:33,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 944 transitions, 22222 flow, removed 262 selfloop flow, removed 32 redundant places. [2023-09-01 13:05:33,658 INFO L231 Difference]: Finished difference. Result has 499 places, 882 transitions, 20325 flow [2023-09-01 13:05:33,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=17584, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=20325, PETRI_PLACES=499, PETRI_TRANSITIONS=882} [2023-09-01 13:05:33,658 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 478 predicate places. [2023-09-01 13:05:33,659 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 882 transitions, 20325 flow [2023-09-01 13:05:33,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 70.6) internal successors, (2471), 35 states have internal predecessors, (2471), 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) [2023-09-01 13:05:33,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:05:33,659 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:05:33,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-09-01 13:05:33,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-09-01 13:05:33,861 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:05:33,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:05:33,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1894271659, now seen corresponding path program 42 times [2023-09-01 13:05:33,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:05:33,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063345402] [2023-09-01 13:05:33,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:05:33,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:05:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:05:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:05:34,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:05:34,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063345402] [2023-09-01 13:05:34,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063345402] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:05:34,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691393970] [2023-09-01 13:05:34,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:05:34,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:05:34,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:05:34,470 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:05:34,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-09-01 13:05:34,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 13:05:34,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:05:34,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 123 conjunts are in the unsatisfiable core [2023-09-01 13:05:34,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:05:34,718 INFO L350 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 11 treesize of output 7 [2023-09-01 13:05:34,756 INFO L350 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 6 treesize of output 5 [2023-09-01 13:05:34,781 INFO L350 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 6 treesize of output 5 [2023-09-01 13:05:35,051 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:05:35,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 51 [2023-09-01 13:05:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:05:35,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:05:38,472 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_1571 (Array Int Int)) (v_subst_20 Int)) (or (<= c_~N~0 v_subst_20) (< (+ v_subst_20 1) c_~N~0) (forall ((v_subst_18 Int)) (or (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1571) c_~A~0.base))) (< (+ (select .cse0 .cse1) (select .cse0 (+ c_~A~0.offset (* v_subst_20 4)))) (let ((.cse2 (* v_subst_18 4))) (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset .cse2 4)) (select .cse0 (+ c_~A~0.offset .cse2)) 1)))) (<= c_~N~0 (+ v_subst_18 1)) (< (+ 2 v_subst_18) c_~N~0))))) (forall ((v_subst_19 Int) (v_ArrVal_1571 (Array Int Int))) (or (< (+ v_subst_19 1) c_~N~0) (forall ((v_subst_17 Int)) (or (<= c_~N~0 (+ v_subst_17 1)) (< (+ 2 v_subst_17) c_~N~0) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1571) c_~A~0.base))) (<= (let ((.cse4 (* v_subst_17 4))) (+ (select .cse3 (+ c_~A~0.offset .cse4 4)) c_~counter~0 (select .cse3 (+ c_~A~0.offset .cse4)))) (+ (select .cse3 .cse1) (select .cse3 (+ c_~A~0.offset (* v_subst_19 4)))))))) (<= c_~N~0 v_subst_19))))) is different from false [2023-09-01 13:05:44,664 WARN L222 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:05:44,701 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:05:44,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 76 [2023-09-01 13:05:44,726 INFO L321 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-09-01 13:05:44,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 162 treesize of output 151 [2023-09-01 13:05:44,755 INFO L321 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-09-01 13:05:44,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 102 [2023-09-01 13:05:44,783 INFO L321 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-09-01 13:05:44,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 48 [2023-09-01 13:05:44,851 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:05:44,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 77 [2023-09-01 13:05:44,868 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2023-09-01 13:05:44,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 342 treesize of output 288 [2023-09-01 13:05:44,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:05:44,878 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:05:44,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:05:44,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 25 [2023-09-01 13:05:44,897 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2023-09-01 13:05:44,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 41 [2023-09-01 13:05:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:05:45,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691393970] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:05:45,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:05:45,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 44 [2023-09-01 13:05:45,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312857013] [2023-09-01 13:05:45,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:05:45,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-09-01 13:05:45,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:05:45,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-09-01 13:05:45,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1716, Unknown=1, NotChecked=86, Total=2070 [2023-09-01 13:05:45,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-09-01 13:05:45,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 882 transitions, 20325 flow. Second operand has 46 states, 46 states have (on average 54.32608695652174) internal successors, (2499), 46 states have internal predecessors, (2499), 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) [2023-09-01 13:05:45,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:05:45,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-09-01 13:05:45,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:05:50,441 INFO L130 PetriNetUnfolder]: 2404/4554 cut-off events. [2023-09-01 13:05:50,441 INFO L131 PetriNetUnfolder]: For 194246/194246 co-relation queries the response was YES. [2023-09-01 13:05:50,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51805 conditions, 4554 events. 2404/4554 cut-off events. For 194246/194246 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 32296 event pairs, 8 based on Foata normal form. 6/4560 useless extension candidates. Maximal degree in co-relation 51637. Up to 2897 conditions per place. [2023-09-01 13:05:50,497 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 688 selfloop transitions, 395 changer transitions 9/1092 dead transitions. [2023-09-01 13:05:50,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 1092 transitions, 26981 flow [2023-09-01 13:05:50,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-09-01 13:05:50,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-09-01 13:05:50,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2683 transitions. [2023-09-01 13:05:50,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2771121669076637 [2023-09-01 13:05:50,500 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2683 transitions. [2023-09-01 13:05:50,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2683 transitions. [2023-09-01 13:05:50,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:05:50,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2683 transitions. [2023-09-01 13:05:50,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 57.08510638297872) internal successors, (2683), 47 states have internal predecessors, (2683), 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) [2023-09-01 13:05:50,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 206.0) internal successors, (9888), 48 states have internal predecessors, (9888), 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) [2023-09-01 13:05:50,507 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 206.0) internal successors, (9888), 48 states have internal predecessors, (9888), 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) [2023-09-01 13:05:50,507 INFO L175 Difference]: Start difference. First operand has 499 places, 882 transitions, 20325 flow. Second operand 47 states and 2683 transitions. [2023-09-01 13:05:50,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 1092 transitions, 26981 flow [2023-09-01 13:05:51,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 1092 transitions, 25532 flow, removed 673 selfloop flow, removed 12 redundant places. [2023-09-01 13:05:51,499 INFO L231 Difference]: Finished difference. Result has 541 places, 1009 transitions, 23814 flow [2023-09-01 13:05:51,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=19228, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=882, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=23814, PETRI_PLACES=541, PETRI_TRANSITIONS=1009} [2023-09-01 13:05:51,500 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 520 predicate places. [2023-09-01 13:05:51,500 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 1009 transitions, 23814 flow [2023-09-01 13:05:51,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 54.32608695652174) internal successors, (2499), 46 states have internal predecessors, (2499), 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) [2023-09-01 13:05:51,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:05:51,501 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:05:51,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-09-01 13:05:51,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-09-01 13:05:51,706 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:05:51,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:05:51,706 INFO L85 PathProgramCache]: Analyzing trace with hash -905397043, now seen corresponding path program 43 times [2023-09-01 13:05:51,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:05:51,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897085665] [2023-09-01 13:05:51,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:05:51,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:05:51,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:05:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:05:52,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:05:52,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897085665] [2023-09-01 13:05:52,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897085665] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:05:52,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059285191] [2023-09-01 13:05:52,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:05:52,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:05:52,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:05:52,439 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:05:52,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-09-01 13:05:52,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:05:52,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-09-01 13:05:52,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:05:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:05:52,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:05:53,011 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:05:53,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-09-01 13:05:53,156 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-09-01 13:05:53,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-09-01 13:05:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 13:05:53,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059285191] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:05:53,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:05:53,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-09-01 13:05:53,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108111995] [2023-09-01 13:05:53,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:05:53,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 13:05:53,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:05:53,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 13:05:53,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2023-09-01 13:05:54,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 206 [2023-09-01 13:05:54,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 1009 transitions, 23814 flow. Second operand has 35 states, 35 states have (on average 69.6) internal successors, (2436), 35 states have internal predecessors, (2436), 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) [2023-09-01 13:05:54,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:05:54,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 206 [2023-09-01 13:05:54,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:05:57,871 INFO L130 PetriNetUnfolder]: 2577/4907 cut-off events. [2023-09-01 13:05:57,872 INFO L131 PetriNetUnfolder]: For 240083/240083 co-relation queries the response was YES. [2023-09-01 13:05:57,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58498 conditions, 4907 events. 2577/4907 cut-off events. For 240083/240083 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 35069 event pairs, 340 based on Foata normal form. 6/4913 useless extension candidates. Maximal degree in co-relation 58321. Up to 4162 conditions per place. [2023-09-01 13:05:57,932 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 891 selfloop transitions, 250 changer transitions 6/1147 dead transitions. [2023-09-01 13:05:57,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 1147 transitions, 30412 flow [2023-09-01 13:05:57,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 13:05:57,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 13:05:58,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2403 transitions. [2023-09-01 13:05:58,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.353486319505737 [2023-09-01 13:05:58,014 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2403 transitions. [2023-09-01 13:05:58,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2403 transitions. [2023-09-01 13:05:58,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:05:58,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2403 transitions. [2023-09-01 13:05:58,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 72.81818181818181) internal successors, (2403), 33 states have internal predecessors, (2403), 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) [2023-09-01 13:05:58,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 206.0) internal successors, (7004), 34 states have internal predecessors, (7004), 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) [2023-09-01 13:05:58,028 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 206.0) internal successors, (7004), 34 states have internal predecessors, (7004), 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) [2023-09-01 13:05:58,028 INFO L175 Difference]: Start difference. First operand has 541 places, 1009 transitions, 23814 flow. Second operand 33 states and 2403 transitions. [2023-09-01 13:05:58,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 1147 transitions, 30412 flow [2023-09-01 13:05:59,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 548 places, 1147 transitions, 28608 flow, removed 834 selfloop flow, removed 25 redundant places. [2023-09-01 13:05:59,039 INFO L231 Difference]: Finished difference. Result has 555 places, 1062 transitions, 25693 flow [2023-09-01 13:05:59,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=22328, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1009, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=789, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=25693, PETRI_PLACES=555, PETRI_TRANSITIONS=1062} [2023-09-01 13:05:59,039 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 534 predicate places. [2023-09-01 13:05:59,040 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 1062 transitions, 25693 flow [2023-09-01 13:05:59,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 69.6) internal successors, (2436), 35 states have internal predecessors, (2436), 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) [2023-09-01 13:05:59,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:05:59,040 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:05:59,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-09-01 13:05:59,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-09-01 13:05:59,245 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:05:59,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:05:59,246 INFO L85 PathProgramCache]: Analyzing trace with hash -909200725, now seen corresponding path program 44 times [2023-09-01 13:05:59,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:05:59,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702741572] [2023-09-01 13:05:59,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:05:59,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:05:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:05:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:05:59,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:05:59,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702741572] [2023-09-01 13:05:59,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702741572] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:05:59,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947251968] [2023-09-01 13:05:59,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:05:59,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:05:59,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:05:59,913 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:05:59,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-09-01 13:06:00,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:06:00,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:06:00,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 107 conjunts are in the unsatisfiable core [2023-09-01 13:06:00,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:06:00,303 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:06:00,303 INFO L350 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 15 treesize of output 14 [2023-09-01 13:06:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:06:00,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:06:00,801 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:06:00,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 113 [2023-09-01 13:06:01,296 INFO L321 Elim1Store]: treesize reduction 90, result has 12.6 percent of original size [2023-09-01 13:06:01,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 24 [2023-09-01 13:06:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:06:01,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947251968] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:06:01,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:06:01,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 39 [2023-09-01 13:06:01,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644275920] [2023-09-01 13:06:01,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:06:01,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-09-01 13:06:01,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:06:01,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-09-01 13:06:01,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1352, Unknown=0, NotChecked=0, Total=1640 [2023-09-01 13:06:03,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:06:05,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:06:07,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:06:11,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:06:15,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-09-01 13:06:15,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 1062 transitions, 25693 flow. Second operand has 41 states, 41 states have (on average 61.41463414634146) internal successors, (2518), 41 states have internal predecessors, (2518), 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) [2023-09-01 13:06:15,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:06:15,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-09-01 13:06:15,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:06:18,105 INFO L130 PetriNetUnfolder]: 2620/4988 cut-off events. [2023-09-01 13:06:18,106 INFO L131 PetriNetUnfolder]: For 225479/225479 co-relation queries the response was YES. [2023-09-01 13:06:18,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58744 conditions, 4988 events. 