./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/goblint-regression/28-race_reach_92-evilcollapse_racing.i -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 dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:18:46,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:18:46,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:18:46,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:18:46,635 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:18:46,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:18:46,637 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:18:46,638 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:18:46,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:18:46,640 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:18:46,640 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:18:46,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:18:46,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:18:46,643 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:18:46,644 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:18:46,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:18:46,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:18:46,649 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:18:46,652 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:18:46,653 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:18:46,656 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:18:46,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:18:46,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:18:46,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:18:46,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:18:46,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:18:46,660 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:18:46,660 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:18:46,660 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:18:46,661 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:18:46,661 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:18:46,661 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:18:46,662 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:18:46,662 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:18:46,663 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:18:46,663 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:18:46,663 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:18:46,664 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:18:46,664 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:18:46,664 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:18:46,665 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:18:46,665 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:18:46,666 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:18:46,679 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:18:46,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:18:46,679 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:18:46,679 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:18:46,680 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:18:46,680 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:18:46,681 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:18:46,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:18:46,681 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:18:46,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:18:46,681 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:18:46,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:18:46,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:18:46,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:18:46,682 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:18:46,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:18:46,682 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:18:46,683 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:18:46,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:18:46,683 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:18:46,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:18:46,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:18:46,683 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:18:46,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:18:46,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:18:46,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:18:46,684 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:18:46,684 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:18:46,685 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:18:46,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:18:46,685 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:18:46,685 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:18:46,685 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:18:46,685 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 [2022-07-12 10:18:46,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:18:46,898 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:18:46,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:18:46,902 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:18:46,902 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:18:46,904 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i [2022-07-12 10:18:46,947 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13bcf7441/f3446de3c1a84e6a9e434e9d11806e46/FLAGeaacfa0f8 [2022-07-12 10:18:47,386 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:18:47,387 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing.i [2022-07-12 10:18:47,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13bcf7441/f3446de3c1a84e6a9e434e9d11806e46/FLAGeaacfa0f8 [2022-07-12 10:18:47,420 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13bcf7441/f3446de3c1a84e6a9e434e9d11806e46 [2022-07-12 10:18:47,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:18:47,423 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:18:47,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:18:47,425 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:18:47,428 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:18:47,429 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:18:47" (1/1) ... [2022-07-12 10:18:47,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@96c760f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:47, skipping insertion in model container [2022-07-12 10:18:47,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:18:47" (1/1) ... [2022-07-12 10:18:47,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:18:47,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:18:47,745 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/goblint-regression/28-race_reach_92-evilcollapse_racing.i[47038,47051] [2022-07-12 10:18:47,761 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-12 10:18:47,762 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-12 10:18:47,762 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-12 10:18:47,764 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-12 10:18:47,790 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:18:47,806 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:18:47,841 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/goblint-regression/28-race_reach_92-evilcollapse_racing.i[47038,47051] [2022-07-12 10:18:47,847 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-12 10:18:47,850 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-12 10:18:47,850 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-12 10:18:47,850 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-12 10:18:47,860 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:18:47,902 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:18:47,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:47 WrapperNode [2022-07-12 10:18:47,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:18:47,904 