./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/parallel-lamport.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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 ../sv-benchmarks/c/weaver/parallel-lamport.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 dda4e60b50ccb96ce521fa11aa956967863397082d82b1fb589f74967fe28a7c --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 03:03:34,721 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 03:03:34,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 03:03:34,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 03:03:34,767 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 03:03:34,767 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 03:03:34,768 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 03:03:34,770 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 03:03:34,771 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 03:03:34,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 03:03:34,774 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 03:03:34,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 03:03:34,777 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 03:03:34,778 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 03:03:34,779 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 03:03:34,780 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 03:03:34,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 03:03:34,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 03:03:34,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 03:03:34,783 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 03:03:34,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 03:03:34,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 03:03:34,789 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 03:03:34,793 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 03:03:34,795 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 03:03:34,795 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 03:03:34,795 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 03:03:34,796 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 03:03:34,796 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 03:03:34,796 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 03:03:34,797 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 03:03:34,797 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 03:03:34,798 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 03:03:34,798 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 03:03:34,799 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 03:03:34,799 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 03:03:34,799 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 03:03:34,800 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 03:03:34,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 03:03:34,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 03:03:34,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 03:03:34,804 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 03:03:34,834 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 03:03:34,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 03:03:34,837 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 03:03:34,837 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 03:03:34,838 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 03:03:34,838 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 03:03:34,838 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 03:03:34,838 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 03:03:34,838 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 03:03:34,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 03:03:34,839 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 03:03:34,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 03:03:34,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 03:03:34,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 03:03:34,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 03:03:34,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 03:03:34,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 03:03:34,840 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 03:03:34,840 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 03:03:34,841 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 03:03:34,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 03:03:34,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 03:03:34,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 03:03:34,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 03:03:34,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:03:34,841 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 03:03:34,842 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 03:03:34,842 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 03:03:34,842 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 03:03:34,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 03:03:34,842 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 03:03:34,842 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 03:03:34,843 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 03:03:34,843 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 03:03:34,843 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda4e60b50ccb96ce521fa11aa956967863397082d82b1fb589f74967fe28a7c [2021-12-16 03:03:35,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 03:03:35,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 03:03:35,049 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 03:03:35,050 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 03:03:35,050 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 03:03:35,051 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-lamport.wvr.c [2021-12-16 03:03:35,098 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/563be4851/13432f466bf14892b0bf9c475303ea9d/FLAG13c30436c [2021-12-16 03:03:35,402 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 03:03:35,403 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-lamport.wvr.c [2021-12-16 03:03:35,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/563be4851/13432f466bf14892b0bf9c475303ea9d/FLAG13c30436c [2021-12-16 03:03:35,845 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/563be4851/13432f466bf14892b0bf9c475303ea9d [2021-12-16 03:03:35,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 03:03:35,848 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 03:03:35,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 03:03:35,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 03:03:35,853 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 03:03:35,853 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:03:35" (1/1) ... [2021-12-16 03:03:35,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36e75b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:03:35, skipping insertion in model container [2021-12-16 03:03:35,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:03:35" (1/1) ... [2021-12-16 03:03:35,858 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 03:03:35,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 03:03:36,016 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-lamport.wvr.c[4210,4223] [2021-12-16 03:03:36,023 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:03:36,034 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 03:03:36,064 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-lamport.wvr.c[4210,4223] [2021-12-16 03:03:36,076 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:03:36,090 INFO L208 MainTranslator]: Completed translation [2021-12-16 03:03:36,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:03:36 WrapperNode [2021-12-16 03:03:36,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 03:03:36,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 03:03:36,091 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 03:03:36,091 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 03:03:36,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:03:36" (1/1) ... [2021-12-16 03:03:36,101 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:03:36" (1/1) ... [2021-12-16 03:03:36,124 INFO L137 Inliner]: procedures = 25, calls = 89, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 235 [2021-12-16 03:03:36,125 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 03:03:36,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 03:03:36,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 03:03:36,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 03:03:36,142 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:03:36" (1/1) ... [2021-12-16 03:03:36,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:03:36" (1/1) ... [2021-12-16 03:03:36,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:03:36" (1/1) ... [2021-12-16 03:03:36,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:03:36" (1/1) ... [2021-12-16 03:03:36,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:03:36" (1/1) ... [2021-12-16 03:03:36,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:03:36" (1/1) ... [2021-12-16 03:03:36,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:03:36" (1/1) ... [2021-12-16 03:03:36,162 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 03:03:36,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 03:03:36,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 03:03:36,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 03:03:36,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:03:36" (1/1) ... [2021-12-16 03:03:36,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:03:36,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:03:36,204 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) [2021-12-16 03:03:36,207 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 [2021-12-16 03:03:36,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 03:03:36,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 03:03:36,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 03:03:36,231 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 03:03:36,231 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-16 03:03:36,231 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-16 03:03:36,231 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-16 03:03:36,231 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-16 03:03:36,231 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-16 03:03:36,231 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-16 03:03:36,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 03:03:36,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-16 03:03:36,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-16 03:03:36,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 03:03:36,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 03:03:36,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 03:03:36,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 03:03:36,233 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-16 03:03:36,308 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 03:03:36,309 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 03:03:36,564 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 03:03:36,610 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 03:03:36,611 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-16 03:03:36,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:03:36 BoogieIcfgContainer [2021-12-16 03:03:36,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 03:03:36,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 03:03:36,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 03:03:36,617 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 03:03:36,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 03:03:35" (1/3) ... [2021-12-16 03:03:36,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6658ef03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:03:36, skipping insertion in model container [2021-12-16 03:03:36,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:03:36" (2/3) ... [2021-12-16 03:03:36,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6658ef03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:03:36, skipping insertion in model container [2021-12-16 03:03:36,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:03:36" (3/3) ... [2021-12-16 03:03:36,620 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-lamport.wvr.c [2021-12-16 03:03:36,633 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-16 03:03:36,633 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 03:03:36,633 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 03:03:36,634 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-16 03:03:36,663 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,664 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,664 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,664 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,664 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,664 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,664 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,664 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,664 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,665 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,665 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,665 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,665 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,665 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,665 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,665 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,665 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,665 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,666 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,666 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,666 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,666 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,666 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,666 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,666 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,666 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,666 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,667 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,667 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,667 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,667 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,667 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,667 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,667 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,667 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,667 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,667 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,668 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,668 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,668 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,668 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,668 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,668 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,668 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,668 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,668 