2620/4988 cut-off events. For 225479/225479 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 35874 event pairs, 382 based on Foata normal form. 2/4990 useless extension candidates. Maximal degree in co-relation 58560. Up to 4392 conditions per place. [2023-09-01 13:06:18,164 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 830 selfloop transitions, 284 changer transitions 3/1117 dead transitions. [2023-09-01 13:06:18,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 1117 transitions, 29347 flow [2023-09-01 13:06:18,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 13:06:18,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 13:06:18,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1604 transitions. [2023-09-01 13:06:18,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31145631067961166 [2023-09-01 13:06:18,166 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1604 transitions. [2023-09-01 13:06:18,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1604 transitions. [2023-09-01 13:06:18,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:06:18,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1604 transitions. [2023-09-01 13:06:18,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 64.16) internal successors, (1604), 25 states have internal predecessors, (1604), 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) [2023-09-01 13:06:18,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 206.0) internal successors, (5356), 26 states have internal predecessors, (5356), 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) [2023-09-01 13:06:18,170 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 206.0) internal successors, (5356), 26 states have internal predecessors, (5356), 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) [2023-09-01 13:06:18,170 INFO L175 Difference]: Start difference. First operand has 555 places, 1062 transitions, 25693 flow. Second operand 25 states and 1604 transitions. [2023-09-01 13:06:18,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 1117 transitions, 29347 flow [2023-09-01 13:06:19,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 1117 transitions, 27457 flow, removed 840 selfloop flow, removed 20 redundant places. [2023-09-01 13:06:19,436 INFO L231 Difference]: Finished difference. Result has 563 places, 1080 transitions, 25576 flow [2023-09-01 13:06:19,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=23803, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1062, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=785, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=25576, PETRI_PLACES=563, PETRI_TRANSITIONS=1080} [2023-09-01 13:06:19,438 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 542 predicate places. [2023-09-01 13:06:19,438 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 1080 transitions, 25576 flow [2023-09-01 13:06:19,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 61.41463414634146) internal successors, (2518), 41 states have internal predecessors, (2518), 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) [2023-09-01 13:06:19,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:06:19,438 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:06:19,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-09-01 13:06:19,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:06:19,644 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:06:19,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:06:19,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1356416081, now seen corresponding path program 45 times [2023-09-01 13:06:19,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:06:19,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123894578] [2023-09-01 13:06:19,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:06:19,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:06:19,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:06:20,254 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:06:20,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:06:20,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123894578] [2023-09-01 13:06:20,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123894578] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:06:20,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909331361] [2023-09-01 13:06:20,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:06:20,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:06:20,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:06:20,256 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:06:20,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-09-01 13:06:20,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 13:06:20,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:06:20,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2023-09-01 13:06:20,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:06:20,619 INFO L350 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 13 treesize of output 9 [2023-09-01 13:06:20,658 INFO L350 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 6 treesize of output 5 [2023-09-01 13:06:20,705 INFO L350 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 6 treesize of output 5 [2023-09-01 13:06:20,949 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:06:20,950 INFO L350 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 17 treesize of output 14 [2023-09-01 13:06:21,015 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:06:21,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:06:24,030 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1689 (Array Int Int)) (v_subst_21 Int)) (or (<= c_~N~0 v_subst_21) (forall ((|v_thread1Thread1of1ForFork0_~i~0#1_276| Int)) (or (<= c_~N~0 |v_thread1Thread1of1ForFork0_~i~0#1_276|) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1689) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |v_thread1Thread1of1ForFork0_~i~0#1_276| 4)))) (select .cse0 (+ (* v_subst_21 4) c_~A~0.offset)))) (< |v_thread1Thread1of1ForFork0_~i~0#1_276| 2))) (< (+ v_subst_21 1) c_~N~0))) (forall ((v_ArrVal_1689 (Array Int Int)) (v_subst_22 Int)) (or (< (+ v_subst_22 1) c_~N~0) (<= c_~N~0 v_subst_22) (forall ((|v_thread1Thread1of1ForFork0_~i~0#1_276| Int)) (or (<= c_~N~0 |v_thread1Thread1of1ForFork0_~i~0#1_276|) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1689) c_~A~0.base))) (< (select .cse1 (+ c_~A~0.offset (* v_subst_22 4))) (+ c_~counter~0 (select .cse1 (+ c_~A~0.offset (* |v_thread1Thread1of1ForFork0_~i~0#1_276| 4))) 1))) (< |v_thread1Thread1of1ForFork0_~i~0#1_276| 2)))))) is different from false [2023-09-01 13:06:26,211 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:06:26,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 46 [2023-09-01 13:06:26,218 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:06:26,218 INFO L350 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 102 treesize of output 94 [2023-09-01 13:06:26,225 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:06:26,225 INFO L350 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 86 treesize of output 70 [2023-09-01 13:06:26,233 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:06:26,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 33 [2023-09-01 13:06:26,295 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:06:26,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 47 [2023-09-01 13:06:26,302 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:06:26,302 INFO L350 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 106 treesize of output 94 [2023-09-01 13:06:26,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:06:26,311 INFO L350 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 37 [2023-09-01 13:06:26,317 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:06:26,317 INFO L350 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 76 treesize of output 56 [2023-09-01 13:06:26,469 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:06:26,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909331361] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:06:26,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:06:26,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 42 [2023-09-01 13:06:26,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913167756] [2023-09-01 13:06:26,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:06:26,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-09-01 13:06:26,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:06:26,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-09-01 13:06:26,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1580, Unknown=1, NotChecked=82, Total=1892 [2023-09-01 13:06:26,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-09-01 13:06:26,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 1080 transitions, 25576 flow. Second operand has 44 states, 44 states have (on average 54.38636363636363) internal successors, (2393), 44 states have internal predecessors, (2393), 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) [2023-09-01 13:06:26,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:06:26,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-09-01 13:06:26,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:06:29,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:06:42,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:07:02,680 INFO L130 PetriNetUnfolder]: 3213/6090 cut-off events. [2023-09-01 13:07:02,680 INFO L131 PetriNetUnfolder]: For 314855/314855 co-relation queries the response was YES. [2023-09-01 13:07:02,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74683 conditions, 6090 events. 3213/6090 cut-off events. For 314855/314855 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 45764 event pairs, 45 based on Foata normal form. 9/6099 useless extension candidates. Maximal degree in co-relation 74496. Up to 2352 conditions per place. [2023-09-01 13:07:02,751 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 759 selfloop transitions, 686 changer transitions 20/1465 dead transitions. [2023-09-01 13:07:02,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 624 places, 1465 transitions, 39088 flow [2023-09-01 13:07:02,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-09-01 13:07:02,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-09-01 13:07:02,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3572 transitions. [2023-09-01 13:07:02,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2796742875039148 [2023-09-01 13:07:02,755 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3572 transitions. [2023-09-01 13:07:02,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3572 transitions. [2023-09-01 13:07:02,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:07:02,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3572 transitions. [2023-09-01 13:07:02,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 57.61290322580645) internal successors, (3572), 62 states have internal predecessors, (3572), 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) [2023-09-01 13:07:02,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 206.0) internal successors, (12978), 63 states have internal predecessors, (12978), 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) [2023-09-01 13:07:02,764 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 206.0) internal successors, (12978), 63 states have internal predecessors, (12978), 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) [2023-09-01 13:07:02,764 INFO L175 Difference]: Start difference. First operand has 563 places, 1080 transitions, 25576 flow. Second operand 62 states and 3572 transitions. [2023-09-01 13:07:02,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 624 places, 1465 transitions, 39088 flow [2023-09-01 13:07:04,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 1465 transitions, 38096 flow, removed 412 selfloop flow, removed 15 redundant places. [2023-09-01 13:07:04,452 INFO L231 Difference]: Finished difference. Result has 628 places, 1329 transitions, 35767 flow [2023-09-01 13:07:04,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=24769, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1080, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=479, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=35767, PETRI_PLACES=628, PETRI_TRANSITIONS=1329} [2023-09-01 13:07:04,453 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 607 predicate places. [2023-09-01 13:07:04,453 INFO L495 AbstractCegarLoop]: Abstraction has has 628 places, 1329 transitions, 35767 flow [2023-09-01 13:07:04,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 54.38636363636363) internal successors, (2393), 44 states have internal predecessors, (2393), 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) [2023-09-01 13:07:04,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:07:04,454 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:07:04,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-09-01 13:07:04,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-09-01 13:07:04,659 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:07:04,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:07:04,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1441966515, now seen corresponding path program 46 times [2023-09-01 13:07:04,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:07:04,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331620239] [2023-09-01 13:07:04,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:07:04,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:07:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:07:05,202 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:07:05,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:07:05,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331620239] [2023-09-01 13:07:05,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331620239] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:07:05,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409726094] [2023-09-01 13:07:05,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:07:05,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:07:05,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:07:05,204 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:07:05,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-09-01 13:07:05,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:07:05,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:07:05,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-09-01 13:07:05,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:07:05,642 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:07:05,642 INFO L350 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 15 treesize of output 14 [2023-09-01 13:07:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:07:05,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:07:06,077 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:07:06,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 114 [2023-09-01 13:07:06,622 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-09-01 13:07:06,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 65 [2023-09-01 13:07:06,954 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:07:06,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409726094] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:07:06,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:07:06,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2023-09-01 13:07:06,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856747297] [2023-09-01 13:07:06,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:07:06,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-09-01 13:07:06,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:07:06,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-09-01 13:07:06,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1436, Unknown=0, NotChecked=0, Total=1640 [2023-09-01 13:07:09,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 206 [2023-09-01 13:07:09,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 628 places, 1329 transitions, 35767 flow. Second operand has 41 states, 41 states have (on average 75.41463414634147) internal successors, (3092), 41 states have internal predecessors, (3092), 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) [2023-09-01 13:07:09,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:07:09,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 206 [2023-09-01 13:07:09,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:07:14,310 INFO L130 PetriNetUnfolder]: 3389/6428 cut-off events. [2023-09-01 13:07:14,310 INFO L131 PetriNetUnfolder]: For 406385/406385 co-relation queries the response was YES. [2023-09-01 13:07:14,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85125 conditions, 6428 events. 3389/6428 cut-off events. For 406385/406385 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 48784 event pairs, 476 based on Foata normal form. 6/6434 useless extension candidates. Maximal degree in co-relation 84919. Up to 5867 conditions per place. [2023-09-01 13:07:14,399 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 1227 selfloop transitions, 224 changer transitions 8/1459 dead transitions. [2023-09-01 13:07:14,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 663 places, 1459 transitions, 41852 flow [2023-09-01 13:07:14,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-09-01 13:07:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-09-01 13:07:14,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2817 transitions. [2023-09-01 13:07:14,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37985436893203883 [2023-09-01 13:07:14,418 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2817 transitions. [2023-09-01 13:07:14,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2817 transitions. [2023-09-01 13:07:14,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:07:14,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2817 transitions. [2023-09-01 13:07:14,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 78.25) internal successors, (2817), 36 states have internal predecessors, (2817), 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) [2023-09-01 13:07:14,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 206.0) internal successors, (7622), 37 states have internal predecessors, (7622), 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) [2023-09-01 13:07:14,437 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 206.0) internal successors, (7622), 37 states have internal predecessors, (7622), 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) [2023-09-01 13:07:14,437 INFO L175 Difference]: Start difference. First operand has 628 places, 1329 transitions, 35767 flow. Second operand 36 states and 2817 transitions. [2023-09-01 13:07:14,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 663 places, 1459 transitions, 41852 flow [2023-09-01 13:07:17,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 629 places, 1459 transitions, 37246 flow, removed 2194 selfloop flow, removed 34 redundant places. [2023-09-01 13:07:17,374 INFO L231 Difference]: Finished difference. Result has 635 places, 1391 transitions, 34455 flow [2023-09-01 13:07:17,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=31569, PETRI_DIFFERENCE_MINUEND_PLACES=594, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=34455, PETRI_PLACES=635, PETRI_TRANSITIONS=1391} [2023-09-01 13:07:17,375 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 614 predicate places. [2023-09-01 13:07:17,375 INFO L495 AbstractCegarLoop]: Abstraction has has 635 places, 1391 transitions, 34455 flow [2023-09-01 13:07:17,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 75.41463414634147) internal successors, (3092), 41 states have internal predecessors, (3092), 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) [2023-09-01 13:07:17,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:07:17,376 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:07:17,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-09-01 13:07:17,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:07:17,581 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:07:17,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:07:17,581 INFO L85 PathProgramCache]: Analyzing trace with hash 819846609, now seen corresponding path program 47 times [2023-09-01 13:07:17,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:07:17,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686881067] [2023-09-01 13:07:17,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:07:17,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:07:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:07:18,253 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:07:18,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:07:18,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686881067] [2023-09-01 13:07:18,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686881067] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:07:18,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480135519] [2023-09-01 13:07:18,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:07:18,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:07:18,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:07:18,255 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:07:18,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-09-01 13:07:18,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 13:07:18,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:07:18,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 116 conjunts are in the unsatisfiable core [2023-09-01 13:07:18,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:07:18,494 INFO L350 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 11 treesize of output 7 [2023-09-01 13:07:18,524 INFO L350 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 6 treesize of output 5 [2023-09-01 13:07:18,548 INFO L350 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 6 treesize of output 5 [2023-09-01 13:07:18,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:07:18,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:07:18,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:07:18,791 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:07:18,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 44 treesize of output 59 [2023-09-01 13:07:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:07:18,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:07:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 13:07:19,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480135519] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:07:19,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:07:19,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 9] total 35 [2023-09-01 13:07:19,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601622846] [2023-09-01 13:07:19,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:07:19,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-09-01 13:07:19,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:07:19,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-09-01 13:07:19,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2023-09-01 13:07:22,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:07:22,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 206 [2023-09-01 13:07:22,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 635 places, 1391 transitions, 34455 flow. Second operand has 37 states, 37 states have (on average 70.51351351351352) internal successors, (2609), 37 states have internal predecessors, (2609), 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) [2023-09-01 13:07:22,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:07:22,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 206 [2023-09-01 13:07:22,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:07:28,520 INFO L130 PetriNetUnfolder]: 3734/7135 cut-off events. [2023-09-01 13:07:28,520 INFO L131 PetriNetUnfolder]: For 441891/441891 co-relation queries the response was YES. [2023-09-01 13:07:28,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92315 conditions, 7135 events. 