./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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/mult-comm.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 a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 19:25:04,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 19:25:04,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 19:25:04,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 19:25:04,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 19:25:04,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 19:25:04,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 19:25:04,730 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 19:25:04,732 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 19:25:04,736 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 19:25:04,737 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 19:25:04,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 19:25:04,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 19:25:04,741 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 19:25:04,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 19:25:04,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 19:25:04,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 19:25:04,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 19:25:04,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 19:25:04,756 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 19:25:04,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 19:25:04,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 19:25:04,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 19:25:04,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 19:25:04,766 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 19:25:04,766 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 19:25:04,766 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 19:25:04,768 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 19:25:04,768 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 19:25:04,769 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 19:25:04,769 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 19:25:04,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 19:25:04,772 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 19:25:04,772 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 19:25:04,773 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 19:25:04,773 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 19:25:04,774 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 19:25:04,774 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 19:25:04,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 19:25:04,775 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 19:25:04,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 19:25:04,781 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 19:25:04,815 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 19:25:04,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 19:25:04,816 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 19:25:04,817 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 19:25:04,817 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 19:25:04,817 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 19:25:04,818 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 19:25:04,818 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 19:25:04,818 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 19:25:04,819 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 19:25:04,819 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 19:25:04,819 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 19:25:04,820 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 19:25:04,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 19:25:04,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 19:25:04,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 19:25:04,820 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 19:25:04,821 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 19:25:04,821 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 19:25:04,821 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 19:25:04,821 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 19:25:04,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 19:25:04,821 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 19:25:04,822 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 19:25:04,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:25:04,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 19:25:04,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 19:25:04,823 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 19:25:04,823 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 19:25:04,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 19:25:04,823 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 19:25:04,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 19:25:04,824 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 19:25:04,824 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 19:25:04,824 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 19:25:04,824 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 19:25:05,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 19:25:05,117 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 19:25:05,119 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 19:25:05,120 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 19:25:05,121 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 19:25:05,122 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c [2023-08-30 19:25:06,182 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 19:25:06,360 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 19:25:06,361 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c [2023-08-30 19:25:06,367 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a41ed7a12/baaa4f5391a94497963fe4fdce70582c/FLAGbc6adf53f [2023-08-30 19:25:06,385 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a41ed7a12/baaa4f5391a94497963fe4fdce70582c [2023-08-30 19:25:06,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 19:25:06,389 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 19:25:06,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 19:25:06,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 19:25:06,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 19:25:06,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:25:06" (1/1) ... [2023-08-30 19:25:06,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@506d78cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:06, skipping insertion in model container [2023-08-30 19:25:06,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:25:06" (1/1) ... [2023-08-30 19:25:06,402 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 19:25:06,418 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 19:25:06,576 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/mult-comm.wvr.c[1910,1923] [2023-08-30 19:25:06,580 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:25:06,589 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 19:25:06,611 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/mult-comm.wvr.c[1910,1923] [2023-08-30 19:25:06,616 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:25:06,627 INFO L208 MainTranslator]: Completed translation [2023-08-30 19:25:06,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:06 WrapperNode [2023-08-30 19:25:06,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 19:25:06,629 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 19:25:06,629 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 19:25:06,629 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 19:25:06,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:06" (1/1) ... [2023-08-30 19:25:06,644 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:06" (1/1) ... [2023-08-30 19:25:06,662 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2023-08-30 19:25:06,662 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 19:25:06,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 19:25:06,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 19:25:06,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 19:25:06,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:06" (1/1) ... [2023-08-30 19:25:06,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:06" (1/1) ... [2023-08-30 19:25:06,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:06" (1/1) ... [2023-08-30 19:25:06,682 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:06" (1/1) ... [2023-08-30 19:25:06,701 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:06" (1/1) ... [2023-08-30 19:25:06,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:06" (1/1) ... [2023-08-30 19:25:06,704 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:06" (1/1) ... [2023-08-30 19:25:06,705 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:06" (1/1) ... [2023-08-30 19:25:06,706 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 19:25:06,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 19:25:06,707 