./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:04:40,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:04:40,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:04:40,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:04:40,821 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:04:40,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:04:40,826 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:04:40,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:04:40,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:04:40,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:04:40,836 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:04:40,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:04:40,839 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:04:40,840 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:04:40,841 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:04:40,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:04:40,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:04:40,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:04:40,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:04:40,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:04:40,856 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:04:40,857 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:04:40,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:04:40,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:04:40,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:04:40,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:04:40,868 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:04:40,868 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:04:40,869 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:04:40,869 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:04:40,870 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:04:40,870 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:04:40,872 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:04:40,873 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:04:40,874 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:04:40,875 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:04:40,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:04:40,875 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:04:40,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:04:40,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:04:40,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:04:40,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:04:40,883 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:04:40,914 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:04:40,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:04:40,916 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:04:40,916 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:04:40,917 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:04:40,917 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:04:40,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:04:40,918 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:04:40,918 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:04:40,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:04:40,919 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:04:40,919 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:04:40,919 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:04:40,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:04:40,925 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:04:40,925 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:04:40,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:04:40,926 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:04:40,926 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:04:40,926 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:04:40,926 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:04:40,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:04:40,927 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:04:40,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:04:40,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:04:40,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:04:40,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:04:40,928 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:04:40,928 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:04:40,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:04:40,928 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:04:40,929 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:04:40,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:04:40,929 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f [2022-07-21 09:04:41,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:04:41,290 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:04:41,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:04:41,293 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:04:41,294 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:04:41,295 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-07-21 09:04:41,351 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97553f98a/552c70f9eeed487ca936e1177cb1b865/FLAG51d68d63d [2022-07-21 09:04:41,735 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:04:41,735 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-07-21 09:04:41,741 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97553f98a/552c70f9eeed487ca936e1177cb1b865/FLAG51d68d63d [2022-07-21 09:04:42,139 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97553f98a/552c70f9eeed487ca936e1177cb1b865 [2022-07-21 09:04:42,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:04:42,142 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:04:42,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:04:42,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:04:42,148 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:04:42,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:04:42" (1/1) ... [2022-07-21 09:04:42,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e38a9a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:42, skipping insertion in model container [2022-07-21 09:04:42,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:04:42" (1/1) ... [2022-07-21 09:04:42,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:04:42,178 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:04:42,331 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-07-21 09:04:42,347 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:04:42,369 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:04:42,412 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-07-21 09:04:42,418 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:04:42,433 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:04:42,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:42 WrapperNode [2022-07-21 09:04:42,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:04:42,435 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:04:42,435 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:04:42,435 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:04:42,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:42" (1/1) ... [2022-07-21 09:04:42,461 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:42" (1/1) ... [2022-07-21 09:04:42,504 INFO L137 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 15, calls inlined = 27, statements flattened = 271 [2022-07-21 09:04:42,507 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:04:42,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:04:42,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:04:42,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:04:42,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:42" (1/1) ... [2022-07-21 09:04:42,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:42" (1/1) ... [2022-07-21 09:04:42,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:42" (1/1) ... [2022-07-21 09:04:42,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:42" (1/1) ... [2022-07-21 09:04:42,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:42" (1/1) ... [2022-07-21 09:04:42,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:42" (1/1) ... [2022-07-21 09:04:42,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:42" (1/1) ... [2022-07-21 09:04:42,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:04:42,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:04:42,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:04:42,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:04:42,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:42" (1/1) ... [2022-07-21 09:04:42,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:04:42,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:04:42,601 