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,668 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,668 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,670 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,671 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,671 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,671 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,671 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,671 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,672 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,672 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,672 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,672 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,672 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,672 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,672 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,672 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,672 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,673 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:36,674 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-12-16 03:03:36,710 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 03:03:36,715 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 03:03:36,715 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-16 03:03:36,724 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 189 places, 186 transitions, 396 flow [2021-12-16 03:03:36,780 INFO L129 PetriNetUnfolder]: 7/183 cut-off events. [2021-12-16 03:03:36,780 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-16 03:03:36,782 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 183 events. 7/183 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 100 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 150. Up to 2 conditions per place. [2021-12-16 03:03:36,782 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 186 transitions, 396 flow [2021-12-16 03:03:36,786 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 172 transitions, 362 flow [2021-12-16 03:03:36,861 INFO L129 PetriNetUnfolder]: 7/171 cut-off events. [2021-12-16 03:03:36,861 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-16 03:03:36,861 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:03:36,862 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:03:36,862 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:03:36,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:03:36,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1585459092, now seen corresponding path program 1 times [2021-12-16 03:03:36,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:03:36,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016974455] [2021-12-16 03:03:36,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:03:36,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:03:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:03:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:03:37,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:03:37,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016974455] [2021-12-16 03:03:37,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016974455] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:03:37,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:03:37,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 03:03:37,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721868787] [2021-12-16 03:03:37,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:03:37,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 03:03:37,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:03:37,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 03:03:37,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 03:03:37,078 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 186 [2021-12-16 03:03:37,081 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 172 transitions, 362 flow. Second operand has 2 states, 2 states have (on average 171.0) internal successors, (342), 2 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:37,081 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:03:37,081 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 186 [2021-12-16 03:03:37,082 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:03:37,214 INFO L129 PetriNetUnfolder]: 215/670 cut-off events. [2021-12-16 03:03:37,215 INFO L130 PetriNetUnfolder]: For 106/106 co-relation queries the response was YES. [2021-12-16 03:03:37,217 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1131 conditions, 670 events. 215/670 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3318 event pairs, 214 based on Foata normal form. 6/665 useless extension candidates. Maximal degree in co-relation 942. Up to 370 conditions per place. [2021-12-16 03:03:37,221 INFO L132 encePairwiseOnDemand]: 180/186 looper letters, 17 selfloop transitions, 0 changer transitions 5/166 dead transitions. [2021-12-16 03:03:37,221 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 166 transitions, 384 flow [2021-12-16 03:03:37,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 03:03:37,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-16 03:03:37,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 347 transitions. [2021-12-16 03:03:37,231 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9327956989247311 [2021-12-16 03:03:37,232 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 347 transitions. [2021-12-16 03:03:37,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 347 transitions. [2021-12-16 03:03:37,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:03:37,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 347 transitions. [2021-12-16 03:03:37,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 173.5) internal successors, (347), 2 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:37,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:37,242 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:37,243 INFO L186 Difference]: Start difference. First operand has 175 places, 172 transitions, 362 flow. Second operand 2 states and 347 transitions. [2021-12-16 03:03:37,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 166 transitions, 384 flow [2021-12-16 03:03:37,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 166 transitions, 372 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-16 03:03:37,252 INFO L242 Difference]: Finished difference. Result has 170 places, 161 transitions, 328 flow [2021-12-16 03:03:37,253 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=328, PETRI_PLACES=170, PETRI_TRANSITIONS=161} [2021-12-16 03:03:37,257 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, -5 predicate places. [2021-12-16 03:03:37,257 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 161 transitions, 328 flow [2021-12-16 03:03:37,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 171.0) internal successors, (342), 2 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:37,258 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:03:37,259 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:03:37,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 03:03:37,259 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:03:37,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:03:37,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1309777273, now seen corresponding path program 1 times [2021-12-16 03:03:37,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:03:37,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698111205] [2021-12-16 