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 19:25:06,707 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 19:25:06,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:06" (1/1) ... [2023-08-30 19:25:06,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:25:06,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:25:06,742 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) [2023-08-30 19:25:06,760 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 [2023-08-30 19:25:06,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 19:25:06,781 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 19:25:06,781 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 19:25:06,782 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 19:25:06,782 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 19:25:06,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 19:25:06,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 19:25:06,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 19:25:06,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 19:25:06,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 19:25:06,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 19:25:06,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 19:25:06,788 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 19:25:06,865 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 19:25:06,867 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 19:25:07,024 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 19:25:07,029 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 19:25:07,029 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 19:25:07,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:25:07 BoogieIcfgContainer [2023-08-30 19:25:07,046 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 19:25:07,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 19:25:07,048 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 19:25:07,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 19:25:07,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:25:06" (1/3) ... [2023-08-30 19:25:07,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@212d339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:25:07, skipping insertion in model container [2023-08-30 19:25:07,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:25:06" (2/3) ... [2023-08-30 19:25:07,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@212d339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:25:07, skipping insertion in model container [2023-08-30 19:25:07,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:25:07" (3/3) ... [2023-08-30 19:25:07,052 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2023-08-30 19:25:07,058 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 19:25:07,094 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 19:25:07,095 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 19:25:07,095 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 19:25:07,183 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 19:25:07,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 77 transitions, 170 flow [2023-08-30 19:25:07,287 INFO L130 PetriNetUnfolder]: 5/75 cut-off events. [2023-08-30 19:25:07,288 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 19:25:07,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 75 events. 5/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2023-08-30 19:25:07,293 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 77 transitions, 170 flow [2023-08-30 19:25:07,298 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 67 transitions, 146 flow [2023-08-30 19:25:07,302 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 19:25:07,314 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 67 transitions, 146 flow [2023-08-30 19:25:07,317 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 67 transitions, 146 flow [2023-08-30 19:25:07,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 67 transitions, 146 flow [2023-08-30 19:25:07,355 INFO L130 PetriNetUnfolder]: 5/67 cut-off events. [2023-08-30 19:25:07,357 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 19:25:07,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 67 events. 5/67 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2023-08-30 19:25:07,359 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-08-30 19:25:09,155 INFO L134 LiptonReduction]: Checked pairs total: 509 [2023-08-30 19:25:09,156 INFO L136 LiptonReduction]: Total number of compositions: 59 [2023-08-30 19:25:09,167 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 19:25:09,172 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;@2681991a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 19:25:09,172 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 19:25:09,176 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-08-30 19:25:09,176 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 19:25:09,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:25:09,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:25:09,177 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:25:09,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:25:09,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1543000620, now seen corresponding path program 1 times [2023-08-30 19:25:09,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:25:09,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833490548] [2023-08-30 19:25:09,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:25:09,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:25:09,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:25:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:09,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:25:09,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833490548] [2023-08-30 19:25:09,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833490548] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:25:09,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:25:09,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 19:25:09,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036334900] [2023-08-30 19:25:09,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:25:09,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 19:25:09,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:25:09,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 19:25:09,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 19:25:09,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 136 [2023-08-30 19:25:09,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:09,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:25:09,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 136 [2023-08-30 19:25:09,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:25:09,791 INFO L130 PetriNetUnfolder]: 65/114 cut-off events. [2023-08-30 19:25:09,792 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 19:25:09,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 114 events. 65/114 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 325 event pairs, 9 based on Foata normal form. 1/74 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-08-30 19:25:09,795 INFO L137 encePairwiseOnDemand]: 132/136 looper letters, 19 selfloop transitions, 3 changer transitions 1/25 dead transitions. [2023-08-30 19:25:09,796 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 117 flow [2023-08-30 19:25:09,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 19:25:09,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 19:25:09,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2023-08-30 19:25:09,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5514705882352942 [2023-08-30 19:25:09,809 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2023-08-30 19:25:09,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2023-08-30 19:25:09,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:25:09,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2023-08-30 19:25:09,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:09,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:09,825 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:09,826 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 225 transitions. [2023-08-30 19:25:09,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 117 flow [2023-08-30 19:25:09,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 25 transitions, 103 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 19:25:09,831 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 53 flow [2023-08-30 19:25:09,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2023-08-30 19:25:09,836 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-08-30 19:25:09,836 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 53 flow [2023-08-30 19:25:09,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:09,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:25:09,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:25:09,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 19:25:09,838 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:25:09,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:25:09,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1815553743, now