3734/7135 cut-off events. For 441891/441891 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 55514 event pairs, 506 based on Foata normal form. 6/7141 useless extension candidates. Maximal degree in co-relation 92102. Up to 5052 conditions per place. [2023-09-01 13:07:28,610 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 998 selfloop transitions, 632 changer transitions 11/1641 dead transitions. [2023-09-01 13:07:28,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 673 places, 1641 transitions, 46491 flow [2023-09-01 13:07:28,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-09-01 13:07:28,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-09-01 13:07:28,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2915 transitions. [2023-09-01 13:07:28,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36283295992033854 [2023-09-01 13:07:28,613 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2915 transitions. [2023-09-01 13:07:28,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2915 transitions. [2023-09-01 13:07:28,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:07:28,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2915 transitions. [2023-09-01 13:07:28,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 74.74358974358974) internal successors, (2915), 39 states have internal predecessors, (2915), 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) [2023-09-01 13:07:28,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 206.0) internal successors, (8240), 40 states have internal predecessors, (8240), 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) [2023-09-01 13:07:28,619 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 206.0) internal successors, (8240), 40 states have internal predecessors, (8240), 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) [2023-09-01 13:07:28,619 INFO L175 Difference]: Start difference. First operand has 635 places, 1391 transitions, 34455 flow. Second operand 39 states and 2915 transitions. [2023-09-01 13:07:28,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 673 places, 1641 transitions, 46491 flow [2023-09-01 13:07:31,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 651 places, 1641 transitions, 45630 flow, removed 375 selfloop flow, removed 22 redundant places. [2023-09-01 13:07:31,212 INFO L231 Difference]: Finished difference. Result has 668 places, 1510 transitions, 42000 flow [2023-09-01 13:07:31,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=33640, PETRI_DIFFERENCE_MINUEND_PLACES=613, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=525, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=826, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=42000, PETRI_PLACES=668, PETRI_TRANSITIONS=1510} [2023-09-01 13:07:31,213 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 647 predicate places. [2023-09-01 13:07:31,214 INFO L495 AbstractCegarLoop]: Abstraction has has 668 places, 1510 transitions, 42000 flow [2023-09-01 13:07:31,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 70.51351351351352) internal successors, (2609), 37 states have internal predecessors, (2609), 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) [2023-09-01 13:07:31,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:07:31,214 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:07:31,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-09-01 13:07:31,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-09-01 13:07:31,419 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:07:31,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:07:31,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1952573787, now seen corresponding path program 48 times [2023-09-01 13:07:31,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:07:31,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971562559] [2023-09-01 13:07:31,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:07:31,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:07:31,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:07:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:07:32,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:07:32,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971562559] [2023-09-01 13:07:32,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971562559] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:07:32,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161343712] [2023-09-01 13:07:32,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:07:32,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:07:32,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:07:32,119 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:07:32,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-09-01 13:07:32,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 13:07:32,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:07:32,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-09-01 13:07:32,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:07:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 13:07:32,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:07:32,648 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:07:32,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-09-01 13:07:32,803 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-09-01 13:07:32,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-09-01 13:07:32,860 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 13:07:32,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161343712] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:07:32,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:07:32,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 31 [2023-09-01 13:07:32,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362462942] [2023-09-01 13:07:32,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:07:32,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 13:07:32,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:07:32,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 13:07:32,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2023-09-01 13:07:34,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 206 [2023-09-01 13:07:34,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 668 places, 1510 transitions, 42000 flow. Second operand has 33 states, 33 states have (on average 70.78787878787878) internal successors, (2336), 33 states have internal predecessors, (2336), 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) [2023-09-01 13:07:34,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:07:34,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 206 [2023-09-01 13:07:34,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:07:39,240 INFO L130 PetriNetUnfolder]: 3876/7440 cut-off events. [2023-09-01 13:07:39,241 INFO L131 PetriNetUnfolder]: For 564917/564917 co-relation queries the response was YES. [2023-09-01 13:07:39,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103697 conditions, 7440 events. 3876/7440 cut-off events. For 564917/564917 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 58402 event pairs, 620 based on Foata normal form. 4/7444 useless extension candidates. Maximal degree in co-relation 103467. Up to 6579 conditions per place. [2023-09-01 13:07:39,339 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 1329 selfloop transitions, 304 changer transitions 5/1638 dead transitions. [2023-09-01 13:07:39,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 702 places, 1638 transitions, 49705 flow [2023-09-01 13:07:39,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 13:07:39,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 13:07:39,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2597 transitions. [2023-09-01 13:07:39,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36019417475728155 [2023-09-01 13:07:39,342 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2597 transitions. [2023-09-01 13:07:39,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2597 transitions. [2023-09-01 13:07:39,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:07:39,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2597 transitions. [2023-09-01 13:07:39,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 74.2) internal successors, (2597), 35 states have internal predecessors, (2597), 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) [2023-09-01 13:07:39,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 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) [2023-09-01 13:07:39,347 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 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) [2023-09-01 13:07:39,347 INFO L175 Difference]: Start difference. First operand has 668 places, 1510 transitions, 42000 flow. Second operand 35 states and 2597 transitions. [2023-09-01 13:07:39,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 702 places, 1638 transitions, 49705 flow [2023-09-01 13:07:43,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 687 places, 1638 transitions, 44925 flow, removed 2296 selfloop flow, removed 15 redundant places. [2023-09-01 13:07:43,382 INFO L231 Difference]: Finished difference. Result has 692 places, 1545 transitions, 40628 flow [2023-09-01 13:07:43,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=38368, PETRI_DIFFERENCE_MINUEND_PLACES=653, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=40628, PETRI_PLACES=692, PETRI_TRANSITIONS=1545} [2023-09-01 13:07:43,383 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 671 predicate places. [2023-09-01 13:07:43,383 INFO L495 AbstractCegarLoop]: Abstraction has has 692 places, 1545 transitions, 40628 flow [2023-09-01 13:07:43,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 70.78787878787878) internal successors, (2336), 33 states have internal predecessors, (2336), 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) [2023-09-01 13:07:43,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:07:43,384 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:07:43,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-09-01 13:07:43,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-09-01 13:07:43,588 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:07:43,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:07:43,589 INFO L85 PathProgramCache]: Analyzing trace with hash -825150651, now seen corresponding path program 49 times [2023-09-01 13:07:43,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:07:43,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758133411] [2023-09-01 13:07:43,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:07:43,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:07:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:07:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:07:44,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:07:44,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758133411] [2023-09-01 13:07:44,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758133411] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:07:44,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963229745] [2023-09-01 13:07:44,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:07:44,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:07:44,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:07:44,128 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:07:44,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-09-01 13:07:44,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:07:44,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-09-01 13:07:44,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:07:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:07:44,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:07:44,702 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:07:44,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-09-01 13:07:44,898 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 13:07:44,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963229745] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:07:44,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:07:44,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 8] total 32 [2023-09-01 13:07:44,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247941913] [2023-09-01 13:07:44,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:07:44,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-09-01 13:07:44,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:07:44,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-09-01 13:07:44,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2023-09-01 13:07:46,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 206 [2023-09-01 13:07:46,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 692 places, 1545 transitions, 40628 flow. Second operand has 34 states, 34 states have (on average 75.6470588235294) internal successors, (2572), 34 states have internal predecessors, (2572), 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) [2023-09-01 13:07:46,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:07:46,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 206 [2023-09-01 13:07:46,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:07:51,379 INFO L130 PetriNetUnfolder]: 4009/7711 cut-off events. [2023-09-01 13:07:51,379 INFO L131 PetriNetUnfolder]: For 545309/545309 co-relation queries the response was YES. [2023-09-01 13:07:51,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103517 conditions, 7711 events. 4009/7711 cut-off events. For 545309/545309 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 61129 event pairs, 621 based on Foata normal form. 6/7717 useless extension candidates. Maximal degree in co-relation 103283. Up to 6968 conditions per place. [2023-09-01 13:07:51,484 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 1344 selfloop transitions, 312 changer transitions 4/1660 dead transitions. [2023-09-01 13:07:51,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 722 places, 1660 transitions, 47718 flow [2023-09-01 13:07:51,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-09-01 13:07:51,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-09-01 13:07:51,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2427 transitions. [2023-09-01 13:07:51,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38005010961478236 [2023-09-01 13:07:51,487 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2427 transitions. [2023-09-01 13:07:51,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2427 transitions. [2023-09-01 13:07:51,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:07:51,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2427 transitions. [2023-09-01 13:07:51,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 78.29032258064517) internal successors, (2427), 31 states have internal predecessors, (2427), 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) [2023-09-01 13:07:51,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 206.0) internal successors, (6592), 32 states have internal predecessors, (6592), 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) [2023-09-01 13:07:51,491 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 206.0) internal successors, (6592), 32 states have internal predecessors, (6592), 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) [2023-09-01 13:07:51,492 INFO L175 Difference]: Start difference. First operand has 692 places, 1545 transitions, 40628 flow. Second operand 31 states and 2427 transitions. [2023-09-01 13:07:51,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 722 places, 1660 transitions, 47718 flow [2023-09-01 13:07:55,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 698 places, 1660 transitions, 47148 flow, removed 177 selfloop flow, removed 24 redundant places. [2023-09-01 13:07:55,552 INFO L231 Difference]: Finished difference. Result has 703 places, 1600 transitions, 43637 flow [2023-09-01 13:07:55,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=40060, PETRI_DIFFERENCE_MINUEND_PLACES=668, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=43637, PETRI_PLACES=703, PETRI_TRANSITIONS=1600} [2023-09-01 13:07:55,553 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 682 predicate places. [2023-09-01 13:07:55,553 INFO L495 AbstractCegarLoop]: Abstraction has has 703 places, 1600 transitions, 43637 flow [2023-09-01 13:07:55,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 75.6470588235294) internal successors, (2572), 34 states have internal predecessors, (2572), 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) [2023-09-01 13:07:55,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:07:55,554 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:07:55,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-09-01 13:07:55,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:07:55,758 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:07:55,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:07:55,759 INFO L85 PathProgramCache]: Analyzing trace with hash 697853573, now seen corresponding path program 50 times [2023-09-01 13:07:55,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:07:55,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315572405] [2023-09-01 13:07:55,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:07:55,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:07:55,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:07:56,642 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:07:56,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:07:56,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315572405] [2023-09-01 13:07:56,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315572405] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:07:56,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986866073] [2023-09-01 13:07:56,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:07:56,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:07:56,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:07:56,643 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:07:56,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-09-01 13:07:56,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:07:56,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:07:56,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-09-01 13:07:56,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:07:57,129 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:07:57,130 INFO L350 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 15 treesize of output 14 [2023-09-01 13:07:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:07:57,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:07:57,913 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:07:57,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 110 [2023-09-01 13:07:58,455 INFO L321 Elim1Store]: treesize reduction 44, result has 55.6 percent of original size [2023-09-01 13:07:58,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 65 [2023-09-01 13:07:58,790 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:07:58,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986866073] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:07:58,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:07:58,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-09-01 13:07:58,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094109692] [2023-09-01 13:07:58,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:07:58,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-09-01 13:07:58,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:07:58,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-09-01 13:07:58,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1542, Unknown=0, NotChecked=0, Total=1722 [2023-09-01 13:08:02,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 206 [2023-09-01 13:08:02,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 703 places, 1600 transitions, 43637 flow. Second operand has 42 states, 42 states have (on average 70.38095238095238) internal successors, (2956), 42 states have internal predecessors, (2956), 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) [2023-09-01 13:08:02,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:08:02,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 206 [2023-09-01 13:08:02,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:08:10,470 INFO L130 PetriNetUnfolder]: 4250/8142 cut-off events. [2023-09-01 13:08:10,470 INFO L131 PetriNetUnfolder]: For 596889/596889 co-relation queries the response was YES. [2023-09-01 13:08:10,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112225 conditions, 8142 events. 4250/8142 cut-off events. For 596889/596889 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 64872 event pairs, 620 based on Foata normal form. 4/8146 useless extension candidates. Maximal degree in co-relation 111986. Up to 7437 conditions per place. [2023-09-01 13:08:10,590 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 1452 selfloop transitions, 351 changer transitions 6/1809 dead transitions. [2023-09-01 13:08:10,591 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 752 places, 1809 transitions, 53799 flow [2023-09-01 13:08:10,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-09-01 13:08:10,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-09-01 13:08:10,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3643 transitions. [2023-09-01 13:08:10,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3536893203883495 [2023-09-01 13:08:10,598 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3643 transitions. [2023-09-01 13:08:10,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3643 transitions. [2023-09-01 13:08:10,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:08:10,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3643 transitions. [2023-09-01 13:08:10,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 72.86) internal successors, (3643), 50 states have internal predecessors, (3643), 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) [2023-09-01 13:08:10,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 206.0) internal successors, (10506), 51 states have internal predecessors, (10506), 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) [2023-09-01 13:08:10,606 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 206.0) internal successors, (10506), 51 states have internal predecessors, (10506), 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) [2023-09-01 13:08:10,606 INFO L175 Difference]: Start difference. First operand has 703 places, 1600 transitions, 43637 flow. Second operand 50 states and 3643 transitions. [2023-09-01 13:08:10,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 752 places, 1809 transitions, 53799 flow [2023-09-01 13:08:15,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 736 places, 1809 transitions, 51719 flow, removed 970 selfloop flow, removed 16 redundant places. [2023-09-01 13:08:15,645 INFO L231 Difference]: Finished difference. Result has 744 places, 1728 transitions, 48085 flow [2023-09-01 13:08:15,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=42192, PETRI_DIFFERENCE_MINUEND_PLACES=687, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=48085, PETRI_PLACES=744, PETRI_TRANSITIONS=1728} [2023-09-01 13:08:15,647 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 723 predicate places. [2023-09-01 13:08:15,647 INFO L495 AbstractCegarLoop]: Abstraction has has 744 places, 1728 transitions, 48085 flow [2023-09-01 13:08:15,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 70.38095238095238) internal successors, (2956), 42 states have internal predecessors, (2956), 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) [2023-09-01 13:08:15,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:08:15,648 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:08:15,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-09-01 13:08:15,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-09-01 13:08:15,853 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:08:15,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:08:15,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1836557077, now seen corresponding path program 51 times [2023-09-01 13:08:15,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:08:15,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026470703] [2023-09-01 13:08:15,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:08:15,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:08:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:08:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:08:16,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:08:16,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026470703] [2023-09-01 13:08:16,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026470703] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:08:16,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28185900] [2023-09-01 13:08:16,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:08:16,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:08:16,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:08:16,443 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:08:16,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-09-01 13:08:16,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 13:08:16,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:08:16,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2023-09-01 13:08:16,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:08:16,741 INFO L350 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 13 treesize of output 9 [2023-09-01 13:08:16,773 INFO L350 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 6 treesize of output 5 [2023-09-01 13:08:16,796 INFO L350 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 6 treesize of output 5 [2023-09-01 13:08:16,960 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:08:16,961 INFO L350 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 17 treesize of output 14 [2023-09-01 13:08:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:08:17,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:08:17,410 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:08:17,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28185900] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:08:17,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:08:17,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 10] total 36 [2023-09-01 13:08:17,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697287801] [2023-09-01 13:08:17,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:08:17,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-09-01 13:08:17,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:08:17,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-09-01 13:08:17,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1223, Unknown=0, NotChecked=0, Total=1406 [2023-09-01 13:08:18,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 206 [2023-09-01 13:08:18,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 744 places, 1728 transitions, 48085 flow. Second operand has 38 states, 38 states have (on average 69.57894736842105) internal successors, (2644), 38 states have internal predecessors, (2644), 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) [2023-09-01 13:08:18,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:08:18,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 206 [2023-09-01 13:08:18,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:08:27,547 INFO L130 PetriNetUnfolder]: 4483/8528 cut-off events. [2023-09-01 13:08:27,547 INFO L131 PetriNetUnfolder]: For 620277/620277 co-relation queries the response was YES. [2023-09-01 13:08:27,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118995 conditions, 8528 events. 