03:03:37,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:03:37,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:03:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:03:37,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:03:37,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:03:37,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698111205] [2021-12-16 03:03:37,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698111205] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:03:37,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:03:37,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:03:37,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299749814] [2021-12-16 03:03:37,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:03:37,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:03:37,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:03:37,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:03:37,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:03:37,547 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 186 [2021-12-16 03:03:37,548 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 161 transitions, 328 flow. Second operand has 6 states, 6 states have (on average 151.66666666666666) internal successors, (910), 6 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:37,548 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:03:37,548 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 186 [2021-12-16 03:03:37,549 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:03:37,768 INFO L129 PetriNetUnfolder]: 275/841 cut-off events. [2021-12-16 03:03:37,768 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2021-12-16 03:03:37,771 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1398 conditions, 841 events. 275/841 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4325 event pairs, 274 based on Foata normal form. 41/873 useless extension candidates. Maximal degree in co-relation 1395. Up to 380 conditions per place. [2021-12-16 03:03:37,775 INFO L132 encePairwiseOnDemand]: 176/186 looper letters, 30 selfloop transitions, 6 changer transitions 12/177 dead transitions. [2021-12-16 03:03:37,775 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 177 transitions, 459 flow [2021-12-16 03:03:37,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:03:37,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:03:37,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1080 transitions. [2021-12-16 03:03:37,780 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8294930875576036 [2021-12-16 03:03:37,781 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1080 transitions. [2021-12-16 03:03:37,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1080 transitions. [2021-12-16 03:03:37,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:03:37,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1080 transitions. [2021-12-16 03:03:37,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 154.28571428571428) internal successors, (1080), 7 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:37,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:37,788 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:37,788 INFO L186 Difference]: Start difference. First operand has 170 places, 161 transitions, 328 flow. Second operand 7 states and 1080 transitions. [2021-12-16 03:03:37,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 177 transitions, 459 flow [2021-12-16 03:03:37,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 177 transitions, 459 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-16 03:03:37,794 INFO L242 Difference]: Finished difference. Result has 173 places, 162 transitions, 354 flow [2021-12-16 03:03:37,794 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=354, PETRI_PLACES=173, PETRI_TRANSITIONS=162} [2021-12-16 03:03:37,795 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, -2 predicate places. [2021-12-16 03:03:37,795 INFO L470 AbstractCegarLoop]: Abstraction has has 173 places, 162 transitions, 354 flow [2021-12-16 03:03:37,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 151.66666666666666) internal successors, (910), 6 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:37,796 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:03:37,796 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:03:37,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 03:03:37,797 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:03:37,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:03:37,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1810320027, now seen corresponding path program 1 times [2021-12-16 03:03:37,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:03:37,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067030844] [2021-12-16 03:03:37,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:03:37,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:03:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:03:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:03:38,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:03:38,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067030844] [2021-12-16 03:03:38,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067030844] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:03:38,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574661263] [2021-12-16 03:03:38,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:03:38,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:03:38,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:03:38,322 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) [2021-12-16 03:03:38,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 03:03:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:03:38,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-16 03:03:38,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:03:39,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 03:03:39,704 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 03:03:39,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 13 [2021-12-16 03:03:39,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:03:39,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:03:40,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 03:03:40,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 32 [2021-12-16 03:03:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:03:40,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574661263] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:03:40,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:03:40,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 19] total 46 [2021-12-16 03:03:40,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428402471] [2021-12-16 03:03:40,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:03:40,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-16 03:03:40,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:03:40,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-16 03:03:40,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1795, Unknown=0, NotChecked=0, Total=2070 [2021-12-16 03:03:40,912 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 186 [2021-12-16 03:03:40,916 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 162 transitions, 354 flow. Second operand has 46 states, 46 states have (on average 100.65217391304348) internal successors, (4630), 46 states have internal predecessors, (4630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:40,916 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:03:40,916 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 186 [2021-12-16 03:03:40,916 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:03:47,003 INFO L129 PetriNetUnfolder]: 3061/7198 cut-off events. [2021-12-16 03:03:47,004 INFO L130 PetriNetUnfolder]: For 740/742 co-relation queries the response was YES. [2021-12-16 03:03:47,017 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13599 conditions, 7198 events. 