seen corresponding path program 1 times [2023-08-30 19:25:09,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:25:09,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084319313] [2023-08-30 19:25:09,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:25:09,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:25:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:25:10,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:10,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:25:10,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084319313] [2023-08-30 19:25:10,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084319313] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:25:10,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952049933] [2023-08-30 19:25:10,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:25:10,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:25:10,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:25:10,101 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) [2023-08-30 19:25:10,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 19:25:10,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:25:10,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 19:25:10,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:25:10,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:10,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:25:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:10,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952049933] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:25:10,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:25:10,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2023-08-30 19:25:10,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611158469] [2023-08-30 19:25:10,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:25:10,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 19:25:10,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:25:10,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 19:25:10,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-08-30 19:25:10,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 136 [2023-08-30 19:25:10,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 53 flow. Second operand has 9 states, 9 states have (on average 61.888888888888886) internal successors, (557), 9 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:10,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:25:10,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 136 [2023-08-30 19:25:10,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:25:12,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 19:25:13,042 INFO L130 PetriNetUnfolder]: 81/152 cut-off events. [2023-08-30 19:25:13,042 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-08-30 19:25:13,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 152 events. 81/152 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 496 event pairs, 1 based on Foata normal form. 2/152 useless extension candidates. Maximal degree in co-relation 89. Up to 83 conditions per place. [2023-08-30 19:25:13,044 INFO L137 encePairwiseOnDemand]: 130/136 looper letters, 32 selfloop transitions, 9 changer transitions 6/48 dead transitions. [2023-08-30 19:25:13,044 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 48 transitions, 228 flow [2023-08-30 19:25:13,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:25:13,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:25:13,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 462 transitions. [2023-08-30 19:25:13,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4852941176470588 [2023-08-30 19:25:13,047 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 462 transitions. [2023-08-30 19:25:13,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 462 transitions. [2023-08-30 19:25:13,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:25:13,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 462 transitions. [2023-08-30 19:25:13,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.0) internal successors, (462), 7 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:13,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 136.0) internal successors, (1088), 8 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:13,052 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 136.0) internal successors, (1088), 8 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:13,052 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 53 flow. Second operand 7 states and 462 transitions. [2023-08-30 19:25:13,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 48 transitions, 228 flow [2023-08-30 19:25:13,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 48 transitions, 223 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 19:25:13,053 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 109 flow [2023-08-30 19:25:13,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=109, PETRI_PLACES=28, PETRI_TRANSITIONS=23} [2023-08-30 19:25:13,054 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 8 predicate places. [2023-08-30 19:25:13,054 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 109 flow [2023-08-30 19:25:13,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 61.888888888888886) internal successors, (557), 9 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:13,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:25:13,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:25:13,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 19:25:13,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:25:13,265 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:25:13,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:25:13,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1901148465, now seen corresponding path program 1 times [2023-08-30 19:25:13,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:25:13,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072427160] [2023-08-30 19:25:13,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:25:13,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:25:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:25:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:13,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:25:13,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072427160] [2023-08-30 19:25:13,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072427160] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:25:13,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136295863] [2023-08-30 19:25:13,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:25:13,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:25:13,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:25:13,436 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) [2023-08-30 19:25:13,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 19:25:13,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:25:13,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 19:25:13,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:25:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:13,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:25:13,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:13,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136295863] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:25:13,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:25:13,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2023-08-30 19:25:13,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583949630] [2023-08-30 19:25:13,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:25:13,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 19:25:13,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:25:14,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 19:25:14,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-08-30 19:25:16,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 19:25:16,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 136 [2023-08-30 19:25:16,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 109 flow. Second operand has 9 states, 9 states have (on average 61.888888888888886) internal successors, (557), 9 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:16,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:25:16,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 136 [2023-08-30 19:25:16,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:25:16,924 INFO L130 PetriNetUnfolder]: 77/155 cut-off events. [2023-08-30 19:25:16,925 INFO L131 PetriNetUnfolder]: For 75/81 co-relation queries the response was YES. [2023-08-30 19:25:16,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 155 events. 