4483/8528 cut-off events. For 620277/620277 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 68312 event pairs, 635 based on Foata normal form. 1/8529 useless extension candidates. Maximal degree in co-relation 118747. Up to 7606 conditions per place. [2023-09-01 13:08:27,667 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 1441 selfloop transitions, 475 changer transitions 2/1918 dead transitions. [2023-09-01 13:08:27,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 789 places, 1918 transitions, 57581 flow [2023-09-01 13:08:27,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-09-01 13:08:27,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-09-01 13:08:27,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3302 transitions. [2023-09-01 13:08:27,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34845926551287465 [2023-09-01 13:08:27,678 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3302 transitions. [2023-09-01 13:08:27,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3302 transitions. [2023-09-01 13:08:27,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:08:27,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3302 transitions. [2023-09-01 13:08:27,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 71.78260869565217) internal successors, (3302), 46 states have internal predecessors, (3302), 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) [2023-09-01 13:08:27,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 206.0) internal successors, (9682), 47 states have internal predecessors, (9682), 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) [2023-09-01 13:08:27,685 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 206.0) internal successors, (9682), 47 states have internal predecessors, (9682), 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) [2023-09-01 13:08:27,685 INFO L175 Difference]: Start difference. First operand has 744 places, 1728 transitions, 48085 flow. Second operand 46 states and 3302 transitions. [2023-09-01 13:08:27,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 789 places, 1918 transitions, 57581 flow [2023-09-01 13:08:33,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 767 places, 1918 transitions, 56334 flow, removed 552 selfloop flow, removed 22 redundant places. [2023-09-01 13:08:33,152 INFO L231 Difference]: Finished difference. Result has 778 places, 1855 transitions, 53441 flow [2023-09-01 13:08:33,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=46907, PETRI_DIFFERENCE_MINUEND_PLACES=722, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=53441, PETRI_PLACES=778, PETRI_TRANSITIONS=1855} [2023-09-01 13:08:33,153 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 757 predicate places. [2023-09-01 13:08:33,153 INFO L495 AbstractCegarLoop]: Abstraction has has 778 places, 1855 transitions, 53441 flow [2023-09-01 13:08:33,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 69.57894736842105) internal successors, (2644), 38 states have internal predecessors, (2644), 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) [2023-09-01 13:08:33,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:08:33,153 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:08:33,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-09-01 13:08:33,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-09-01 13:08:33,359 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:08:33,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:08:33,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1741928771, now seen corresponding path program 52 times [2023-09-01 13:08:33,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:08:33,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948940317] [2023-09-01 13:08:33,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:08:33,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:08:33,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:08:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:08:34,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:08:34,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948940317] [2023-09-01 13:08:34,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948940317] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:08:34,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344068194] [2023-09-01 13:08:34,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:08:34,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:08:34,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:08:34,169 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:08:34,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-09-01 13:08:34,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:08:34,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:08:34,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-09-01 13:08:34,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:08:34,656 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:08:34,656 INFO L350 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 15 treesize of output 14 [2023-09-01 13:08:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:08:34,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:08:35,122 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:08:35,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 113 [2023-09-01 13:08:35,528 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-09-01 13:08:35,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 66 [2023-09-01 13:08:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:08:35,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344068194] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:08:35,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:08:35,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-09-01 13:08:35,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221098322] [2023-09-01 13:08:35,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:08:35,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-09-01 13:08:35,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:08:35,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-09-01 13:08:35,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1529, Unknown=0, NotChecked=0, Total=1722 [2023-09-01 13:08:39,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 206 [2023-09-01 13:08:39,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 778 places, 1855 transitions, 53441 flow. Second operand has 42 states, 42 states have (on average 70.38095238095238) internal successors, (2956), 42 states have internal predecessors, (2956), 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) [2023-09-01 13:08:39,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:08:39,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 206 [2023-09-01 13:08:39,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:08:49,116 INFO L130 PetriNetUnfolder]: 4608/8781 cut-off events. [2023-09-01 13:08:49,116 INFO L131 PetriNetUnfolder]: For 696426/696426 co-relation queries the response was YES. [2023-09-01 13:08:49,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125551 conditions, 8781 events. 4608/8781 cut-off events. For 696426/696426 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 70665 event pairs, 638 based on Foata normal form. 6/8787 useless extension candidates. Maximal degree in co-relation 125294. Up to 7560 conditions per place. [2023-09-01 13:08:49,243 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 1494 selfloop transitions, 502 changer transitions 6/2002 dead transitions. [2023-09-01 13:08:49,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 830 places, 2002 transitions, 61000 flow [2023-09-01 13:08:49,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-09-01 13:08:49,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-09-01 13:08:49,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3866 transitions. [2023-09-01 13:08:49,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35409415643890824 [2023-09-01 13:08:49,246 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3866 transitions. [2023-09-01 13:08:49,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3866 transitions. [2023-09-01 13:08:49,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:08:49,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3866 transitions. [2023-09-01 13:08:49,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 72.94339622641509) internal successors, (3866), 53 states have internal predecessors, (3866), 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) [2023-09-01 13:08:49,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 206.0) internal successors, (11124), 54 states have internal predecessors, (11124), 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) [2023-09-01 13:08:49,254 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 206.0) internal successors, (11124), 54 states have internal predecessors, (11124), 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) [2023-09-01 13:08:49,254 INFO L175 Difference]: Start difference. First operand has 778 places, 1855 transitions, 53441 flow. Second operand 53 states and 3866 transitions. [2023-09-01 13:08:49,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 830 places, 2002 transitions, 61000 flow [2023-09-01 13:08:55,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 801 places, 2002 transitions, 59062 flow, removed 725 selfloop flow, removed 29 redundant places. [2023-09-01 13:08:55,229 INFO L231 Difference]: Finished difference. Result has 808 places, 1913 transitions, 55285 flow [2023-09-01 13:08:55,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=51522, PETRI_DIFFERENCE_MINUEND_PLACES=749, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=459, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=55285, PETRI_PLACES=808, PETRI_TRANSITIONS=1913} [2023-09-01 13:08:55,231 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 787 predicate places. [2023-09-01 13:08:55,231 INFO L495 AbstractCegarLoop]: Abstraction has has 808 places, 1913 transitions, 55285 flow [2023-09-01 13:08:55,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 70.38095238095238) internal successors, (2956), 42 states have internal predecessors, (2956), 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) [2023-09-01 13:08:55,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:08:55,231 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:08:55,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-09-01 13:08:55,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:08:55,432 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:08:55,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:08:55,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1616968635, now seen corresponding path program 53 times [2023-09-01 13:08:55,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:08:55,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427687946] [2023-09-01 13:08:55,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:08:55,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:08:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:08:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:08:56,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:08:56,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427687946] [2023-09-01 13:08:56,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427687946] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:08:56,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429507114] [2023-09-01 13:08:56,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:08:56,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:08:56,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:08:56,245 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:08:56,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-09-01 13:08:56,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 13:08:56,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:08:56,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 116 conjunts are in the unsatisfiable core [2023-09-01 13:08:56,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:08:56,484 INFO L350 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 11 treesize of output 7 [2023-09-01 13:08:56,510 INFO L350 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 6 treesize of output 5 [2023-09-01 13:08:56,540 INFO L350 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 6 treesize of output 5 [2023-09-01 13:08:56,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:08:56,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:08:56,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:08:56,841 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:08:56,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 44 treesize of output 59 [2023-09-01 13:08:56,913 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:08:56,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:08:57,270 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 13:08:57,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429507114] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:08:57,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:08:57,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 9] total 36 [2023-09-01 13:08:57,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965617451] [2023-09-01 13:08:57,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:08:57,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-09-01 13:08:57,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:08:57,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-09-01 13:08:57,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2023-09-01 13:08:59,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 206 [2023-09-01 13:08:59,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 808 places, 1913 transitions, 55285 flow. Second operand has 38 states, 38 states have (on average 70.47368421052632) internal successors, (2678), 38 states have internal predecessors, (2678), 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) [2023-09-01 13:08:59,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:08:59,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 206 [2023-09-01 13:08:59,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:09:08,203 INFO L130 PetriNetUnfolder]: 4827/9181 cut-off events. [2023-09-01 13:09:08,204 INFO L131 PetriNetUnfolder]: For 749856/749856 co-relation queries the response was YES. [2023-09-01 13:09:08,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133806 conditions, 9181 events. 4827/9181 cut-off events. For 749856/749856 co-relation queries the response was YES. Maximal size of possible extension queue 705. Compared 74587 event pairs, 652 based on Foata normal form. 7/9188 useless extension candidates. Maximal degree in co-relation 133546. Up to 8073 conditions per place. [2023-09-01 13:09:08,340 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 1585 selfloop transitions, 501 changer transitions 15/2101 dead transitions. [2023-09-01 13:09:08,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 856 places, 2101 transitions, 65747 flow [2023-09-01 13:09:08,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-09-01 13:09:08,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-09-01 13:09:08,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3578 transitions. [2023-09-01 13:09:08,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35446800079255003 [2023-09-01 13:09:08,343 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3578 transitions. [2023-09-01 13:09:08,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3578 transitions. [2023-09-01 13:09:08,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:09:08,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3578 transitions. [2023-09-01 13:09:08,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 73.0204081632653) internal successors, (3578), 49 states have internal predecessors, (3578), 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) [2023-09-01 13:09:08,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 206.0) internal successors, (10300), 50 states have internal predecessors, (10300), 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) [2023-09-01 13:09:08,350 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 206.0) internal successors, (10300), 50 states have internal predecessors, (10300), 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) [2023-09-01 13:09:08,350 INFO L175 Difference]: Start difference. First operand has 808 places, 1913 transitions, 55285 flow. Second operand 49 states and 3578 transitions. [2023-09-01 13:09:08,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 856 places, 2101 transitions, 65747 flow [2023-09-01 13:09:14,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 829 places, 2101 transitions, 64606 flow, removed 450 selfloop flow, removed 27 redundant places. [2023-09-01 13:09:14,986 INFO L231 Difference]: Finished difference. Result has 845 places, 2025 transitions, 60842 flow [2023-09-01 13:09:14,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=54148, PETRI_DIFFERENCE_MINUEND_PLACES=781, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1913, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=412, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=60842, PETRI_PLACES=845, PETRI_TRANSITIONS=2025} [2023-09-01 13:09:14,987 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 824 predicate places. [2023-09-01 13:09:14,987 INFO L495 AbstractCegarLoop]: Abstraction has has 845 places, 2025 transitions, 60842 flow [2023-09-01 13:09:14,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 70.47368421052632) internal successors, (2678), 38 states have internal predecessors, (2678), 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) [2023-09-01 13:09:14,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:09:14,988 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:09:14,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-09-01 13:09:15,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:09:15,193 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:09:15,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:09:15,193 INFO L85 PathProgramCache]: Analyzing trace with hash -815373929, now seen corresponding path program 54 times [2023-09-01 13:09:15,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:09:15,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560365491] [2023-09-01 13:09:15,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:09:15,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:09:15,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:09:16,011 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:09:16,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:09:16,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560365491] [2023-09-01 13:09:16,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560365491] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:09:16,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185669330] [2023-09-01 13:09:16,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:09:16,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:09:16,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:09:16,012 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:09:16,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-09-01 13:09:16,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 13:09:16,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:09:16,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-09-01 13:09:16,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:09:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 13:09:16,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:09:16,583 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:09:16,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-09-01 13:09:16,773 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-09-01 13:09:16,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-09-01 13:09:16,848 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 13:09:16,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185669330] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:09:16,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:09:16,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 31 [2023-09-01 13:09:16,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172440068] [2023-09-01 13:09:16,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:09:16,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 13:09:16,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:09:16,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 13:09:16,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2023-09-01 13:09:18,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 206 [2023-09-01 13:09:18,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 845 places, 2025 transitions, 60842 flow. Second operand has 33 states, 33 states have (on average 70.63636363636364) internal successors, (2331), 33 states have internal predecessors, (2331), 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) [2023-09-01 13:09:18,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:09:18,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 206 [2023-09-01 13:09:18,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:09:26,359 INFO L130 PetriNetUnfolder]: 4972/9466 cut-off events. [2023-09-01 13:09:26,360 INFO L131 PetriNetUnfolder]: For 1064701/1064701 co-relation queries the response was YES. [2023-09-01 13:09:26,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150361 conditions, 9466 events. 