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) [2022-07-21 09:04:42,605 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 [2022-07-21 09:04:42,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:04:42,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:04:42,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:04:42,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:04:42,639 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:04:42,639 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:04:42,639 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:04:42,639 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:04:42,640 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-21 09:04:42,640 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-21 09:04:42,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:04:42,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 09:04:42,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:04:42,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:04:42,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:04:42,642 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:04:42,751 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:04:42,752 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:04:43,116 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:04:43,128 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:04:43,129 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-21 09:04:43,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:04:43 BoogieIcfgContainer [2022-07-21 09:04:43,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:04:43,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:04:43,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:04:43,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:04:43,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:04:42" (1/3) ... [2022-07-21 09:04:43,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2636bd0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:04:43, skipping insertion in model container [2022-07-21 09:04:43,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:42" (2/3) ... [2022-07-21 09:04:43,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2636bd0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:04:43, skipping insertion in model container [2022-07-21 09:04:43,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:04:43" (3/3) ... [2022-07-21 09:04:43,155 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2022-07-21 09:04:43,161 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:04:43,174 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:04:43,174 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:04:43,174 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:04:43,304 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-21 09:04:43,348 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 349 places, 368 transitions, 760 flow [2022-07-21 09:04:43,498 INFO L129 PetriNetUnfolder]: 29/365 cut-off events. [2022-07-21 09:04:43,499 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 09:04:43,507 INFO L84 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 365 events. 29/365 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 515 event pairs, 0 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 239. Up to 2 conditions per place. [2022-07-21 09:04:43,507 INFO L82 GeneralOperation]: Start removeDead. Operand has 349 places, 368 transitions, 760 flow [2022-07-21 09:04:43,519 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 335 places, 354 transitions, 726 flow [2022-07-21 09:04:43,538 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:04:43,545 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@55ff392, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@78ba6cc2 [2022-07-21 09:04:43,545 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-21 09:04:43,640 INFO L129 PetriNetUnfolder]: 28/346 cut-off events. [2022-07-21 09:04:43,640 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 09:04:43,640 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:43,641 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:43,642 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:04:43,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:43,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1666240478, now seen corresponding path program 1 times [2022-07-21 09:04:43,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:43,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367119335] [2022-07-21 09:04:43,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:43,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:43,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:43,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:43,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367119335] [2022-07-21 09:04:43,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367119335] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:04:43,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:04:43,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:04:43,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312069540] [2022-07-21 09:04:43,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:43,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:04:43,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:43,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:04:43,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:04:43,958 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 368 [2022-07-21 09:04:43,967 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 354 transitions, 726 flow. Second operand has 2 states, 2 states have (on average 343.0) internal successors, (686), 2 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:43,967 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:43,967 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 368 [2022-07-21 09:04:43,968 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:44,045 INFO L129 PetriNetUnfolder]: 6/331 cut-off events. [2022-07-21 09:04:44,045 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-07-21 09:04:44,049 INFO L84 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 331 events. 6/331 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 476 event pairs, 0 based on Foata normal form. 29/337 useless extension candidates. Maximal degree in co-relation 226. Up to 7 conditions per place. [2022-07-21 09:04:44,050 INFO L132 encePairwiseOnDemand]: 345/368 looper letters, 6 selfloop transitions, 0 changer transitions 9/331 dead transitions. [2022-07-21 09:04:44,050 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 331 transitions, 692 flow [2022-07-21 09:04:44,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:04:44,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:04:44,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 705 transitions. [2022-07-21 09:04:44,071 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9578804347826086 [2022-07-21 09:04:44,071 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 705 transitions. [2022-07-21 09:04:44,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 705 transitions. [2022-07-21 09:04:44,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:44,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 705 transitions. [2022-07-21 09:04:44,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 352.5) internal successors, (705), 2 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:44,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 368.0) internal successors, (1104), 3 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:44,090 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 368.0) internal successors, (1104), 3 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:44,091 INFO L186 Difference]: Start difference. First operand has 335 places, 354 transitions, 726 flow. Second operand 2 states and 705 transitions. [2022-07-21 09:04:44,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 331 transitions, 692 flow [2022-07-21 09:04:44,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 331 transitions, 680 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-21 09:04:44,106 INFO L242 Difference]: Finished difference. Result has 330 places, 322 transitions, 650 flow [2022-07-21 09:04:44,108 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=650, PETRI_PLACES=330, PETRI_TRANSITIONS=322} [2022-07-21 09:04:44,112 INFO L279 CegarLoopForPetriNet]: 335 programPoint places, -5 predicate places. [2022-07-21 09:04:44,112 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 322 transitions, 650 flow [2022-07-21 09:04:44,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 343.0) internal successors, (686), 2 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:44,114 