3061/7198 cut-off events. For 740/742 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 67022 event pairs, 692 based on Foata normal form. 3/7136 useless extension candidates. Maximal degree in co-relation 13593. Up to 1234 conditions per place. [2021-12-16 03:03:47,040 INFO L132 encePairwiseOnDemand]: 138/186 looper letters, 351 selfloop transitions, 340 changer transitions 12/787 dead transitions. [2021-12-16 03:03:47,040 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 787 transitions, 3318 flow [2021-12-16 03:03:47,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-12-16 03:03:47,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2021-12-16 03:03:47,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 11084 transitions. [2021-12-16 03:03:47,059 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5569289518641343 [2021-12-16 03:03:47,059 INFO L72 ComplementDD]: Start complementDD. Operand 107 states and 11084 transitions. [2021-12-16 03:03:47,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 11084 transitions. [2021-12-16 03:03:47,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:03:47,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 107 states and 11084 transitions. [2021-12-16 03:03:47,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 108 states, 107 states have (on average 103.58878504672897) internal successors, (11084), 107 states have internal predecessors, (11084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:47,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 108 states, 108 states have (on average 186.0) internal successors, (20088), 108 states have internal predecessors, (20088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:47,112 INFO L81 ComplementDD]: Finished complementDD. Result has 108 states, 108 states have (on average 186.0) internal successors, (20088), 108 states have internal predecessors, (20088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:47,112 INFO L186 Difference]: Start difference. First operand has 173 places, 162 transitions, 354 flow. Second operand 107 states and 11084 transitions. [2021-12-16 03:03:47,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 787 transitions, 3318 flow [2021-12-16 03:03:47,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 787 transitions, 3308 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-16 03:03:47,128 INFO L242 Difference]: Finished difference. Result has 318 places, 548 transitions, 2604 flow [2021-12-16 03:03:47,128 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=107, PETRI_FLOW=2604, PETRI_PLACES=318, PETRI_TRANSITIONS=548} [2021-12-16 03:03:47,130 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, 143 predicate places. [2021-12-16 03:03:47,130 INFO L470 AbstractCegarLoop]: Abstraction has has 318 places, 548 transitions, 2604 flow [2021-12-16 03:03:47,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 100.65217391304348) internal successors, (4630), 46 states have internal predecessors, (4630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:47,132 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:03:47,132 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:03:47,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 03:03:47,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:03:47,353 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:03:47,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:03:47,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1563136097, now seen corresponding path program 2 times [2021-12-16 03:03:47,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:03:47,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419940879] [2021-12-16 03:03:47,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:03:47,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:03:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:03:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 03:03:47,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:03:47,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419940879] [2021-12-16 03:03:47,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419940879] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:03:47,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:03:47,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 03:03:47,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413151064] [2021-12-16 03:03:47,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:03:47,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 03:03:47,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:03:47,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 03:03:47,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 03:03:47,485 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 186 [2021-12-16 03:03:47,486 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 548 transitions, 2604 flow. Second operand has 7 states, 7 states have (on average 152.42857142857142) internal successors, (1067), 7 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:47,486 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:03:47,486 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 186 [2021-12-16 03:03:47,486 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:03:50,756 INFO L129 PetriNetUnfolder]: 10048/21283 cut-off events. [2021-12-16 03:03:50,756 INFO L130 PetriNetUnfolder]: For 134242/135105 co-relation queries the response was YES. [2021-12-16 03:03:50,945 INFO L84 FinitePrefix]: Finished finitePrefix Result has 80501 conditions, 21283 events. 10048/21283 cut-off events. For 134242/135105 co-relation queries the response was YES. Maximal size of possible extension queue 1260. Compared 217770 event pairs, 2049 based on Foata normal form. 287/20987 useless extension candidates. Maximal degree in co-relation 80451. Up to 4818 conditions per place. [2021-12-16 03:03:51,054 INFO L132 encePairwiseOnDemand]: 176/186 looper letters, 1026 selfloop transitions, 18 changer transitions 5/1301 dead transitions. [2021-12-16 03:03:51,054 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 1301 transitions, 9059 flow [2021-12-16 03:03:51,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 03:03:51,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-16 03:03:51,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1444 transitions. [2021-12-16 03:03:51,056 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8626045400238949 [2021-12-16 03:03:51,056 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1444 transitions. [2021-12-16 03:03:51,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1444 transitions. [2021-12-16 03:03:51,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:03:51,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1444 transitions. [2021-12-16 03:03:51,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 160.44444444444446) internal successors, (1444), 9 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:51,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 186.0) internal successors, (1860), 10 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:51,061 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 186.0) internal successors, (1860), 10 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:51,061 INFO L186 Difference]: Start difference. First operand has 318 places, 548 transitions, 2604 flow. Second operand 9 states and 1444 transitions. [2021-12-16 03:03:51,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 