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:18:47,904 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:18:47,905 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:18:47,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:47" (1/1) ... [2022-07-12 10:18:47,927 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:47" (1/1) ... [2022-07-12 10:18:47,948 INFO L137 Inliner]: procedures = 278, calls = 51, calls flagged for inlining = 11, calls inlined = 12, statements flattened = 221 [2022-07-12 10:18:47,949 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:18:47,952 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:18:47,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:18:47,953 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:18:47,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:47" (1/1) ... [2022-07-12 10:18:47,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:47" (1/1) ... [2022-07-12 10:18:47,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:47" (1/1) ... [2022-07-12 10:18:47,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:47" (1/1) ... [2022-07-12 10:18:47,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:47" (1/1) ... [2022-07-12 10:18:47,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:47" (1/1) ... [2022-07-12 10:18:47,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:47" (1/1) ... [2022-07-12 10:18:47,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:18:47,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:18:47,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:18:47,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:18:47,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:47" (1/1) ... [2022-07-12 10:18:47,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:18:48,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:48,010 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) [2022-07-12 10:18:48,016 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 [2022-07-12 10:18:48,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:18:48,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 10:18:48,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:18:48,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:18:48,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:18:48,040 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-12 10:18:48,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 10:18:48,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:18:48,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 10:18:48,041 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-12 10:18:48,041 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-12 10:18:48,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:18:48,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:18:48,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:18:48,042 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:18:48,192 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:18:48,193 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:18:48,452 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:18:48,458 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:18:48,459 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2022-07-12 10:18:48,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:18:48 BoogieIcfgContainer [2022-07-12 10:18:48,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:18:48,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:18:48,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:18:48,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:18:48,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:18:47" (1/3) ... [2022-07-12 10:18:48,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@682410bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:18:48, skipping insertion in model container [2022-07-12 10:18:48,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:47" (2/3) ... [2022-07-12 10:18:48,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@682410bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:18:48, skipping insertion in model container [2022-07-12 10:18:48,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:18:48" (3/3) ... [2022-07-12 10:18:48,469 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_92-evilcollapse_racing.i [2022-07-12 10:18:48,472 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:18:48,478 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:18:48,479 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:18:48,479 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:18:48,545 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-12 10:18:48,581 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 230 places, 253 transitions, 514 flow [2022-07-12 10:18:48,659 INFO L129 PetriNetUnfolder]: 28/270 cut-off events. [2022-07-12 10:18:48,660 INFO L130 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-07-12 10:18:48,666 INFO L84 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 270 events. 28/270 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 413 event pairs, 0 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 152. Up to 4 conditions per place. [2022-07-12 10:18:48,666 INFO L82 GeneralOperation]: Start removeDead. Operand has 230 places, 253 transitions, 514 flow [2022-07-12 10:18:48,675 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 248 transitions, 501 flow [2022-07-12 10:18:48,687 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:18:48,693 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@46d38f4b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@107425bd [2022-07-12 10:18:48,693 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-12 10:18:48,713 INFO L129 PetriNetUnfolder]: 10/179 cut-off events. [2022-07-12 10:18:48,713 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:18:48,713 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:48,714 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:48,714 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:18:48,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:48,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1010357811, now seen corresponding path program 1 times [2022-07-12 10:18:48,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:48,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603454763] [2022-07-12 10:18:48,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:48,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:18:48,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:48,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603454763] [2022-07-12 10:18:48,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603454763] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:18:48,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:18:48,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:18:48,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050916000] [2022-07-12 10:18:48,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:18:48,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:18:48,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:48,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:18:48,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:18:48,969 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 253 [2022-07-12 10:18:48,974 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 248 transitions, 501 flow. Second operand has 3 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:48,974 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:48,975 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 253 [2022-07-12 10:18:48,975 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:49,066 INFO L129 PetriNetUnfolder]: 6/292 cut-off events. [2022-07-12 10:18:49,067 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:18:49,068 INFO L84 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 292 events. 