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:44,114 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:44,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:04:44,115 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:04:44,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:44,116 INFO L85 PathProgramCache]: Analyzing trace with hash -596270102, now seen corresponding path program 1 times [2022-07-21 09:04:44,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:44,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034093483] [2022-07-21 09:04:44,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:44,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:44,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:44,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:44,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034093483] [2022-07-21 09:04:44,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034093483] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:04:44,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:04:44,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-21 09:04:44,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109666861] [2022-07-21 09:04:44,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:44,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 09:04:44,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:44,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 09:04:44,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-07-21 09:04:44,728 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 368 [2022-07-21 09:04:44,732 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 322 transitions, 650 flow. Second operand has 12 states, 12 states have (on average 278.5833333333333) internal successors, (3343), 12 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:44,733 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:44,738 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 368 [2022-07-21 09:04:44,738 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:45,530 INFO L129 PetriNetUnfolder]: 189/2612 cut-off events. [2022-07-21 09:04:45,531 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-07-21 09:04:45,544 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3031 conditions, 2612 events. 189/2612 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 19489 event pairs, 34 based on Foata normal form. 1/2422 useless extension candidates. Maximal degree in co-relation 3028. Up to 155 conditions per place. [2022-07-21 09:04:45,554 INFO L132 encePairwiseOnDemand]: 354/368 looper letters, 123 selfloop transitions, 9 changer transitions 20/413 dead transitions. [2022-07-21 09:04:45,554 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 413 transitions, 1148 flow [2022-07-21 09:04:45,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:04:45,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-21 09:04:45,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3441 transitions. [2022-07-21 09:04:45,562 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7792119565217391 [2022-07-21 09:04:45,562 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3441 transitions. [2022-07-21 09:04:45,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3441 transitions. [2022-07-21 09:04:45,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:45,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3441 transitions. [2022-07-21 09:04:45,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 286.75) internal successors, (3441), 12 states have internal predecessors, (3441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:45,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 368.0) internal successors, (4784), 13 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:45,581 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 368.0) internal successors, (4784), 13 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:45,581 INFO L186 Difference]: Start difference. First operand has 330 places, 322 transitions, 650 flow. Second operand 12 states and 3441 transitions. [2022-07-21 09:04:45,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 413 transitions, 1148 flow [2022-07-21 09:04:45,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 413 transitions, 1148 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:04:45,593 INFO L242 Difference]: Finished difference. Result has 341 places, 328 transitions, 713 flow [2022-07-21 09:04:45,593 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=650, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=713, PETRI_PLACES=341, PETRI_TRANSITIONS=328} [2022-07-21 09:04:45,594 INFO L279 CegarLoopForPetriNet]: 335 programPoint places, 6 predicate places. [2022-07-21 09:04:45,594 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 328 transitions, 713 flow [2022-07-21 09:04:45,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 278.5833333333333) internal successors, (3343), 12 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:45,597 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:45,597 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:45,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:04:45,598 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:04:45,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:45,598 INFO L85 PathProgramCache]: Analyzing trace with hash 822135892, now seen corresponding path program 1 times [2022-07-21 09:04:45,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:45,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100251524] [2022-07-21 09:04:45,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:45,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:45,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:45,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100251524] [2022-07-21 09:04:45,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100251524] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:04:45,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:04:45,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 09:04:45,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885740932] [2022-07-21 09:04:45,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:45,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:04:45,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:45,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:04:45,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:04:45,771 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 368 [2022-07-21 09:04:45,773 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 328 transitions, 713 flow. Second operand has 7 states, 7 states have (on average 295.7142857142857) internal successors, (2070), 7 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:45,773 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:45,773 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 368 [2022-07-21 09:04:45,774 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:46,959 INFO L129 PetriNetUnfolder]: 994/5924 cut-off events. [2022-07-21 09:04:46,960 INFO L130 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2022-07-21 09:04:47,024 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7857 conditions, 5924 events. 994/5924 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 51023 event pairs, 395 based on Foata normal form. 0/5002 useless extension candidates. Maximal degree in co-relation 7844. Up to 852 conditions per place. [2022-07-21 09:04:47,047 INFO L132 encePairwiseOnDemand]: 349/368 looper letters, 113 selfloop transitions, 28 changer transitions 0/415 dead transitions. [2022-07-21 09:04:47,047 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 415 transitions, 1185 flow [2022-07-21 09:04:47,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:04:47,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-21 09:04:47,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3333 transitions. [2022-07-21 09:04:47,055 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8233695652173914 [2022-07-21 09:04:47,055 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3333 transitions. [2022-07-21 09:04:47,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3333 transitions. [2022-07-21 09:04:47,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:47,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3333 transitions. [2022-07-21 09:04:47,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 303.0) internal successors, (3333), 11 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:47,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 368.0) internal successors, (4416), 12 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:47,071 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 368.0) internal successors, (4416), 12 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:47,071 INFO L186 