1301 transitions, 9059 flow [2021-12-16 03:03:51,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 1301 transitions, 8173 flow, removed 435 selfloop flow, removed 13 redundant places. [2021-12-16 03:03:51,660 INFO L242 Difference]: Finished difference. Result has 314 places, 562 transitions, 2444 flow [2021-12-16 03:03:51,661 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=2338, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2444, PETRI_PLACES=314, PETRI_TRANSITIONS=562} [2021-12-16 03:03:51,662 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, 139 predicate places. [2021-12-16 03:03:51,662 INFO L470 AbstractCegarLoop]: Abstraction has has 314 places, 562 transitions, 2444 flow [2021-12-16 03:03:51,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 152.42857142857142) internal successors, (1067), 7 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:51,662 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:03:51,663 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:03:51,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 03:03:51,663 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:03:51,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:03:51,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1687811513, now seen corresponding path program 3 times [2021-12-16 03:03:51,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:03:51,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657484885] [2021-12-16 03:03:51,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:03:51,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:03:51,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:03:51,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 03:03:51,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:03:51,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657484885] [2021-12-16 03:03:51,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657484885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:03:51,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:03:51,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 03:03:51,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398417741] [2021-12-16 03:03:51,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:03:51,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 03:03:51,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:03:51,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 03:03:51,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 03:03:51,718 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 186 [2021-12-16 03:03:51,719 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 562 transitions, 2444 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:51,719 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:03:51,719 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 186 [2021-12-16 03:03:51,719 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:03:53,902 INFO L129 PetriNetUnfolder]: 6666/16084 cut-off events. [2021-12-16 03:03:53,902 INFO L130 PetriNetUnfolder]: For 95160/95960 co-relation queries the response was YES. [2021-12-16 03:03:54,049 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58098 conditions, 16084 events. 6666/16084 cut-off events. For 95160/95960 co-relation queries the response was YES. Maximal size of possible extension queue 1102. Compared 174698 event pairs, 2499 based on Foata normal form. 73/15616 useless extension candidates. Maximal degree in co-relation 58047. Up to 8706 conditions per place. [2021-12-16 03:03:54,131 INFO L132 encePairwiseOnDemand]: 183/186 looper letters, 321 selfloop transitions, 2 changer transitions 0/599 dead transitions. [2021-12-16 03:03:54,131 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 599 transitions, 3294 flow [2021-12-16 03:03:54,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 03:03:54,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-16 03:03:54,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2021-12-16 03:03:54,134 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9032258064516129 [2021-12-16 03:03:54,134 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2021-12-16 03:03:54,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2021-12-16 03:03:54,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:03:54,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2021-12-16 03:03:54,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:54,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:54,141 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:54,141 INFO L186 Difference]: Start difference. First operand has 314 places, 562 transitions, 2444 flow. Second operand 3 states and 504 transitions. [2021-12-16 03:03:54,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 599 transitions, 3294 flow [2021-12-16 03:03:54,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 599 transitions, 3294 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-16 03:03:54,478 INFO L242 Difference]: Finished difference. Result has 317 places, 562 transitions, 2452 flow [2021-12-16 03:03:54,478 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=2444, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2452, PETRI_PLACES=317, PETRI_TRANSITIONS=562} [2021-12-16 03:03:54,479 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, 142 predicate places. [2021-12-16 03:03:54,479 INFO L470 AbstractCegarLoop]: Abstraction has has 317 places, 562 transitions, 2452 flow [2021-12-16 03:03:54,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:54,480 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:03:54,480 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:03:54,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 03:03:54,480 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:03:54,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:03:54,481 INFO L85 PathProgramCache]: Analyzing trace with hash 2146831921, now seen corresponding path program 4 times [2021-12-16 03:03:54,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:03:54,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747866134] [2021-12-16 03:03:54,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:03:54,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:03:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:03:55,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:03:55,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:03:55,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747866134] [2021-12-16 03:03:55,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747866134] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:03:55,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494513315] [2021-12-16 03:03:55,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 03:03:55,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:03:55,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:03:55,015 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) [2021-12-16 03:03:55,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 03:03:55,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 03:03:55,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:03:55,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-16 03:03:55,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:03:55,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 03:03:55,799 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 03:03:55,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2021-12-16 03:03:55,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:03:55,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:03:56,017 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-16 