6/292 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 408 event pairs, 0 based on Foata normal form. 22/300 useless extension candidates. Maximal degree in co-relation 213. Up to 12 conditions per place. [2022-07-12 10:18:49,070 INFO L132 encePairwiseOnDemand]: 230/253 looper letters, 16 selfloop transitions, 2 changer transitions 2/234 dead transitions. [2022-07-12 10:18:49,070 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 234 transitions, 509 flow [2022-07-12 10:18:49,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:18:49,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:18:49,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 701 transitions. [2022-07-12 10:18:49,090 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9235836627140975 [2022-07-12 10:18:49,091 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 701 transitions. [2022-07-12 10:18:49,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 701 transitions. [2022-07-12 10:18:49,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:49,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 701 transitions. [2022-07-12 10:18:49,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:49,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:49,105 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:49,106 INFO L186 Difference]: Start difference. First operand has 226 places, 248 transitions, 501 flow. Second operand 3 states and 701 transitions. [2022-07-12 10:18:49,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 234 transitions, 509 flow [2022-07-12 10:18:49,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 234 transitions, 509 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:18:49,113 INFO L242 Difference]: Finished difference. Result has 228 places, 226 transitions, 467 flow [2022-07-12 10:18:49,114 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=467, PETRI_PLACES=228, PETRI_TRANSITIONS=226} [2022-07-12 10:18:49,121 INFO L279 CegarLoopForPetriNet]: 226 programPoint places, 2 predicate places. [2022-07-12 10:18:49,121 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 226 transitions, 467 flow [2022-07-12 10:18:49,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:49,122 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:49,122 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:49,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:18:49,122 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:18:49,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:49,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1795324933, now seen corresponding path program 1 times [2022-07-12 10:18:49,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:49,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266885605] [2022-07-12 10:18:49,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:49,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:49,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:49,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:18:49,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:49,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266885605] [2022-07-12 10:18:49,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266885605] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:18:49,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:18:49,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:18:49,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192015276] [2022-07-12 10:18:49,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:18:49,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:18:49,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:49,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:18:49,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:18:49,232 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 253 [2022-07-12 10:18:49,233 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 226 transitions, 467 flow. Second operand has 3 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:49,233 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:49,233 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 253 [2022-07-12 10:18:49,233 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:49,286 INFO L129 PetriNetUnfolder]: 6/362 cut-off events. [2022-07-12 10:18:49,286 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:18:49,287 INFO L84 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 362 events. 6/362 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 544 event pairs, 0 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 292. Up to 15 conditions per place. [2022-07-12 10:18:49,288 INFO L132 encePairwiseOnDemand]: 250/253 looper letters, 10 selfloop transitions, 2 changer transitions 0/230 dead transitions. [2022-07-12 10:18:49,288 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 230 transitions, 499 flow [2022-07-12 10:18:49,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:18:49,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:18:49,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2022-07-12 10:18:49,290 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8985507246376812 [2022-07-12 10:18:49,290 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2022-07-12 10:18:49,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2022-07-12 10:18:49,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:49,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2022-07-12 10:18:49,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:49,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:49,294 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:49,294 INFO L186 Difference]: Start difference. First operand has 228 places, 226 transitions, 467 flow. Second operand 3 states and 682 transitions. [2022-07-12 10:18:49,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 230 transitions, 499 flow [2022-07-12 10:18:49,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 230 transitions, 497 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:49,303 INFO L242 Difference]: Finished difference. Result has 228 places, 227 transitions, 477 flow [2022-07-12 10:18:49,303 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=477, PETRI_PLACES=228, PETRI_TRANSITIONS=227} [2022-07-12 10:18:49,304 INFO L279 CegarLoopForPetriNet]: 226 programPoint places, 2 predicate places. [2022-07-12 10:18:49,304 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 227 transitions, 477 flow [2022-07-12 10:18:49,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:49,305 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:49,305 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:49,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:18:49,305 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:18:49,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:49,306 INFO L85 PathProgramCache]: Analyzing trace with hash 165065027, now seen corresponding path program 1 times [2022-07-12 10:18:49,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:49,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082122447] [2022-07-12 10:18:49,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:49,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:49,361 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 10:18:49,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724085903] [2022-07-12 10:18:49,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:49,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:49,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:49,363 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) [2022-07-12 10:18:49,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:18:49,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:49,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:18:49,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:18:49,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:18:49,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:49,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082122447] [2022-07-12 