77/155 cut-off events. For 75/81 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 508 event pairs, 11 based on Foata normal form. 7/160 useless extension candidates. Maximal degree in co-relation 401. Up to 103 conditions per place. [2023-08-30 19:25:16,927 INFO L137 encePairwiseOnDemand]: 130/136 looper letters, 25 selfloop transitions, 7 changer transitions 13/47 dead transitions. [2023-08-30 19:25:16,927 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 47 transitions, 274 flow [2023-08-30 19:25:16,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 19:25:16,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 19:25:16,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 396 transitions. [2023-08-30 19:25:16,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4852941176470588 [2023-08-30 19:25:16,930 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 396 transitions. [2023-08-30 19:25:16,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 396 transitions. [2023-08-30 19:25:16,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:25:16,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 396 transitions. [2023-08-30 19:25:16,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:16,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:16,935 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:16,935 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 109 flow. Second operand 6 states and 396 transitions. [2023-08-30 19:25:16,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 47 transitions, 274 flow [2023-08-30 19:25:16,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 47 transitions, 257 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-30 19:25:16,938 INFO L231 Difference]: Finished difference. Result has 35 places, 25 transitions, 132 flow [2023-08-30 19:25:16,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=132, PETRI_PLACES=35, PETRI_TRANSITIONS=25} [2023-08-30 19:25:16,939 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 15 predicate places. [2023-08-30 19:25:16,939 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 25 transitions, 132 flow [2023-08-30 19:25:16,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 61.888888888888886) internal successors, (557), 9 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:16,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:25:16,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:25:16,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 19:25:17,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-30 19:25:17,149 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:25:17,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:25:17,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1541373281, now seen corresponding path program 2 times [2023-08-30 19:25:17,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:25:17,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911675892] [2023-08-30 19:25:17,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:25:17,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:25:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:25:17,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:17,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:25:17,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911675892] [2023-08-30 19:25:17,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911675892] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:25:17,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826576925] [2023-08-30 19:25:17,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:25:17,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:25:17,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:25:17,365 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) [2023-08-30 19:25:17,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 19:25:17,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:25:17,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:25:17,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 19:25:17,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:25:17,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:17,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:25:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:17,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826576925] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:25:17,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:25:17,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 12 [2023-08-30 19:25:17,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407901111] [2023-08-30 19:25:17,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:25:17,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 19:25:17,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:25:17,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 19:25:17,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-08-30 19:25:17,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-08-30 19:25:17,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 25 transitions, 132 flow. Second operand has 14 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:17,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:25:17,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-08-30 19:25:17,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:25:18,213 INFO L130 PetriNetUnfolder]: 137/263 cut-off events. [2023-08-30 19:25:18,213 INFO L131 PetriNetUnfolder]: For 181/181 co-relation queries the response was YES. [2023-08-30 19:25:18,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 826 conditions, 263 events. 137/263 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 977 event pairs, 9 based on Foata normal form. 3/266 useless extension candidates. Maximal degree in co-relation 802. Up to 126 conditions per place. [2023-08-30 19:25:18,216 INFO L137 encePairwiseOnDemand]: 129/136 looper letters, 46 selfloop transitions, 20 changer transitions 12/78 dead transitions. [2023-08-30 19:25:18,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 78 transitions, 464 flow [2023-08-30 19:25:18,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 19:25:18,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 19:25:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 671 transitions. [2023-08-30 19:25:18,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485294117647059 [2023-08-30 19:25:18,219 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 671 transitions. [2023-08-30 19:25:18,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 671 transitions. [2023-08-30 19:25:18,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:25:18,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 671 transitions. [2023-08-30 19:25:18,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 61.0) internal successors, (671), 11 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:18,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 136.0) internal successors, (1632), 12 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) [2023-08-30 19:25:18,223 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 136.0) internal successors, (1632), 12 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) [2023-08-30 19:25:18,223 INFO L175 Difference]: Start difference. First operand has 35 places, 25 transitions, 132 flow. Second operand 11 states and 671 transitions. [2023-08-30 19:25:18,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 78 transitions, 464 flow [2023-08-30 19:25:18,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 78 transitions, 444 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-30 19:25:18,227 INFO L231 Difference]: Finished difference. Result has 46 places, 37 transitions, 239 flow [2023-08-30 19:25:18,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=239, PETRI_PLACES=46, PETRI_TRANSITIONS=37} [2023-08-30 19:25:18,228 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 26 predicate places. [2023-08-30 19:25:18,228 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 37 transitions, 239 flow [2023-08-30 19:25:18,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:18,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:25:18,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:25:18,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 19:25:18,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:25:18,435 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:25:18,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:25:18,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1519035833, now seen corresponding path program 3 times [2023-08-30 19:25:18,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:25:18,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799831112] [2023-08-30 19:25:18,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:25:18,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:25:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:25:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:18,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:25:18,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799831112] [2023-08-30 19:25:18,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799831112] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:25:18,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135510833] [2023-08-30 19:25:18,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:25:18,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:25:18,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:25:18,613 