03:03:56,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2021-12-16 03:03:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:03:56,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494513315] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:03:56,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:03:56,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20, 15] total 43 [2021-12-16 03:03:56,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182607769] [2021-12-16 03:03:56,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:03:56,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-16 03:03:56,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:03:56,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-16 03:03:56,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1576, Unknown=0, NotChecked=0, Total=1806 [2021-12-16 03:03:56,413 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 186 [2021-12-16 03:03:56,417 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 562 transitions, 2452 flow. Second operand has 43 states, 43 states have (on average 100.86046511627907) internal successors, (4337), 43 states have internal predecessors, (4337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:56,417 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:03:56,417 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 186 [2021-12-16 03:03:56,417 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:04:03,674 INFO L129 PetriNetUnfolder]: 10010/23820 cut-off events. [2021-12-16 03:04:03,675 INFO L130 PetriNetUnfolder]: For 267212/268525 co-relation queries the response was YES. [2021-12-16 03:04:03,883 INFO L84 FinitePrefix]: Finished finitePrefix Result has 106298 conditions, 23820 events. 10010/23820 cut-off events. For 267212/268525 co-relation queries the response was YES. Maximal size of possible extension queue 1742. Compared 273468 event pairs, 2997 based on Foata normal form. 171/23434 useless extension candidates. Maximal degree in co-relation 106245. Up to 4192 conditions per place. [2021-12-16 03:04:03,979 INFO L132 encePairwiseOnDemand]: 143/186 looper letters, 488 selfloop transitions, 558 changer transitions 119/1263 dead transitions. [2021-12-16 03:04:03,979 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 1263 transitions, 9164 flow [2021-12-16 03:04:03,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-16 03:04:03,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-12-16 03:04:03,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 6500 transitions. [2021-12-16 03:04:03,988 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5547021676053934 [2021-12-16 03:04:03,988 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 6500 transitions. [2021-12-16 03:04:03,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 6500 transitions. [2021-12-16 03:04:03,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:04:03,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 6500 transitions. [2021-12-16 03:04:04,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 103.17460317460318) internal successors, (6500), 63 states have internal predecessors, (6500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:04,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 186.0) internal successors, (11904), 64 states have internal predecessors, (11904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:04,016 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 186.0) internal successors, (11904), 64 states have internal predecessors, (11904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:04,016 INFO L186 Difference]: Start difference. First operand has 317 places, 562 transitions, 2452 flow. Second operand 63 states and 6500 transitions. [2021-12-16 03:04:04,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 1263 transitions, 9164 flow [2021-12-16 03:04:04,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1263 transitions, 9160 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-16 03:04:04,937 INFO L242 Difference]: Finished difference. Result has 414 places, 930 transitions, 6987 flow [2021-12-16 03:04:04,937 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=2448, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=6987, PETRI_PLACES=414, PETRI_TRANSITIONS=930} [2021-12-16 03:04:04,947 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, 239 predicate places. [2021-12-16 03:04:04,947 INFO L470 AbstractCegarLoop]: Abstraction has has 414 places, 930 transitions, 6987 flow [2021-12-16 03:04:04,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 100.86046511627907) internal successors, (4337), 43 states have internal predecessors, (4337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:04,949 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:04:04,949 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:04:05,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 03:04:05,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-16 03:04:05,231 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:04:05,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:04:05,232 INFO L85 PathProgramCache]: Analyzing trace with hash -372066291, now seen corresponding path program 5 times [2021-12-16 03:04:05,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:04:05,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185477180] [2021-12-16 03:04:05,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:04:05,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:04:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:04:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:04:05,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:04:05,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185477180] [2021-12-16 03:04:05,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185477180] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:04:05,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584349817] [2021-12-16 03:04:05,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 03:04:05,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:04:05,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:04:05,578 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) [2021-12-16 03:04:05,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 03:04:05,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:04:05,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:04:05,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-16 03:04:05,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:04:06,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 03:04:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:04:06,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:04:06,375 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-16 03:04:06,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2021-12-16 03:04:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:04:06,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584349817] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:04:06,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:04:06,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 15] total 36 [2021-12-16 03:04:06,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469109556] [2021-12-16 03:04:06,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:04:06,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-16 03:04:06,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:04:06,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-16 03:04:06,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2021-12-16 03:04:06,820 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 186 [2021-12-16 03:04:06,822 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 930 transitions, 6987 flow. Second operand has 36 states, 36 states have (on average 103.02777777777777) internal successors, (3709), 36 states have internal predecessors, (3709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:06,822 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:04:06,822 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 186 [2021-12-16 03:04:06,822 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:04:16,445 INFO L129 PetriNetUnfolder]: 12469/33164 cut-off events. [2021-12-16 03:04:16,445 INFO L130 PetriNetUnfolder]: For 919805/922594 co-relation queries the response was YES. [2021-12-16 03:04:17,193 INFO L84 FinitePrefix]: Finished finitePrefix Result has 204108 conditions, 33164 events. 