4972/9466 cut-off events. For 1064701/1064701 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 77182 event pairs, 733 based on Foata normal form. 8/9474 useless extension candidates. Maximal degree in co-relation 150084. Up to 8944 conditions per place. [2023-09-01 13:09:26,507 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 1953 selfloop transitions, 173 changer transitions 2/2128 dead transitions. [2023-09-01 13:09:26,507 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 869 places, 2128 transitions, 68900 flow [2023-09-01 13:09:26,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 13:09:26,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 13:09:26,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1989 transitions. [2023-09-01 13:09:26,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35760517799352753 [2023-09-01 13:09:26,509 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1989 transitions. [2023-09-01 13:09:26,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1989 transitions. [2023-09-01 13:09:26,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:09:26,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1989 transitions. [2023-09-01 13:09:26,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 73.66666666666667) internal successors, (1989), 27 states have internal predecessors, (1989), 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) [2023-09-01 13:09:26,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 206.0) internal successors, (5768), 28 states have internal predecessors, (5768), 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) [2023-09-01 13:09:26,513 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 206.0) internal successors, (5768), 28 states have internal predecessors, (5768), 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) [2023-09-01 13:09:26,513 INFO L175 Difference]: Start difference. First operand has 845 places, 2025 transitions, 60842 flow. Second operand 27 states and 1989 transitions. [2023-09-01 13:09:26,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 869 places, 2128 transitions, 68900 flow [2023-09-01 13:09:35,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 845 places, 2128 transitions, 64970 flow, removed 1816 selfloop flow, removed 24 redundant places. [2023-09-01 13:09:36,000 INFO L231 Difference]: Finished difference. Result has 852 places, 2067 transitions, 60024 flow [2023-09-01 13:09:36,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=56916, PETRI_DIFFERENCE_MINUEND_PLACES=819, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2025, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1874, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=60024, PETRI_PLACES=852, PETRI_TRANSITIONS=2067} [2023-09-01 13:09:36,001 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 831 predicate places. [2023-09-01 13:09:36,002 INFO L495 AbstractCegarLoop]: Abstraction has has 852 places, 2067 transitions, 60024 flow [2023-09-01 13:09:36,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 70.63636363636364) internal successors, (2331), 33 states have internal predecessors, (2331), 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) [2023-09-01 13:09:36,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:09:36,002 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:09:36,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-09-01 13:09:36,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:09:36,207 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:09:36,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:09:36,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1975367171, now seen corresponding path program 55 times [2023-09-01 13:09:36,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:09:36,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634118655] [2023-09-01 13:09:36,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:09:36,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:09:36,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:09:36,891 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:09:36,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:09:36,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634118655] [2023-09-01 13:09:36,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634118655] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:09:36,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925358261] [2023-09-01 13:09:36,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:09:36,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:09:36,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:09:36,892 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:09:36,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-09-01 13:09:37,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:09:37,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 108 conjunts are in the unsatisfiable core [2023-09-01 13:09:37,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:09:37,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:09:37,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2023-09-01 13:09:37,396 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:09:37,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:09:37,704 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (select |c_#memory_int| c_~A~0.base)) (.cse7 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset 8)) (.cse4 (+ c_~A~0.offset 4)) (.cse0 (select .cse6 (+ c_~A~0.offset .cse7))) (.cse1 (select .cse6 (+ c_~A~0.offset .cse7 4)))) (and (forall ((v_ArrVal_2082 (Array Int Int))) (<= (+ .cse0 c_~counter~0 .cse1) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2082) c_~A~0.base))) (+ (select .cse2 c_~A~0.offset) (select .cse2 .cse3) (select .cse2 .cse4))))) (forall ((v_ArrVal_2082 (Array Int Int))) (< (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2082) c_~A~0.base))) (+ (select .cse5 c_~A~0.offset) (select .cse5 .cse3) (select .cse5 .cse4))) (+ .cse0 c_~counter~0 .cse1 1)))))) is different from false [2023-09-01 13:09:37,738 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:09:37,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 118 [2023-09-01 13:09:37,744 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:09:37,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 14 [2023-09-01 13:09:37,903 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:09:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2023-09-01 13:09:38,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925358261] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:09:38,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:09:38,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 37 [2023-09-01 13:09:38,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263887938] [2023-09-01 13:09:38,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:09:38,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-09-01 13:09:38,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:09:38,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-09-01 13:09:38,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1242, Unknown=28, NotChecked=72, Total=1482 [2023-09-01 13:09:38,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-09-01 13:09:38,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 852 places, 2067 transitions, 60024 flow. Second operand has 39 states, 39 states have (on average 54.43589743589744) internal successors, (2123), 39 states have internal predecessors, (2123), 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) [2023-09-01 13:09:38,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:09:38,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-09-01 13:09:38,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:09:47,418 INFO L130 PetriNetUnfolder]: 5124/9766 cut-off events. [2023-09-01 13:09:47,418 INFO L131 PetriNetUnfolder]: For 1093722/1093722 co-relation queries the response was YES. [2023-09-01 13:09:47,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151394 conditions, 9766 events. 5124/9766 cut-off events. For 1093722/1093722 co-relation queries the response was YES. Maximal size of possible extension queue 758. Compared 80305 event pairs, 633 based on Foata normal form. 4/9770 useless extension candidates. Maximal degree in co-relation 151114. Up to 8232 conditions per place. [2023-09-01 13:09:47,585 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 1622 selfloop transitions, 565 changer transitions 1/2188 dead transitions. [2023-09-01 13:09:47,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 884 places, 2188 transitions, 68137 flow [2023-09-01 13:09:47,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 13:09:47,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 13:09:47,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1890 transitions. [2023-09-01 13:09:47,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2780229479258605 [2023-09-01 13:09:47,601 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1890 transitions. [2023-09-01 13:09:47,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1890 transitions. [2023-09-01 13:09:47,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:09:47,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1890 transitions. [2023-09-01 13:09:47,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 57.27272727272727) internal successors, (1890), 33 states have internal predecessors, (1890), 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) [2023-09-01 13:09:47,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 206.0) internal successors, (7004), 34 states have internal predecessors, (7004), 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) [2023-09-01 13:09:47,621 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 206.0) internal successors, (7004), 34 states have internal predecessors, (7004), 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) [2023-09-01 13:09:47,622 INFO L175 Difference]: Start difference. First operand has 852 places, 2067 transitions, 60024 flow. Second operand 33 states and 1890 transitions. [2023-09-01 13:09:47,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 884 places, 2188 transitions, 68137 flow [2023-09-01 13:09:58,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 868 places, 2188 transitions, 66250 flow, removed 860 selfloop flow, removed 16 redundant places. [2023-09-01 13:09:58,344 INFO L231 Difference]: Finished difference. Result has 875 places, 2135 transitions, 62657 flow [2023-09-01 13:09:58,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=58149, PETRI_DIFFERENCE_MINUEND_PLACES=836, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2067, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=501, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=62657, PETRI_PLACES=875, PETRI_TRANSITIONS=2135} [2023-09-01 13:09:58,345 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 854 predicate places. [2023-09-01 13:09:58,345 INFO L495 AbstractCegarLoop]: Abstraction has has 875 places, 2135 transitions, 62657 flow [2023-09-01 13:09:58,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 54.43589743589744) internal successors, (2123), 39 states have internal predecessors, (2123), 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) [2023-09-01 13:09:58,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:09:58,346 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:09:58,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2023-09-01 13:09:58,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-09-01 13:09:58,551 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:09:58,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:09:58,551 INFO L85 PathProgramCache]: Analyzing trace with hash -793641339, now seen corresponding path program 56 times [2023-09-01 13:09:58,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:09:58,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325215434] [2023-09-01 13:09:58,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:09:58,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:09:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:09:59,323 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:09:59,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:09:59,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325215434] [2023-09-01 13:09:59,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325215434] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:09:59,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961433597] [2023-09-01 13:09:59,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:09:59,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:09:59,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:09:59,325 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:09:59,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-09-01 13:09:59,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:09:59,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:09:59,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-09-01 13:09:59,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:09:59,803 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:09:59,804 INFO L350 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 15 treesize of output 14 [2023-09-01 13:09:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:09:59,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:10:00,393 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:10:00,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 110 [2023-09-01 13:10:00,822 INFO L321 Elim1Store]: treesize reduction 44, result has 55.6 percent of original size [2023-09-01 13:10:00,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 65 [2023-09-01 13:10:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:10:01,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961433597] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:10:01,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:10:01,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-09-01 13:10:01,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236105290] [2023-09-01 13:10:01,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:10:01,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-09-01 13:10:01,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:10:01,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-09-01 13:10:01,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2023-09-01 13:10:05,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 206 [2023-09-01 13:10:05,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 875 places, 2135 transitions, 62657 flow. Second operand has 42 states, 42 states have (on average 70.38095238095238) internal successors, (2956), 42 states have internal predecessors, (2956), 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) [2023-09-01 13:10:05,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:10:05,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 206 [2023-09-01 13:10:05,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:10:14,247 INFO L130 PetriNetUnfolder]: 5197/9923 cut-off events. [2023-09-01 13:10:14,248 INFO L131 PetriNetUnfolder]: For 1122712/1122712 co-relation queries the response was YES. [2023-09-01 13:10:14,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156196 conditions, 9923 events. 5197/9923 cut-off events. For 1122712/1122712 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 82001 event pairs, 760 based on Foata normal form. 6/9929 useless extension candidates. Maximal degree in co-relation 155908. Up to 9275 conditions per place. [2023-09-01 13:10:14,445 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 1930 selfloop transitions, 294 changer transitions 6/2230 dead transitions. [2023-09-01 13:10:14,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 911 places, 2230 transitions, 70239 flow [2023-09-01 13:10:14,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 13:10:14,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 13:10:14,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2706 transitions. [2023-09-01 13:10:14,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3550249278404618 [2023-09-01 13:10:14,449 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2706 transitions. [2023-09-01 13:10:14,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2706 transitions. [2023-09-01 13:10:14,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:10:14,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2706 transitions. [2023-09-01 13:10:14,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 73.13513513513513) internal successors, (2706), 37 states have internal predecessors, (2706), 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) [2023-09-01 13:10:14,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 206.0) internal successors, (7828), 38 states have internal predecessors, (7828), 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) [2023-09-01 13:10:14,455 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 206.0) internal successors, (7828), 38 states have internal predecessors, (7828), 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) [2023-09-01 13:10:14,455 INFO L175 Difference]: Start difference. First operand has 875 places, 2135 transitions, 62657 flow. Second operand 37 states and 2706 transitions. [2023-09-01 13:10:14,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 911 places, 2230 transitions, 70239 flow [2023-09-01 13:10:25,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 889 places, 2230 transitions, 68515 flow, removed 571 selfloop flow, removed 22 redundant places. [2023-09-01 13:10:25,323 INFO L231 Difference]: Finished difference. Result has 893 places, 2165 transitions, 63609 flow [2023-09-01 13:10:25,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=60941, PETRI_DIFFERENCE_MINUEND_PLACES=853, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1859, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=63609, PETRI_PLACES=893, PETRI_TRANSITIONS=2165} [2023-09-01 13:10:25,325 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 872 predicate places. [2023-09-01 13:10:25,325 INFO L495 AbstractCegarLoop]: Abstraction has has 893 places, 2165 transitions, 63609 flow [2023-09-01 13:10:25,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 70.38095238095238) internal successors, (2956), 42 states have internal predecessors, (2956), 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) [2023-09-01 13:10:25,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:10:25,325 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:10:25,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-09-01 13:10:25,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2023-09-01 13:10:25,531 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:10:25,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:10:25,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1510122787, now seen corresponding path program 57 times [2023-09-01 13:10:25,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:10:25,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287461196] [2023-09-01 13:10:25,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:10:25,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:10:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:10:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:10:26,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:10:26,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287461196] [2023-09-01 13:10:26,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287461196] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:10:26,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473197319] [2023-09-01 13:10:26,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:10:26,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:10:26,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:10:26,271 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:10:26,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-09-01 13:10:26,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 13:10:26,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:10:26,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2023-09-01 13:10:26,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:10:26,555 INFO L350 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 13 treesize of output 9 [2023-09-01 13:10:26,591 INFO L350 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 6 treesize of output 5 [2023-09-01 13:10:26,608 INFO L350 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 6 treesize of output 5 [2023-09-01 13:10:26,745 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:10:26,745 INFO L350 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 17 treesize of output 14 [2023-09-01 13:10:26,814 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:10:26,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:10:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:10:27,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473197319] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:10:27,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:10:27,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 10] total 37 [2023-09-01 13:10:27,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733842979] [2023-09-01 13:10:27,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:10:27,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-09-01 13:10:27,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:10:27,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-09-01 13:10:27,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2023-09-01 13:10:29,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 206 [2023-09-01 13:10:29,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 893 places, 2165 transitions, 63609 flow. Second operand has 39 states, 39 states have (on average 69.53846153846153) internal successors, (2712), 39 states have internal predecessors, (2712), 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) [2023-09-01 13:10:29,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:10:29,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 206 [2023-09-01 13:10:29,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:10:39,415 INFO L130 PetriNetUnfolder]: 5307/10124 cut-off events. [2023-09-01 13:10:39,415 INFO L131 PetriNetUnfolder]: For 1172547/1172547 co-relation queries the response was YES. [2023-09-01 13:10:39,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160794 conditions, 10124 events. 