10:18:49,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 10:18:49,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724085903] [2022-07-12 10:18:49,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724085903] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:49,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:18:49,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-12 10:18:49,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794998494] [2022-07-12 10:18:49,738 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:49,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:18:49,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:49,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:18:49,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:18:49,743 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 253 [2022-07-12 10:18:49,745 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 227 transitions, 477 flow. Second operand has 8 states, 8 states have (on average 224.0) internal successors, (1792), 8 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:49,745 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:49,745 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 253 [2022-07-12 10:18:49,745 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:49,834 INFO L129 PetriNetUnfolder]: 6/440 cut-off events. [2022-07-12 10:18:49,834 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-12 10:18:49,835 INFO L84 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 440 events. 6/440 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 477 event pairs, 0 based on Foata normal form. 4/435 useless extension candidates. Maximal degree in co-relation 397. Up to 10 conditions per place. [2022-07-12 10:18:49,836 INFO L132 encePairwiseOnDemand]: 247/253 looper letters, 11 selfloop transitions, 9 changer transitions 0/237 dead transitions. [2022-07-12 10:18:49,836 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 237 transitions, 539 flow [2022-07-12 10:18:49,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:18:49,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:18:49,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2020 transitions. [2022-07-12 10:18:49,841 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8871321914800175 [2022-07-12 10:18:49,841 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2020 transitions. [2022-07-12 10:18:49,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2020 transitions. [2022-07-12 10:18:49,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:49,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2020 transitions. [2022-07-12 10:18:49,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 224.44444444444446) internal successors, (2020), 9 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:49,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 253.0) internal successors, (2530), 10 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:49,850 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 253.0) internal successors, (2530), 10 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:49,850 INFO L186 Difference]: Start difference. First operand has 228 places, 227 transitions, 477 flow. Second operand 9 states and 2020 transitions. [2022-07-12 10:18:49,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 237 transitions, 539 flow [2022-07-12 10:18:49,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 237 transitions, 537 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:49,855 INFO L242 Difference]: Finished difference. Result has 238 places, 233 transitions, 525 flow [2022-07-12 10:18:49,855 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=525, PETRI_PLACES=238, PETRI_TRANSITIONS=233} [2022-07-12 10:18:49,857 INFO L279 CegarLoopForPetriNet]: 226 programPoint places, 12 predicate places. [2022-07-12 10:18:49,857 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 233 transitions, 525 flow [2022-07-12 10:18:49,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 224.0) internal successors, (1792), 8 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:49,859 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:49,859 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:49,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:18:50,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:50,076 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:18:50,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:50,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1787124669, now seen corresponding path program 2 times [2022-07-12 10:18:50,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:50,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696014624] [2022-07-12 10:18:50,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:50,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:50,108 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 10:18:50,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606159118] [2022-07-12 10:18:50,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:18:50,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:50,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:50,109 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) [2022-07-12 10:18:50,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:18:50,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:18:50,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:18:50,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:18:50,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 1 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:18:50,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:50,606 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 1 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:18:50,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:50,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696014624] [2022-07-12 10:18:50,608 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 10:18:50,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606159118] [2022-07-12 10:18:50,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606159118] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:50,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:18:50,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-12 10:18:50,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660251004] [2022-07-12 10:18:50,612 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:50,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 10:18:50,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:50,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 10:18:50,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-07-12 10:18:50,617 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 253 [2022-07-12 10:18:50,621 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 233 transitions, 525 flow. Second operand has 16 states, 16 states have (on average 224.25) internal successors, (3588), 16 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:50,621 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:50,621 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 253 [2022-07-12 10:18:50,621 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:50,820 INFO L129 PetriNetUnfolder]: 6/736 cut-off events. [2022-07-12 10:18:50,821 INFO L130 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2022-07-12 10:18:50,821 INFO L84 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 736 events. 