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) [2023-08-30 19:25:18,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 19:25:18,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:25:18,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:25:18,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 19:25:18,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:25:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:18,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:25:19,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:19,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135510833] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:25:19,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:25:19,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 11 [2023-08-30 19:25:19,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004906689] [2023-08-30 19:25:19,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:25:19,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 19:25:19,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:25:19,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 19:25:19,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2023-08-30 19:25:19,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-08-30 19:25:19,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 37 transitions, 239 flow. Second operand has 13 states, 13 states have (on average 56.46153846153846) internal successors, (734), 13 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:19,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:25:19,290 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-08-30 19:25:19,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:25:19,745 INFO L130 PetriNetUnfolder]: 165/324 cut-off events. [2023-08-30 19:25:19,745 INFO L131 PetriNetUnfolder]: For 533/533 co-relation queries the response was YES. [2023-08-30 19:25:19,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1199 conditions, 324 events. 165/324 cut-off events. For 533/533 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1293 event pairs, 26 based on Foata normal form. 3/323 useless extension candidates. Maximal degree in co-relation 1133. Up to 218 conditions per place. [2023-08-30 19:25:19,748 INFO L137 encePairwiseOnDemand]: 129/136 looper letters, 55 selfloop transitions, 20 changer transitions 12/87 dead transitions. [2023-08-30 19:25:19,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 87 transitions, 614 flow [2023-08-30 19:25:19,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:25:19,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:25:19,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 614 transitions. [2023-08-30 19:25:19,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4514705882352941 [2023-08-30 19:25:19,751 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 614 transitions. [2023-08-30 19:25:19,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 614 transitions. [2023-08-30 19:25:19,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:25:19,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 614 transitions. [2023-08-30 19:25:19,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 61.4) internal successors, (614), 10 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:19,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:19,755 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:19,755 INFO L175 Difference]: Start difference. First operand has 46 places, 37 transitions, 239 flow. Second operand 10 states and 614 transitions. [2023-08-30 19:25:19,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 87 transitions, 614 flow [2023-08-30 19:25:19,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 87 transitions, 536 flow, removed 26 selfloop flow, removed 5 redundant places. [2023-08-30 19:25:19,760 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 320 flow [2023-08-30 19:25:19,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=320, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2023-08-30 19:25:19,761 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 35 predicate places. [2023-08-30 19:25:19,761 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 320 flow [2023-08-30 19:25:19,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.46153846153846) internal successors, (734), 13 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:19,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:25:19,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:25:19,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 19:25:19,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:25:19,968 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:25:19,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:25:19,968 INFO L85 PathProgramCache]: Analyzing trace with hash -2058058253, now seen corresponding path program 2 times [2023-08-30 19:25:19,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:25:19,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839829889] [2023-08-30 19:25:19,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:25:19,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:25:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:25:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:20,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:25:20,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839829889] [2023-08-30 19:25:20,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839829889] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:25:20,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131678093] [2023-08-30 19:25:20,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:25:20,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:25:20,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:25:20,167 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) [2023-08-30 19:25:20,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 19:25:20,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:25:20,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:25:20,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 19:25:20,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:25:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:20,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:25:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:20,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131678093] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:25:20,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:25:20,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-08-30 19:25:20,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837572459] [2023-08-30 19:25:20,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:25:20,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 19:25:20,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:25:20,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 19:25:20,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-08-30 19:25:20,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 136 [2023-08-30 19:25:20,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 320 flow. Second operand has 10 states, 10 states have (on average 61.8) internal successors, (618), 10 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:20,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:25:20,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 136 [2023-08-30 19:25:20,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:25:20,954 INFO L130 PetriNetUnfolder]: 190/381 cut-off events. [2023-08-30 19:25:20,954 INFO L131 PetriNetUnfolder]: For 883/897 co-relation queries the response was YES. [2023-08-30 19:25:20,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1443 conditions, 381 events. 