5307/10124 cut-off events. For 1172547/1172547 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 84329 event pairs, 827 based on Foata normal form. 3/10127 useless extension candidates. Maximal degree in co-relation 160503. Up to 9510 conditions per place. [2023-09-01 13:10:39,581 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 1957 selfloop transitions, 310 changer transitions 7/2274 dead transitions. [2023-09-01 13:10:39,581 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 928 places, 2274 transitions, 72136 flow [2023-09-01 13:10:39,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-09-01 13:10:39,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-09-01 13:10:39,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2598 transitions. [2023-09-01 13:10:39,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35032362459546923 [2023-09-01 13:10:39,583 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2598 transitions. [2023-09-01 13:10:39,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2598 transitions. [2023-09-01 13:10:39,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:10:39,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2598 transitions. [2023-09-01 13:10:39,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 72.16666666666667) internal successors, (2598), 36 states have internal predecessors, (2598), 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) [2023-09-01 13:10:39,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 206.0) internal successors, (7622), 37 states have internal predecessors, (7622), 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) [2023-09-01 13:10:39,589 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 206.0) internal successors, (7622), 37 states have internal predecessors, (7622), 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) [2023-09-01 13:10:39,589 INFO L175 Difference]: Start difference. First operand has 893 places, 2165 transitions, 63609 flow. Second operand 36 states and 2598 transitions. [2023-09-01 13:10:39,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 928 places, 2274 transitions, 72136 flow [2023-09-01 13:10:53,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 902 places, 2274 transitions, 71355 flow, removed 306 selfloop flow, removed 26 redundant places. [2023-09-01 13:10:53,782 INFO L231 Difference]: Finished difference. Result has 911 places, 2210 transitions, 66602 flow [2023-09-01 13:10:53,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=62828, PETRI_DIFFERENCE_MINUEND_PLACES=867, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1869, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=66602, PETRI_PLACES=911, PETRI_TRANSITIONS=2210} [2023-09-01 13:10:53,783 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 890 predicate places. [2023-09-01 13:10:53,783 INFO L495 AbstractCegarLoop]: Abstraction has has 911 places, 2210 transitions, 66602 flow [2023-09-01 13:10:53,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 69.53846153846153) internal successors, (2712), 39 states have internal predecessors, (2712), 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) [2023-09-01 13:10:53,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:10:53,785 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:10:53,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2023-09-01 13:10:53,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-09-01 13:10:53,990 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:10:53,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:10:53,990 INFO L85 PathProgramCache]: Analyzing trace with hash -227284521, now seen corresponding path program 58 times [2023-09-01 13:10:53,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:10:53,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127385119] [2023-09-01 13:10:53,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:10:53,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:10:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:10:54,598 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:10:54,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:10:54,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127385119] [2023-09-01 13:10:54,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127385119] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:10:54,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138452565] [2023-09-01 13:10:54,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:10:54,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:10:54,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:10:54,599 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:10:54,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-09-01 13:10:54,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:10:54,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:10:54,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-09-01 13:10:54,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:10:55,097 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:10:55,098 INFO L350 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 15 treesize of output 14 [2023-09-01 13:10:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:10:55,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:10:55,588 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:10:55,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 113 [2023-09-01 13:10:55,898 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-09-01 13:10:55,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 66 [2023-09-01 13:10:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:10:56,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138452565] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:10:56,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:10:56,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2023-09-01 13:10:56,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494063616] [2023-09-01 13:10:56,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:10:56,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-09-01 13:10:56,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:10:56,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-09-01 13:10:56,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2023-09-01 13:10:58,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 206 [2023-09-01 13:10:58,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 911 places, 2210 transitions, 66602 flow. Second operand has 41 states, 41 states have (on average 75.41463414634147) internal successors, (3092), 41 states have internal predecessors, (3092), 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) [2023-09-01 13:10:58,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:10:58,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 206 [2023-09-01 13:10:58,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:11:09,050 INFO L130 PetriNetUnfolder]: 5523/10523 cut-off events. [2023-09-01 13:11:09,051 INFO L131 PetriNetUnfolder]: For 1333822/1333822 co-relation queries the response was YES. [2023-09-01 13:11:09,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172982 conditions, 10523 events. 5523/10523 cut-off events. For 1333822/1333822 co-relation queries the response was YES. Maximal size of possible extension queue 824. Compared 87413 event pairs, 801 based on Foata normal form. 6/10529 useless extension candidates. Maximal degree in co-relation 172681. Up to 9834 conditions per place. [2023-09-01 13:11:09,234 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 2073 selfloop transitions, 335 changer transitions 6/2414 dead transitions. [2023-09-01 13:11:09,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 948 places, 2414 transitions, 78745 flow [2023-09-01 13:11:09,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-09-01 13:11:09,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-09-01 13:11:09,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3047 transitions. [2023-09-01 13:11:09,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37926313169031617 [2023-09-01 13:11:09,237 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3047 transitions. [2023-09-01 13:11:09,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3047 transitions. [2023-09-01 13:11:09,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:11:09,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3047 transitions. [2023-09-01 13:11:09,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 78.12820512820512) internal successors, (3047), 39 states have internal predecessors, (3047), 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) [2023-09-01 13:11:09,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 206.0) internal successors, (8240), 40 states have internal predecessors, (8240), 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) [2023-09-01 13:11:09,401 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 206.0) internal successors, (8240), 40 states have internal predecessors, (8240), 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) [2023-09-01 13:11:09,401 INFO L175 Difference]: Start difference. First operand has 911 places, 2210 transitions, 66602 flow. Second operand 39 states and 3047 transitions. [2023-09-01 13:11:09,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 948 places, 2414 transitions, 78745 flow [2023-09-01 13:11:24,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 925 places, 2414 transitions, 76998 flow, removed 751 selfloop flow, removed 23 redundant places. [2023-09-01 13:11:24,881 INFO L231 Difference]: Finished difference. Result has 931 places, 2328 transitions, 71794 flow [2023-09-01 13:11:24,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=64889, PETRI_DIFFERENCE_MINUEND_PLACES=887, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1930, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=71794, PETRI_PLACES=931, PETRI_TRANSITIONS=2328} [2023-09-01 13:11:24,883 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 910 predicate places. [2023-09-01 13:11:24,883 INFO L495 AbstractCegarLoop]: Abstraction has has 931 places, 2328 transitions, 71794 flow [2023-09-01 13:11:24,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 75.41463414634147) internal successors, (3092), 41 states have internal predecessors, (3092), 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) [2023-09-01 13:11:24,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:11:24,883 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:11:24,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2023-09-01 13:11:25,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:11:25,089 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:11:25,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:11:25,089 INFO L85 PathProgramCache]: Analyzing trace with hash 2121343109, now seen corresponding path program 59 times [2023-09-01 13:11:25,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:11:25,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511327666] [2023-09-01 13:11:25,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:11:25,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:11:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:11:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:11:25,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:11:25,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511327666] [2023-09-01 13:11:25,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511327666] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:11:25,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024981523] [2023-09-01 13:11:25,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:11:25,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:11:25,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:11:25,908 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:11:25,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-09-01 13:11:26,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 13:11:26,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:11:26,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 104 conjunts are in the unsatisfiable core [2023-09-01 13:11:26,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:11:26,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:11:26,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-09-01 13:11:26,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 13:11:26,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:11:26,519 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (.cse1 (+ c_~A~0.offset 4)) (.cse2 (+ c_~A~0.offset 8))) (and (forall ((v_ArrVal_2239 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2239) c_~A~0.base))) (< (+ (select .cse0 .cse1) (select .cse0 c_~A~0.offset) (select .cse0 .cse2)) (+ c_~counter~0 (select .cse0 .cse3) 1)))) (forall ((v_ArrVal_2239 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2239) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse4 .cse3)) (+ (select .cse4 .cse1) (select .cse4 c_~A~0.offset) (select .cse4 .cse2))))))) is different from false [2023-09-01 13:11:26,527 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset 4)) (.cse4 (+ c_~A~0.offset 8)) (.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse6))) (.cse2 (+ c_~A~0.offset .cse6 4))) (and (forall ((v_ArrVal_2239 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2239) c_~A~0.base))) (<= (+ .cse0 c_~counter~0 (select .cse1 .cse2)) (+ (select .cse1 .cse3) (select .cse1 c_~A~0.offset) (select .cse1 .cse4))))) (forall ((v_ArrVal_2239 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2239) c_~A~0.base))) (< (+ (select .cse5 .cse3) (select .cse5 c_~A~0.offset) (select .cse5 .cse4)) (+ .cse0 c_~counter~0 (select .cse5 .cse2) 1))))))) is different from false [2023-09-01 13:11:26,564 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:11:26,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 125 [2023-09-01 13:11:26,578 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:11:26,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 43 [2023-09-01 13:11:26,775 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:11:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2023-09-01 13:11:26,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024981523] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:11:26,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:11:26,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2023-09-01 13:11:26,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002865960] [2023-09-01 13:11:26,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:11:26,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-09-01 13:11:26,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:11:26,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-09-01 13:11:26,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1061, Unknown=2, NotChecked=134, Total=1332 [2023-09-01 13:11:26,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-09-01 13:11:26,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 931 places, 2328 transitions, 71794 flow. Second operand has 37 states, 37 states have (on average 54.45945945945946) internal successors, (2015), 37 states have internal predecessors, (2015), 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) [2023-09-01 13:11:26,992 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:11:26,992 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-09-01 13:11:26,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:11:37,264 INFO L130 PetriNetUnfolder]: 5610/10683 cut-off events. [2023-09-01 13:11:37,264 INFO L131 PetriNetUnfolder]: For 1373479/1373479 co-relation queries the response was YES. [2023-09-01 13:11:37,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176854 conditions, 10683 events. 5610/10683 cut-off events. For 1373479/1373479 co-relation queries the response was YES. Maximal size of possible extension queue 823. Compared 89390 event pairs, 778 based on Foata normal form. 5/10688 useless extension candidates. Maximal degree in co-relation 176547. Up to 9226 conditions per place. [2023-09-01 13:11:37,446 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 1759 selfloop transitions, 645 changer transitions 1/2405 dead transitions. [2023-09-01 13:11:37,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 959 places, 2405 transitions, 79547 flow [2023-09-01 13:11:37,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-09-01 13:11:37,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-09-01 13:11:37,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1665 transitions. [2023-09-01 13:11:37,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2787077335118848 [2023-09-01 13:11:37,448 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1665 transitions. [2023-09-01 13:11:37,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1665 transitions. [2023-09-01 13:11:37,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:11:37,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1665 transitions. [2023-09-01 13:11:37,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 57.41379310344828) internal successors, (1665), 29 states have internal predecessors, (1665), 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) [2023-09-01 13:11:37,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 206.0) internal successors, (6180), 30 states have internal predecessors, (6180), 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) [2023-09-01 13:11:37,453 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 206.0) internal successors, (6180), 30 states have internal predecessors, (6180), 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) [2023-09-01 13:11:37,453 INFO L175 Difference]: Start difference. First operand has 931 places, 2328 transitions, 71794 flow. Second operand 29 states and 1665 transitions. [2023-09-01 13:11:37,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 959 places, 2405 transitions, 79547 flow [2023-09-01 13:11:50,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 939 places, 2405 transitions, 78891 flow, removed 229 selfloop flow, removed 20 redundant places. [2023-09-01 13:11:50,466 INFO L231 Difference]: Finished difference. Result has 943 places, 2355 transitions, 74590 flow [2023-09-01 13:11:50,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=71138, PETRI_DIFFERENCE_MINUEND_PLACES=911, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=625, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1693, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=74590, PETRI_PLACES=943, PETRI_TRANSITIONS=2355} [2023-09-01 13:11:50,467 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 922 predicate places. [2023-09-01 13:11:50,467 INFO L495 AbstractCegarLoop]: Abstraction has has 943 places, 2355 transitions, 74590 flow [2023-09-01 13:11:50,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 54.45945945945946) internal successors, (2015), 37 states have internal predecessors, (2015), 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) [2023-09-01 13:11:50,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:11:50,468 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:11:50,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-09-01 13:11:50,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:11:50,668 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:11:50,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:11:50,669 INFO L85 PathProgramCache]: Analyzing trace with hash -355812831, now seen corresponding path program 60 times [2023-09-01 13:11:50,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:11:50,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853287448] [2023-09-01 13:11:50,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:11:50,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:11:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:11:51,442 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:11:51,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:11:51,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853287448] [2023-09-01 13:11:51,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853287448] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:11:51,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315443364] [2023-09-01 13:11:51,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:11:51,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:11:51,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:11:51,444 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:11:51,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-09-01 13:11:51,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 13:11:51,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:11:51,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-09-01 13:11:51,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:11:51,981 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:11:51,981 INFO L350 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 15 treesize of output 14 [2023-09-01 13:11:52,046 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:11:52,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:11:52,465 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:11:52,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 113 [2023-09-01 13:11:52,906 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-09-01 13:11:52,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 66 [2023-09-01 13:11:53,243 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:11:53,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315443364] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:11:53,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:11:53,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-09-01 13:11:53,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540076629] [2023-09-01 13:11:53,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:11:53,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-09-01 13:11:53,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:11:53,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-09-01 13:11:53,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1586, Unknown=0, NotChecked=0, Total=1806 [2023-09-01 13:11:56,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 206 [2023-09-01 13:11:56,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 943 places, 2355 transitions, 74590 flow. Second operand has 43 states, 43 states have (on average 69.4186046511628) internal successors, (2985), 43 states have internal predecessors, (2985), 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) [2023-09-01 13:11:56,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:11:56,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 206 [2023-09-01 13:11:56,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:12:09,733 INFO L130 PetriNetUnfolder]: 5688/10830 cut-off events. [2023-09-01 13:12:09,733 INFO L131 PetriNetUnfolder]: For 1418522/1418522 co-relation queries the response was YES. [2023-09-01 13:12:09,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182013 conditions, 10830 events. 5688/10830 cut-off events. For 1418522/1418522 co-relation queries the response was YES. Maximal size of possible extension queue 868. Compared 90469 event pairs, 800 based on Foata normal form. 3/10833 useless extension candidates. Maximal degree in co-relation 181701. Up to 9868 conditions per place. [2023-09-01 13:12:09,944 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 1964 selfloop transitions, 491 changer transitions 5/2460 dead transitions. [2023-09-01 13:12:09,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 997 places, 2460 transitions, 82658 flow [2023-09-01 13:12:09,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-09-01 13:12:09,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-09-01 13:12:09,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3955 transitions. [2023-09-01 13:12:09,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34907325684024715 [2023-09-01 13:12:09,947 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3955 transitions. [2023-09-01 13:12:09,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3955 transitions. [2023-09-01 13:12:09,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:12:09,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3955 transitions. [2023-09-01 13:12:09,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 71.9090909090909) internal successors, (3955), 55 states have internal predecessors, (3955), 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) [2023-09-01 13:12:09,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 206.0) internal successors, (11536), 56 states have internal predecessors, (11536), 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) [2023-09-01 13:12:09,956 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 206.0) internal successors, (11536), 56 states have internal predecessors, (11536), 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) [2023-09-01 13:12:09,956 INFO L175 Difference]: Start difference. First operand has 943 places, 2355 transitions, 74590 flow. Second operand 55 states and 3955 transitions. [2023-09-01 13:12:09,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 997 places, 2460 transitions, 82658 flow [2023-09-01 13:12:26,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 977 places, 2460 transitions, 80913 flow, removed 533 selfloop flow, removed 20 redundant places. [2023-09-01 13:12:26,482 INFO L231 Difference]: Finished difference. Result has 982 places, 2385 transitions, 76155 flow [2023-09-01 13:12:26,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=72849, PETRI_DIFFERENCE_MINUEND_PLACES=923, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=468, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1876, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=76155, PETRI_PLACES=982, PETRI_TRANSITIONS=2385} [2023-09-01 13:12:26,484 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 961 predicate places. [2023-09-01 13:12:26,484 INFO L495 AbstractCegarLoop]: Abstraction has has 982 places, 2385 transitions, 76155 flow [2023-09-01 13:12:26,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 69.4186046511628) internal successors, (2985), 43 states have internal predecessors, (2985), 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) [2023-09-01 13:12:26,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:12:26,485 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:12:26,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-09-01 13:12:26,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-09-01 13:12:26,690 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:12:26,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:12:26,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1331496917, now seen corresponding path program 61 times [2023-09-01 13:12:26,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:12:26,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469358276] [2023-09-01 13:12:26,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:12:26,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:12:26,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:12:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:12:27,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:12:27,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469358276] [2023-09-01 13:12:27,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469358276] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:12:27,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375914842] [2023-09-01 13:12:27,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:12:27,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:12:27,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:12:27,456 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:12:27,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-09-01 13:12:27,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:12:27,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-09-01 13:12:27,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:12:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:12:27,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:12:28,100 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:12:28,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-09-01 13:12:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 13:12:28,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375914842] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:12:28,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:12:28,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-09-01 13:12:28,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614127069] [2023-09-01 13:12:28,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:12:28,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 13:12:28,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:12:28,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 13:12:28,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2023-09-01 13:12:30,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 206 [2023-09-01 13:12:30,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 982 places, 2385 transitions, 76155 flow. Second operand has 35 states, 35 states have (on average 70.6) internal successors, (2471), 35 states have internal predecessors, (2471), 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) [2023-09-01 13:12:30,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:12:30,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 206 [2023-09-01 13:12:30,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:12:41,987 INFO L130 PetriNetUnfolder]: 5767/11003 cut-off events. [2023-09-01 13:12:41,987 INFO L131 PetriNetUnfolder]: For 1526374/1526374 co-relation queries the response was YES. [2023-09-01 13:12:42,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188000 conditions, 11003 events. 