6/736 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 477 event pairs, 0 based on Foata normal form. 8/735 useless extension candidates. Maximal degree in co-relation 827. Up to 22 conditions per place. [2022-07-12 10:18:50,823 INFO L132 encePairwiseOnDemand]: 247/253 looper letters, 19 selfloop transitions, 21 changer transitions 0/257 dead transitions. [2022-07-12 10:18:50,823 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 257 transitions, 713 flow [2022-07-12 10:18:50,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:18:50,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:18:50,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4706 transitions. [2022-07-12 10:18:50,830 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8857519292301901 [2022-07-12 10:18:50,830 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4706 transitions. [2022-07-12 10:18:50,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4706 transitions. [2022-07-12 10:18:50,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:50,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4706 transitions. [2022-07-12 10:18:50,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 224.0952380952381) internal successors, (4706), 21 states have internal predecessors, (4706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:50,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 253.0) internal successors, (5566), 22 states have internal predecessors, (5566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:50,847 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 253.0) internal successors, (5566), 22 states have internal predecessors, (5566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:50,847 INFO L186 Difference]: Start difference. First operand has 238 places, 233 transitions, 525 flow. Second operand 21 states and 4706 transitions. [2022-07-12 10:18:50,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 257 transitions, 713 flow [2022-07-12 10:18:50,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 257 transitions, 699 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:50,852 INFO L242 Difference]: Finished difference. Result has 262 places, 246 transitions, 649 flow [2022-07-12 10:18:50,853 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=649, PETRI_PLACES=262, PETRI_TRANSITIONS=246} [2022-07-12 10:18:50,853 INFO L279 CegarLoopForPetriNet]: 226 programPoint places, 36 predicate places. [2022-07-12 10:18:50,853 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 246 transitions, 649 flow [2022-07-12 10:18:50,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 224.25) internal successors, (3588), 16 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:50,855 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:50,855 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:50,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:18:51,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-12 10:18:51,072 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:18:51,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:51,072 INFO L85 PathProgramCache]: Analyzing trace with hash 2129611331, now seen corresponding path program 3 times [2022-07-12 10:18:51,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:51,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148196640] [2022-07-12 10:18:51,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:51,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:51,111 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 10:18:51,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [866583586] [2022-07-12 10:18:51,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:18:51,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:51,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:51,113 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:51,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:18:51,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 10:18:51,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:18:51,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:18:51,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:51,519 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2022-07-12 10:18:51,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2022-07-12 10:18:51,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:51,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148196640] [2022-07-12 10:18:51,755 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 10:18:51,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866583586] [2022-07-12 10:18:51,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866583586] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:51,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:18:51,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-12 10:18:51,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642363316] [2022-07-12 10:18:51,756 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:51,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:18:51,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:51,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:18:51,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:18:51,758 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 253 [2022-07-12 10:18:51,759 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 246 transitions, 649 flow. Second operand has 8 states, 8 states have (on average 221.75) internal successors, (1774), 8 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:51,760 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:51,760 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 253 [2022-07-12 10:18:51,760 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:51,981 INFO L129 PetriNetUnfolder]: 7/1012 cut-off events. [2022-07-12 10:18:51,982 INFO L130 PetriNetUnfolder]: For 113/113 co-relation queries the response was YES. [2022-07-12 10:18:51,984 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1347 conditions, 1012 events. 7/1012 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 161 event pairs, 0 based on Foata normal form. 2/1005 useless extension candidates. Maximal degree in co-relation 1234. Up to 33 conditions per place. [2022-07-12 10:18:51,986 INFO L132 encePairwiseOnDemand]: 247/253 looper letters, 20 selfloop transitions, 9 changer transitions 0/262 dead transitions. [2022-07-12 10:18:51,986 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 262 transitions, 741 flow [2022-07-12 10:18:51,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:18:51,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:18:51,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2002 transitions. [2022-07-12 10:18:51,990 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8792270531400966 [2022-07-12 10:18:51,990 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2002 transitions. [2022-07-12 10:18:51,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2002 transitions. [2022-07-12 10:18:51,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:51,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2002 transitions. [2022-07-12 10:18:51,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 222.44444444444446) internal successors, (2002), 9 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:51,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 253.0) internal successors, (2530), 10 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:51,997 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 253.0) internal successors, (2530), 10 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:51,997 INFO L186 Difference]: Start difference. First operand has 262 places, 246 transitions, 649 flow. Second operand 9 states and 2002 transitions. [2022-07-12 10:18:51,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 262 transitions, 741 flow [2022-07-12 10:18:52,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 262 transitions, 717 flow, removed 6 selfloop flow, removed 6 redundant places. [2022-07-12 10:18:52,005 INFO L242 Difference]: Finished difference. Result has 267 places, 252 transitions, 675 flow [2022-07-12 10:18:52,005 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=675, PETRI_PLACES=267, PETRI_TRANSITIONS=252} [2022-07-12 