190/381 cut-off events. For 883/897 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1680 event pairs, 22 based on Foata normal form. 9/376 useless extension candidates. Maximal degree in co-relation 1362. Up to 237 conditions per place. [2023-08-30 19:25:20,957 INFO L137 encePairwiseOnDemand]: 130/136 looper letters, 60 selfloop transitions, 22 changer transitions 7/92 dead transitions. [2023-08-30 19:25:20,957 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 92 transitions, 695 flow [2023-08-30 19:25:20,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:25:20,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:25:20,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 596 transitions. [2023-08-30 19:25:20,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4869281045751634 [2023-08-30 19:25:20,959 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 596 transitions. [2023-08-30 19:25:20,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 596 transitions. [2023-08-30 19:25:20,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:25:20,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 596 transitions. [2023-08-30 19:25:20,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 66.22222222222223) internal successors, (596), 9 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:20,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 136.0) internal successors, (1360), 10 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:20,963 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 136.0) internal successors, (1360), 10 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:20,964 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 320 flow. Second operand 9 states and 596 transitions. [2023-08-30 19:25:20,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 92 transitions, 695 flow [2023-08-30 19:25:20,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 92 transitions, 640 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-08-30 19:25:20,969 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 397 flow [2023-08-30 19:25:20,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=397, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-08-30 19:25:20,970 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 43 predicate places. [2023-08-30 19:25:20,970 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 397 flow [2023-08-30 19:25:20,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 61.8) internal successors, (618), 10 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:20,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:25:20,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:25:20,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 19:25:21,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:25:21,176 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:25:21,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:25:21,177 INFO L85 PathProgramCache]: Analyzing trace with hash 587325377, now seen corresponding path program 3 times [2023-08-30 19:25:21,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:25:21,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344375202] [2023-08-30 19:25:21,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:25:21,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:25:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:25:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:21,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:25:21,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344375202] [2023-08-30 19:25:21,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344375202] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:25:21,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944416194] [2023-08-30 19:25:21,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:25:21,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:25:21,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:25:21,430 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) [2023-08-30 19:25:21,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 19:25:21,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:25:21,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:25:21,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 19:25:21,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:25:21,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:21,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:25:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:21,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944416194] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:25:21,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:25:21,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2023-08-30 19:25:21,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437541323] [2023-08-30 19:25:21,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:25:21,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 19:25:21,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:25:21,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 19:25:21,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2023-08-30 19:25:21,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 136 [2023-08-30 19:25:21,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 397 flow. Second operand has 11 states, 11 states have (on average 61.72727272727273) internal successors, (679), 11 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:21,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:25:21,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 136 [2023-08-30 19:25:21,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:25:21,914 INFO L130 PetriNetUnfolder]: 234/463 cut-off events. [2023-08-30 19:25:21,914 INFO L131 PetriNetUnfolder]: For 1200/1213 co-relation queries the response was YES. [2023-08-30 19:25:21,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1800 conditions, 463 events. 234/463 cut-off events. For 1200/1213 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2157 event pairs, 46 based on Foata normal form. 9/457 useless extension candidates. Maximal degree in co-relation 1705. Up to 317 conditions per place. [2023-08-30 19:25:21,917 INFO L137 encePairwiseOnDemand]: 130/136 looper letters, 63 selfloop transitions, 25 changer transitions 7/98 dead transitions. [2023-08-30 19:25:21,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 98 transitions, 783 flow [2023-08-30 19:25:21,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:25:21,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:25:21,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 653 transitions. [2023-08-30 19:25:21,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4801470588235294 [2023-08-30 19:25:21,920 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 653 transitions. [2023-08-30 19:25:21,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 653 transitions. [2023-08-30 19:25:21,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:25:21,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 653 transitions. [2023-08-30 19:25:21,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 65.3) internal successors, (653), 10 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:21,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:21,924 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:21,924 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 397 flow. Second operand 10 states and 653 transitions. [2023-08-30 19:25:21,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 98 transitions, 783 flow [2023-08-30 19:25:21,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 98 transitions, 708 flow, removed 27 selfloop flow, removed 3 redundant places. [2023-08-30 19:25:21,930 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 482 flow [2023-08-30 19:25:21,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=482, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2023-08-30 19:25:21,931 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 52 predicate places. [2023-08-30 19:25:21,931 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 482 flow [2023-08-30 19:25:21,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 61.72727272727273) internal successors, (679), 11 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:25:21,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:25:21,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:25:21,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 19:25:22,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:25:22,139 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:25:22,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:25:22,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1884096032, now seen corresponding path program 1 times [2023-08-30 19:25:22,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:25:22,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268993502] [2023-08-30 19:25:22,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:25:22,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:25:22,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:25:22,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:22,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:25:22,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268993502] [2023-08-30 19:25:22,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268993502] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:25:22,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040354946] [2023-08-30 19:25:22,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:25:22,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:25:22,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:25:22,625 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) [2023-08-30 19:25:22,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 19:25:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:25:22,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 19:25:22,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:25:22,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:25:22,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:25:49,409 WARN L222 SmtUtils]: Spent 23.04s on a formula simplification. DAG size of input: 1170 DAG size of output: 1127 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 19:28:03,666 WARN L222 SmtUtils]: Spent 5.73s on a formula simplification. DAG size of input: 689 DAG size of output: 658 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15