12469/33164 cut-off events. For 919805/922594 co-relation queries the response was YES. Maximal size of possible extension queue 2503. Compared 424964 event pairs, 2650 based on Foata normal form. 515/33094 useless extension candidates. Maximal degree in co-relation 204018. Up to 8289 conditions per place. [2021-12-16 03:04:17,353 INFO L132 encePairwiseOnDemand]: 149/186 looper letters, 973 selfloop transitions, 633 changer transitions 239/1945 dead transitions. [2021-12-16 03:04:17,354 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 1945 transitions, 20760 flow [2021-12-16 03:04:17,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-16 03:04:17,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-12-16 03:04:17,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 5714 transitions. [2021-12-16 03:04:17,359 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5688968538430904 [2021-12-16 03:04:17,359 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 5714 transitions. [2021-12-16 03:04:17,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 5714 transitions. [2021-12-16 03:04:17,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:04:17,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 5714 transitions. [2021-12-16 03:04:17,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 105.81481481481481) internal successors, (5714), 54 states have internal predecessors, (5714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:17,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 186.0) internal successors, (10230), 55 states have internal predecessors, (10230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:17,374 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 186.0) internal successors, (10230), 55 states have internal predecessors, (10230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:17,375 INFO L186 Difference]: Start difference. First operand has 414 places, 930 transitions, 6987 flow. Second operand 54 states and 5714 transitions. [2021-12-16 03:04:17,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 1945 transitions, 20760 flow [2021-12-16 03:04:23,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 1945 transitions, 19476 flow, removed 622 selfloop flow, removed 34 redundant places. [2021-12-16 03:04:24,018 INFO L242 Difference]: Finished difference. Result has 442 places, 1291 transitions, 11615 flow [2021-12-16 03:04:24,020 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=6537, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=930, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=11615, PETRI_PLACES=442, PETRI_TRANSITIONS=1291} [2021-12-16 03:04:24,020 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, 267 predicate places. [2021-12-16 03:04:24,020 INFO L470 AbstractCegarLoop]: Abstraction has has 442 places, 1291 transitions, 11615 flow [2021-12-16 03:04:24,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 103.02777777777777) internal successors, (3709), 36 states have internal predecessors, (3709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:24,021 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:04:24,021 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:04:24,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 03:04:24,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:04:24,234 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:04:24,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:04:24,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1327946159, now seen corresponding path program 6 times [2021-12-16 03:04:24,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:04:24,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946850126] [2021-12-16 03:04:24,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:04:24,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:04:24,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:04:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:04:24,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:04:24,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946850126] [2021-12-16 03:04:24,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946850126] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:04:24,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344348178] [2021-12-16 03:04:24,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 03:04:24,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:04:24,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:04:24,586 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) [2021-12-16 03:04:24,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 03:04:24,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2021-12-16 03:04:24,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:04:24,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-16 03:04:24,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:04:25,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 03:04:25,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2021-12-16 03:04:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 03:04:25,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:04:25,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344348178] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:04:25,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:04:25,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [21] total 28 [2021-12-16 03:04:25,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169482403] [2021-12-16 03:04:25,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:04:25,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 03:04:25,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:04:25,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 03:04:25,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=689, Unknown=0, NotChecked=0, Total=756 [2021-12-16 03:04:25,086 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 186 [2021-12-16 03:04:25,087 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 1291 transitions, 11615 flow. Second operand has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:25,087 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:04:25,087 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 186 [2021-12-16 03:04:25,087 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:04:37,141 INFO L129 PetriNetUnfolder]: 15980/41793 cut-off events. [2021-12-16 03:04:37,141 INFO L130 PetriNetUnfolder]: For 1261508/1264951 co-relation queries the response was YES. [2021-12-16 03:04:38,075 INFO L84 FinitePrefix]: Finished finitePrefix Result has 282103 conditions, 41793 events. 15980/41793 cut-off events. For 1261508/1264951 co-relation queries the response was YES. Maximal size of possible extension queue 3164. Compared 549176 event pairs, 2831 based on Foata normal form. 424/41433 useless extension candidates. Maximal degree in co-relation 282002. Up to 18060 conditions per place.