10:18:52,007 INFO L279 CegarLoopForPetriNet]: 226 programPoint places, 41 predicate places. [2022-07-12 10:18:52,008 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 252 transitions, 675 flow [2022-07-12 10:18:52,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 221.75) internal successors, (1774), 8 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:52,009 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:52,009 INFO L200 CegarLoopForPetriNet]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:52,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 10:18:52,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:52,224 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:18:52,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:52,224 INFO L85 PathProgramCache]: Analyzing trace with hash -430905277, now seen corresponding path program 4 times [2022-07-12 10:18:52,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:52,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201012518] [2022-07-12 10:18:52,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:52,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:52,328 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 10:18:52,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696926212] [2022-07-12 10:18:52,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:18:52,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:52,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:52,330 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) [2022-07-12 10:18:52,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:18:52,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:18:52,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:18:52,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 3473 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:18:52,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7883 backedges. 0 proven. 5526 refuted. 0 times theorem prover too weak. 2357 trivial. 0 not checked. [2022-07-12 10:18:53,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7883 backedges. 0 proven. 5526 refuted. 0 times theorem prover too weak. 2357 trivial. 0 not checked. [2022-07-12 10:18:54,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:54,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201012518] [2022-07-12 10:18:54,554 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 10:18:54,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696926212] [2022-07-12 10:18:54,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696926212] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:54,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:18:54,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-12 10:18:54,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103428736] [2022-07-12 10:18:54,554 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:54,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 10:18:54,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:54,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 10:18:54,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-07-12 10:18:54,558 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 253 [2022-07-12 10:18:54,560 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 252 transitions, 675 flow. Second operand has 16 states, 16 states have (on average 222.375) internal successors, (3558), 16 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:54,560 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:54,560 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 253 [2022-07-12 10:18:54,560 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:55,279 INFO L129 PetriNetUnfolder]: 11/2108 cut-off events. [2022-07-12 10:18:55,279 INFO L130 PetriNetUnfolder]: For 346/346 co-relation queries the response was YES. [2022-07-12 10:18:55,281 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2822 conditions, 2108 events. 11/2108 cut-off events. For 346/346 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 165 event pairs, 0 based on Foata normal form. 4/2103 useless extension candidates. Maximal degree in co-relation 2706. Up to 70 conditions per place. [2022-07-12 10:18:55,284 INFO L132 encePairwiseOnDemand]: 247/253 looper letters, 40 selfloop transitions, 21 changer transitions 0/294 dead transitions. [2022-07-12 10:18:55,284 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 294 transitions, 941 flow [2022-07-12 10:18:55,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:18:55,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:18:55,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4664 transitions. [2022-07-12 10:18:55,292 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8778467908902692 [2022-07-12 10:18:55,292 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4664 transitions. [2022-07-12 10:18:55,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4664 transitions. [2022-07-12 10:18:55,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:55,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4664 transitions. [2022-07-12 10:18:55,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 222.0952380952381) internal successors, (4664), 21 states have internal predecessors, (4664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:55,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 253.0) internal successors, (5566), 22 states have internal predecessors, (5566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:55,321 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 253.0) internal successors, (5566), 22 states have internal predecessors, (5566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:55,321 INFO L186 Difference]: Start difference. First operand has 267 places, 252 transitions, 675 flow. Second operand 21 states and 4664 transitions. [2022-07-12 10:18:55,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 294 transitions, 941 flow [2022-07-12 10:18:55,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 294 transitions, 927 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:55,328 INFO L242 Difference]: Finished difference. Result has 291 places, 265 transitions, 799 flow [2022-07-12 10:18:55,328 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=799, PETRI_PLACES=291, PETRI_TRANSITIONS=265} [2022-07-12 10:18:55,330 INFO L279 CegarLoopForPetriNet]: 226 programPoint places, 65 predicate places. [2022-07-12 10:18:55,330 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 265 transitions, 799 flow [2022-07-12 10:18:55,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 222.375) internal successors, (3558), 16 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:55,331 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:55,332 INFO L200 CegarLoopForPetriNet]: trace histogram [49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:55,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:18:55,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:55,554 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:18:55,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:55,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1522377795, now seen corresponding path program 5 times [2022-07-12 10:18:55,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:55,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206344353] [2022-07-12 10:18:55,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:55,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:55,741 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 10:18:55,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469835016] [2022-07-12 10:18:55,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:18:55,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:55,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:55,743 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:55,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process