5767/11003 cut-off events. For 1526374/1526374 co-relation queries the response was YES. Maximal size of possible extension queue 855. Compared 92835 event pairs, 843 based on Foata normal form. 6/11009 useless extension candidates. Maximal degree in co-relation 187683. Up to 10060 conditions per place. [2023-09-01 13:12:42,190 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 2020 selfloop transitions, 445 changer transitions 4/2469 dead transitions. [2023-09-01 13:12:42,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1010 places, 2469 transitions, 84743 flow [2023-09-01 13:12:42,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-09-01 13:12:42,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-09-01 13:12:42,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2125 transitions. [2023-09-01 13:12:42,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3557080682959491 [2023-09-01 13:12:42,193 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2125 transitions. [2023-09-01 13:12:42,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2125 transitions. [2023-09-01 13:12:42,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:12:42,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2125 transitions. [2023-09-01 13:12:42,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 73.27586206896552) internal successors, (2125), 29 states have internal predecessors, (2125), 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) [2023-09-01 13:12:42,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 206.0) internal successors, (6180), 30 states have internal predecessors, (6180), 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) [2023-09-01 13:12:42,197 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 206.0) internal successors, (6180), 30 states have internal predecessors, (6180), 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) [2023-09-01 13:12:42,197 INFO L175 Difference]: Start difference. First operand has 982 places, 2385 transitions, 76155 flow. Second operand 29 states and 2125 transitions. [2023-09-01 13:12:42,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1010 places, 2469 transitions, 84743 flow [2023-09-01 13:12:58,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 978 places, 2469 transitions, 83283 flow, removed 585 selfloop flow, removed 32 redundant places. [2023-09-01 13:12:58,326 INFO L231 Difference]: Finished difference. Result has 983 places, 2413 transitions, 78102 flow [2023-09-01 13:12:58,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=74695, PETRI_DIFFERENCE_MINUEND_PLACES=950, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=422, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1950, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=78102, PETRI_PLACES=983, PETRI_TRANSITIONS=2413} [2023-09-01 13:12:58,327 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 962 predicate places. [2023-09-01 13:12:58,328 INFO L495 AbstractCegarLoop]: Abstraction has has 983 places, 2413 transitions, 78102 flow [2023-09-01 13:12:58,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 70.6) internal successors, (2471), 35 states have internal predecessors, (2471), 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) [2023-09-01 13:12:58,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:12:58,328 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:12:58,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-09-01 13:12:58,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-09-01 13:12:58,533 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:12:58,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:12:58,534 INFO L85 PathProgramCache]: Analyzing trace with hash 19373079, now seen corresponding path program 62 times [2023-09-01 13:12:58,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:12:58,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19042222] [2023-09-01 13:12:58,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:12:58,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:12:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:12:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:12:59,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:12:59,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19042222] [2023-09-01 13:12:59,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19042222] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:12:59,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437956517] [2023-09-01 13:12:59,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:12:59,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:12:59,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:12:59,284 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:12:59,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-09-01 13:12:59,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:12:59,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:12:59,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 107 conjunts are in the unsatisfiable core [2023-09-01 13:12:59,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:12:59,775 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:12:59,777 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:12:59,777 INFO L350 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 15 treesize of output 9 [2023-09-01 13:12:59,798 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:12:59,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:13:00,279 INFO L321 Elim1Store]: treesize reduction 16, result has 83.8 percent of original size [2023-09-01 13:13:00,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 94 [2023-09-01 13:13:00,457 INFO L321 Elim1Store]: treesize reduction 86, result has 13.1 percent of original size [2023-09-01 13:13:00,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 23 [2023-09-01 13:13:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:13:00,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437956517] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:13:00,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:13:00,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 39 [2023-09-01 13:13:00,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101233935] [2023-09-01 13:13:00,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:13:00,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-09-01 13:13:00,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:13:00,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-09-01 13:13:00,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2023-09-01 13:13:03,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 206 [2023-09-01 13:13:03,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 983 places, 2413 transitions, 78102 flow. Second operand has 41 states, 41 states have (on average 69.41463414634147) internal successors, (2846), 41 states have internal predecessors, (2846), 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) [2023-09-01 13:13:03,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:13:03,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 206 [2023-09-01 13:13:03,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:13:06,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:13:14,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:13:24,134 INFO L130 PetriNetUnfolder]: 6014/11444 cut-off events. [2023-09-01 13:13:24,134 INFO L131 PetriNetUnfolder]: For 1652207/1652207 co-relation queries the response was YES. [2023-09-01 13:13:24,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200796 conditions, 11444 events. 6014/11444 cut-off events. For 1652207/1652207 co-relation queries the response was YES. Maximal size of possible extension queue 936. Compared 96788 event pairs, 66 based on Foata normal form. 6/11450 useless extension candidates. Maximal degree in co-relation 200473. Up to 6421 conditions per place. [2023-09-01 13:13:24,366 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 1824 selfloop transitions, 763 changer transitions 35/2622 dead transitions. [2023-09-01 13:13:24,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1031 places, 2622 transitions, 92994 flow [2023-09-01 13:13:24,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-09-01 13:13:24,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-09-01 13:13:24,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3543 transitions. [2023-09-01 13:13:24,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3510005944125223 [2023-09-01 13:13:24,369 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3543 transitions. [2023-09-01 13:13:24,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3543 transitions. [2023-09-01 13:13:24,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:13:24,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3543 transitions. [2023-09-01 13:13:24,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 72.3061224489796) internal successors, (3543), 49 states have internal predecessors, (3543), 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) [2023-09-01 13:13:24,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 206.0) internal successors, (10300), 50 states have internal predecessors, (10300), 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) [2023-09-01 13:13:24,378 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 206.0) internal successors, (10300), 50 states have internal predecessors, (10300), 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) [2023-09-01 13:13:24,378 INFO L175 Difference]: Start difference. First operand has 983 places, 2413 transitions, 78102 flow. Second operand 49 states and 3543 transitions. [2023-09-01 13:13:24,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1031 places, 2622 transitions, 92994 flow [2023-09-01 13:13:43,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1013 places, 2622 transitions, 91707 flow, removed 552 selfloop flow, removed 18 redundant places. [2023-09-01 13:13:43,435 INFO L231 Difference]: Finished difference. Result has 1019 places, 2509 transitions, 85336 flow [2023-09-01 13:13:43,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=76815, PETRI_DIFFERENCE_MINUEND_PLACES=965, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=687, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=85336, PETRI_PLACES=1019, PETRI_TRANSITIONS=2509} [2023-09-01 13:13:43,450 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 998 predicate places. [2023-09-01 13:13:43,450 INFO L495 AbstractCegarLoop]: Abstraction has has 1019 places, 2509 transitions, 85336 flow [2023-09-01 13:13:43,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 69.41463414634147) internal successors, (2846), 41 states have internal predecessors, (2846), 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) [2023-09-01 13:13:43,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:13:43,451 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:13:43,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-09-01 13:13:43,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:13:43,652 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:13:43,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:13:43,652 INFO L85 PathProgramCache]: Analyzing trace with hash 259716089, now seen corresponding path program 63 times [2023-09-01 13:13:43,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:13:43,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194007900] [2023-09-01 13:13:43,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:13:43,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:13:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:13:44,238 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:13:44,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:13:44,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194007900] [2023-09-01 13:13:44,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194007900] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:13:44,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483212018] [2023-09-01 13:13:44,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:13:44,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:13:44,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:13:44,239 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:13:44,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-09-01 13:13:44,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 13:13:44,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:13:44,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2023-09-01 13:13:44,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:13:44,490 INFO L350 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 13 treesize of output 9 [2023-09-01 13:13:44,544 INFO L350 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 6 treesize of output 5 [2023-09-01 13:13:44,583 INFO L350 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 6 treesize of output 5 [2023-09-01 13:13:44,777 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:13:44,778 INFO L350 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 17 treesize of output 14 [2023-09-01 13:13:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:13:44,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:13:45,251 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:13:45,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483212018] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:13:45,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:13:45,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 10] total 36 [2023-09-01 13:13:45,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175577244] [2023-09-01 13:13:45,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:13:45,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-09-01 13:13:45,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:13:45,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-09-01 13:13:45,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2023-09-01 13:13:46,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 206 [2023-09-01 13:13:46,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1019 places, 2509 transitions, 85336 flow. Second operand has 38 states, 38 states have (on average 69.57894736842105) internal successors, (2644), 38 states have internal predecessors, (2644), 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) [2023-09-01 13:13:46,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:13:46,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 206 [2023-09-01 13:13:46,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:14:01,499 INFO L130 PetriNetUnfolder]: 6200/11793 cut-off events. [2023-09-01 13:14:01,499 INFO L131 PetriNetUnfolder]: For 1775721/1775721 co-relation queries the response was YES. [2023-09-01 13:14:01,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211168 conditions, 11793 events. 6200/11793 cut-off events. For 1775721/1775721 co-relation queries the response was YES. Maximal size of possible extension queue 965. Compared 99934 event pairs, 899 based on Foata normal form. 2/11795 useless extension candidates. Maximal degree in co-relation 210838. Up to 10749 conditions per place. [2023-09-01 13:14:01,881 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 2250 selfloop transitions, 413 changer transitions 7/2670 dead transitions. [2023-09-01 13:14:01,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1057 places, 2670 transitions, 96612 flow [2023-09-01 13:14:01,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-09-01 13:14:01,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-09-01 13:14:01,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2825 transitions. [2023-09-01 13:14:01,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.351630570077172 [2023-09-01 13:14:01,883 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2825 transitions. [2023-09-01 13:14:01,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2825 transitions. [2023-09-01 13:14:01,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:14:01,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2825 transitions. [2023-09-01 13:14:01,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 72.43589743589743) internal successors, (2825), 39 states have internal predecessors, (2825), 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) [2023-09-01 13:14:01,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 206.0) internal successors, (8240), 40 states have internal predecessors, (8240), 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) [2023-09-01 13:14:01,889 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 206.0) internal successors, (8240), 40 states have internal predecessors, (8240), 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) [2023-09-01 13:14:01,889 INFO L175 Difference]: Start difference. First operand has 1019 places, 2509 transitions, 85336 flow. Second operand 39 states and 2825 transitions. [2023-09-01 13:14:01,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1057 places, 2670 transitions, 96612 flow [2023-09-01 13:14:23,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1030 places, 2670 transitions, 92614 flow, removed 1905 selfloop flow, removed 27 redundant places. [2023-09-01 13:14:23,100 INFO L231 Difference]: Finished difference. Result has 1041 places, 2583 transitions, 86793 flow [2023-09-01 13:14:23,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=81338, PETRI_DIFFERENCE_MINUEND_PLACES=992, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=86793, PETRI_PLACES=1041, PETRI_TRANSITIONS=2583} [2023-09-01 13:14:23,103 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1020 predicate places. [2023-09-01 13:14:23,103 INFO L495 AbstractCegarLoop]: Abstraction has has 1041 places, 2583 transitions, 86793 flow [2023-09-01 13:14:23,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 69.57894736842105) internal successors, (2644), 38 states have internal predecessors, (2644), 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) [2023-09-01 13:14:23,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:14:23,104 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:14:23,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-09-01 13:14:23,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-09-01 13:14:23,310 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:14:23,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:14:23,310 INFO L85 PathProgramCache]: Analyzing trace with hash 729362885, now seen corresponding path program 64 times [2023-09-01 13:14:23,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:14:23,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751554702] [2023-09-01 13:14:23,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:14:23,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:14:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:14:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:14:23,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:14:23,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751554702] [2023-09-01 13:14:23,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751554702] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:14:23,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835790185] [2023-09-01 13:14:23,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:14:23,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:14:23,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:14:23,991 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:14:23,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-09-01 13:14:24,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:14:24,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:14:24,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-09-01 13:14:24,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:14:24,498 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:14:24,498 INFO L350 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 15 treesize of output 14 [2023-09-01 13:14:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:14:24,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:14:25,081 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:14:25,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 110 [2023-09-01 13:14:25,384 INFO L321 Elim1Store]: treesize reduction 44, result has 55.6 percent of original size [2023-09-01 13:14:25,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 65 [2023-09-01 13:14:25,705 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:14:25,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835790185] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:14:25,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:14:25,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2023-09-01 13:14:25,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56508874] [2023-09-01 13:14:25,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:14:25,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-09-01 13:14:25,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:14:25,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-09-01 13:14:25,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1460, Unknown=0, NotChecked=0, Total=1640 [2023-09-01 13:14:28,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 206 [2023-09-01 13:14:28,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1041 places, 2583 transitions, 86793 flow. Second operand has 41 states, 41 states have (on average 75.41463414634147) internal successors, (3092), 41 states have internal predecessors, (3092), 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) [2023-09-01 13:14:28,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:14:28,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 206 [2023-09-01 13:14:28,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:14:44,451 INFO L130 PetriNetUnfolder]: 6282/11948 cut-off events. [2023-09-01 13:14:44,451 INFO L131 PetriNetUnfolder]: For 2016949/2016949 co-relation queries the response was YES. [2023-09-01 13:14:44,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217679 conditions, 11948 events. 6282/11948 cut-off events. For 2016949/2016949 co-relation queries the response was YES. Maximal size of possible extension queue 986. Compared 101566 event pairs, 894 based on Foata normal form. 4/11952 useless extension candidates. Maximal degree in co-relation 217337. Up to 11184 conditions per place. [2023-09-01 13:14:44,687 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 2283 selfloop transitions, 424 changer transitions 6/2713 dead transitions. [2023-09-01 13:14:44,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1090 places, 2713 transitions, 96350 flow [2023-09-01 13:14:44,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-09-01 13:14:44,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-09-01 13:14:44,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3895 transitions. [2023-09-01 13:14:44,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3781553398058252 [2023-09-01 13:14:44,690 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3895 transitions. [2023-09-01 13:14:44,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3895 transitions. [2023-09-01 13:14:44,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:14:44,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3895 transitions. [2023-09-01 13:14:44,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 77.9) internal successors, (3895), 50 states have internal predecessors, (3895), 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) [2023-09-01 13:14:44,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 206.0) internal successors, (10506), 51 states have internal predecessors, (10506), 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) [2023-09-01 13:14:44,697 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 206.0) internal successors, (10506), 51 states have internal predecessors, (10506), 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) [2023-09-01 13:14:44,697 INFO L175 Difference]: Start difference. First operand has 1041 places, 2583 transitions, 86793 flow. Second operand 50 states and 3895 transitions. [2023-09-01 13:14:44,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1090 places, 2713 transitions, 96350 flow [2023-09-01 13:15:04,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1066 places, 2713 transitions, 93805 flow, removed 1135 selfloop flow, removed 24 redundant places. [2023-09-01 13:15:04,235 INFO L231 Difference]: Finished difference. Result has 1072 places, 2627 transitions, 87784 flow [2023-09-01 13:15:04,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=84248, PETRI_DIFFERENCE_MINUEND_PLACES=1017, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=386, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=87784, PETRI_PLACES=1072, PETRI_TRANSITIONS=2627} [2023-09-01 13:15:04,237 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1051 predicate places. [2023-09-01 13:15:04,237 INFO L495 AbstractCegarLoop]: Abstraction has has 1072 places, 2627 transitions, 87784 flow [2023-09-01 13:15:04,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 75.41463414634147) internal successors, (3092), 41 states have internal predecessors, (3092), 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) [2023-09-01 13:15:04,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:15:04,238 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:15:04,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-09-01 13:15:04,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-09-01 13:15:04,444 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:15:04,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:15:04,444 INFO L85 PathProgramCache]: Analyzing trace with hash 2016469053, now seen corresponding path program 65 times [2023-09-01 13:15:04,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:15:04,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656629485] [2023-09-01 13:15:04,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:15:04,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:15:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:15:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:15:05,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:15:05,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656629485] [2023-09-01 13:15:05,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656629485] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:15:05,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141652512] [2023-09-01 13:15:05,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:15:05,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:15:05,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:15:05,151 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:15:05,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-09-01 13:15:05,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 13:15:05,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:15:05,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-09-01 13:15:05,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:15:05,563 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:15:05,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:15:05,744 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:15:05,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-09-01 13:15:05,900 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-09-01 13:15:05,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-09-01 13:15:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 13:15:05,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141652512] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:15:05,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:15:05,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-09-01 13:15:05,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118251630] [2023-09-01 13:15:05,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:15:05,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 13:15:05,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:15:05,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 13:15:05,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2023-09-01 13:15:07,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 206 [2023-09-01 13:15:07,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1072 places, 2627 transitions, 87784 flow. Second operand has 35 states, 35 states have (on average 70.6) internal successors, (2471), 35 states have internal predecessors, (2471), 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) [2023-09-01 13:15:07,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:15:07,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 206 [2023-09-01 13:15:07,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:15:21,985 INFO L130 PetriNetUnfolder]: 6441/12273 cut-off events. [2023-09-01 13:15:21,985 INFO L131 PetriNetUnfolder]: For 2148635/2148635 co-relation queries the response was YES. [2023-09-01 13:15:22,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226802 conditions, 12273 events. 6441/12273 cut-off events. For 2148635/2148635 co-relation queries the response was YES. Maximal size of possible extension queue 982. Compared 105372 event pairs, 961 based on Foata normal form. 6/12279 useless extension candidates. Maximal degree in co-relation 226454. Up to 11540 conditions per place. [2023-09-01 13:15:22,233 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 2485 selfloop transitions, 262 changer transitions 3/2750 dead transitions. [2023-09-01 13:15:22,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1102 places, 2750 transitions, 100102 flow [2023-09-01 13:15:22,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-09-01 13:15:22,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-09-01 13:15:22,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2293 transitions. [2023-09-01 13:15:22,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35906670842467897 [2023-09-01 13:15:22,235 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2293 transitions. [2023-09-01 13:15:22,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2293 transitions. [2023-09-01 13:15:22,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:15:22,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2293 transitions. [2023-09-01 13:15:22,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 73.96774193548387) internal successors, (2293), 31 states have internal predecessors, (2293), 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) [2023-09-01 13:15:22,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 206.0) internal successors, (6592), 32 states have internal predecessors, (6592), 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) [2023-09-01 13:15:22,240 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 206.0) internal successors, (6592), 32 states have internal predecessors, (6592), 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) [2023-09-01 13:15:22,240 INFO L175 Difference]: Start difference. First operand has 1072 places, 2627 transitions, 87784 flow. Second operand 31 states and 2293 transitions. [2023-09-01 13:15:22,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1102 places, 2750 transitions, 100102 flow [2023-09-01 13:15:44,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1070 places, 2750 transitions, 99521 flow, removed 201 selfloop flow, removed 32 redundant places. [2023-09-01 13:15:44,600 INFO L231 Difference]: Finished difference. Result has 1078 places, 2670 transitions, 92136 flow [2023-09-01 13:15:44,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=87203, PETRI_DIFFERENCE_MINUEND_PLACES=1040, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=92136, PETRI_PLACES=1078, PETRI_TRANSITIONS=2670} [2023-09-01 13:15:44,602 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1057 predicate places. [2023-09-01 13:15:44,602 INFO L495 AbstractCegarLoop]: Abstraction has has 1078 places, 2670 transitions, 92136 flow [2023-09-01 13:15:44,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 70.6) internal successors, (2471), 35 states have internal predecessors, (2471), 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) [2023-09-01 13:15:44,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:15:44,603 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:15:44,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-09-01 13:15:44,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-09-01 13:15:44,809 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:15:44,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:15:44,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1542377303, now seen corresponding path program 66 times [2023-09-01 13:15:44,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:15:44,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449339163] [2023-09-01 13:15:44,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:15:44,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:15:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:15:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:15:45,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:15:45,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449339163] [2023-09-01 13:15:45,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449339163] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:15:45,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635482450] [2023-09-01 13:15:45,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:15:45,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:15:45,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:15:45,540 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:15:45,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-09-01 13:15:45,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 13:15:45,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:15:45,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 110 conjunts are in the unsatisfiable core [2023-09-01 13:15:45,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:15:46,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:15:46,061 INFO L350 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 17 treesize of output 14 [2023-09-01 13:15:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:15:46,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:15:46,469 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:15:46,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-09-01 13:15:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:15:46,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635482450] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:15:46,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:15:46,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 10] total 36 [2023-09-01 13:15:46,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291658713] [2023-09-01 13:15:46,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:15:46,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-09-01 13:15:46,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:15:46,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-09-01 13:15:46,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2023-09-01 13:15:48,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 206 [2023-09-01 13:15:48,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1078 places, 2670 transitions, 92136 flow. Second operand has 38 states, 38 states have (on average 69.57894736842105) internal successors, (2644), 38 states have internal predecessors, (2644), 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) [2023-09-01 13:15:48,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:15:48,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 206 [2023-09-01 13:15:48,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:16:05,413 INFO L130 PetriNetUnfolder]: 6506/12400 cut-off events. [2023-09-01 13:16:05,413 INFO L131 PetriNetUnfolder]: For 2206619/2206619 co-relation queries the response was YES. [2023-09-01 13:16:05,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230928 conditions, 12400 events. 6506/12400 cut-off events. For 2206619/2206619 co-relation queries the response was YES. Maximal size of possible extension queue 1027. Compared 106212 event pairs, 953 based on Foata normal form. 2/12402 useless extension candidates. Maximal degree in co-relation 230572. Up to 11400 conditions per place. [2023-09-01 13:16:05,685 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 2235 selfloop transitions, 529 changer transitions 3/2767 dead transitions. [2023-09-01 13:16:05,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1118 places, 2767 transitions, 101256 flow [2023-09-01 13:16:05,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-09-01 13:16:05,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-09-01 13:16:05,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2944 transitions. [2023-09-01 13:16:05,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3485673691688373 [2023-09-01 13:16:05,687 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2944 transitions. [2023-09-01 13:16:05,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2944 transitions. [2023-09-01 13:16:05,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:16:05,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2944 transitions. [2023-09-01 13:16:05,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 71.8048780487805) internal successors, (2944), 41 states have internal predecessors, (2944), 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) [2023-09-01 13:16:05,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 206.0) internal successors, (8652), 42 states have internal predecessors, (8652), 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) [2023-09-01 13:16:05,693 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 206.0) internal successors, (8652), 42 states have internal predecessors, (8652), 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) [2023-09-01 13:16:05,693 INFO L175 Difference]: Start difference. First operand has 1078 places, 2670 transitions, 92136 flow. Second operand 41 states and 2944 transitions. [2023-09-01 13:16:05,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1118 places, 2767 transitions, 101256 flow [2023-09-01 13:16:28,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1101 places, 2767 transitions, 98613 flow, removed 1232 selfloop flow, removed 17 redundant places. [2023-09-01 13:16:28,984 INFO L231 Difference]: Finished difference. Result has 1107 places, 2703 transitions, 93166 flow [2023-09-01 13:16:28,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=89495, PETRI_DIFFERENCE_MINUEND_PLACES=1061, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=501, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=93166, PETRI_PLACES=1107, PETRI_TRANSITIONS=2703} [2023-09-01 13:16:28,987 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1086 predicate places. [2023-09-01 13:16:28,987 INFO L495 AbstractCegarLoop]: Abstraction has has 1107 places, 2703 transitions, 93166 flow [2023-09-01 13:16:28,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 69.57894736842105) internal successors, (2644), 38 states have internal predecessors, (2644), 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) [2023-09-01 13:16:28,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:16:28,988 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:16:28,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-09-01 13:16:29,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2023-09-01 13:16:29,194 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:16:29,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:16:29,194 INFO L85 PathProgramCache]: Analyzing trace with hash 192793413, now seen corresponding path program 67 times [2023-09-01 13:16:29,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:16:29,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430657635] [2023-09-01 13:16:29,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:16:29,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:16:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:16:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:16:29,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:16:29,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430657635] [2023-09-01 13:16:29,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430657635] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:16:29,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787255957] [2023-09-01 13:16:29,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:16:29,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:16:29,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:16:29,907 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:16:29,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-09-01 13:16:30,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:16:30,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-09-01 13:16:30,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:16:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:16:30,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:16:30,544 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:16:30,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-09-01 13:16:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 13:16:30,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787255957] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:16:30,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:16:30,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-09-01 13:16:30,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901849422] [2023-09-01 13:16:30,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:16:30,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 13:16:30,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:16:30,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 13:16:30,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2023-09-01 13:16:32,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 206 [2023-09-01 13:16:32,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1107 places, 2703 transitions, 93166 flow. Second operand has 35 states, 35 states have (on average 70.6) internal successors, (2471), 35 states have internal predecessors, (2471), 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) [2023-09-01 13:16:32,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:16:32,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 206 [2023-09-01 13:16:32,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:16:46,165 INFO L130 PetriNetUnfolder]: 6618/12621 cut-off events. [2023-09-01 13:16:46,166 INFO L131 PetriNetUnfolder]: For 2337778/2337778 co-relation queries the response was YES. [2023-09-01 13:16:46,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237740 conditions, 12621 events. 6618/12621 cut-off events. For 2337778/2337778 co-relation queries the response was YES. Maximal size of possible extension queue 1037. Compared 108471 event pairs, 1044 based on Foata normal form. 6/12627 useless extension candidates. Maximal degree in co-relation 237378. Up to 12168 conditions per place. [2023-09-01 13:16:46,419 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 2582 selfloop transitions, 202 changer transitions 2/2786 dead transitions. [2023-09-01 13:16:46,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1133 places, 2786 transitions, 102851 flow [2023-09-01 13:16:46,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 13:16:46,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 13:16:46,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1984 transitions. [2023-09-01 13:16:46,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3567062207838907 [2023-09-01 13:16:46,421 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1984 transitions. [2023-09-01 13:16:46,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1984 transitions. [2023-09-01 13:16:46,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:16:46,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1984 transitions. [2023-09-01 13:16:46,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 73.48148148148148) internal successors, (1984), 27 states have internal predecessors, (1984), 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) [2023-09-01 13:16:46,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 206.0) internal successors, (5768), 28 states have internal predecessors, (5768), 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) [2023-09-01 13:16:46,425 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 206.0) internal successors, (5768), 28 states have internal predecessors, (5768), 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) [2023-09-01 13:16:46,425 INFO L175 Difference]: Start difference. First operand has 1107 places, 2703 transitions, 93166 flow. Second operand 27 states and 1984 transitions. [2023-09-01 13:16:46,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1133 places, 2786 transitions, 102851 flow Killed by 15