Difference]: Start difference. First operand has 341 places, 328 transitions, 713 flow. Second operand 11 states and 3333 transitions. [2022-07-21 09:04:47,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 415 transitions, 1185 flow [2022-07-21 09:04:47,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 415 transitions, 1171 flow, removed 7 selfloop flow, removed 7 redundant places. [2022-07-21 09:04:47,081 INFO L242 Difference]: Finished difference. Result has 341 places, 345 transitions, 832 flow [2022-07-21 09:04:47,082 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=832, PETRI_PLACES=341, PETRI_TRANSITIONS=345} [2022-07-21 09:04:47,083 INFO L279 CegarLoopForPetriNet]: 335 programPoint places, 6 predicate places. [2022-07-21 09:04:47,083 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 345 transitions, 832 flow [2022-07-21 09:04:47,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 295.7142857142857) internal successors, (2070), 7 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:47,084 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:47,084 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:47,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 09:04:47,085 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:04:47,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:47,085 INFO L85 PathProgramCache]: Analyzing trace with hash 2058611184, now seen corresponding path program 1 times [2022-07-21 09:04:47,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:47,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948026468] [2022-07-21 09:04:47,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:47,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:47,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:47,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:47,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948026468] [2022-07-21 09:04:47,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948026468] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:04:47,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:04:47,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 09:04:47,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244260853] [2022-07-21 09:04:47,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:47,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:04:47,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:47,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:04:47,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:04:47,192 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 368 [2022-07-21 09:04:47,194 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 345 transitions, 832 flow. Second operand has 7 states, 7 states have (on average 295.7142857142857) internal successors, (2070), 7 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:47,194 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:47,194 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 368 [2022-07-21 09:04:47,194 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:48,227 INFO L129 PetriNetUnfolder]: 821/5478 cut-off events. [2022-07-21 09:04:48,228 INFO L130 PetriNetUnfolder]: For 564/600 co-relation queries the response was YES. [2022-07-21 09:04:48,259 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7311 conditions, 5478 events. 821/5478 cut-off events. For 564/600 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 46490 event pairs, 507 based on Foata normal form. 36/4847 useless extension candidates. Maximal degree in co-relation 7300. Up to 965 conditions per place. [2022-07-21 09:04:48,281 INFO L132 encePairwiseOnDemand]: 349/368 looper letters, 109 selfloop transitions, 28 changer transitions 0/413 dead transitions. [2022-07-21 09:04:48,281 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 413 transitions, 1274 flow [2022-07-21 09:04:48,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:04:48,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-21 09:04:48,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3329 transitions. [2022-07-21 09:04:48,289 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8223814229249012 [2022-07-21 09:04:48,289 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3329 transitions. [2022-07-21 09:04:48,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3329 transitions. [2022-07-21 09:04:48,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:48,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3329 transitions. [2022-07-21 09:04:48,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 302.6363636363636) internal successors, (3329), 11 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:48,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 368.0) internal successors, (4416), 12 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:48,312 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 368.0) internal successors, (4416), 12 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:48,312 INFO L186 Difference]: Start difference. First operand has 341 places, 345 transitions, 832 flow. Second operand 11 states and 3329 transitions. [2022-07-21 09:04:48,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 413 transitions, 1274 flow [2022-07-21 09:04:48,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 413 transitions, 1269 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 09:04:48,326 INFO L242 Difference]: Finished difference. Result has 351 places, 347 transitions, 895 flow [2022-07-21 09:04:48,327 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=895, PETRI_PLACES=351, PETRI_TRANSITIONS=347} [2022-07-21 09:04:48,329 INFO L279 CegarLoopForPetriNet]: 335 programPoint places, 16 predicate places. [2022-07-21 09:04:48,329 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 347 transitions, 895 flow [2022-07-21 09:04:48,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 295.7142857142857) internal successors, (2070), 7 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:48,330 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:48,331 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:48,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 09:04:48,331 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:04:48,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:48,332 INFO L85 PathProgramCache]: Analyzing trace with hash -620391795, now seen corresponding path program 1 times [2022-07-21 09:04:48,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:48,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079456966] [2022-07-21 09:04:48,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:48,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:48,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 09:04:48,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:48,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079456966] [2022-07-21 09:04:48,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079456966] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:48,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040292868] [2022-07-21 09:04:48,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:48,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:48,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:04:48,494 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) [2022-07-21 09:04:48,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:04:48,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:48,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 09:04:48,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:04:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 09:04:48,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:04:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 09:04:49,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040292868] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:49,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:04:49,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-21 09:04:49,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512796075] [2022-07-21 09:04:49,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:49,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:04:49,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:49,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:04:49,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:04:49,178 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 368 [2022-07-21 09:04:49,180 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 347 transitions, 895 flow. Second operand has 7 states, 7 states have (on average 294.0) internal successors, (2058), 7 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:49,180 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:49,180 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 368 [2022-07-21 09:04:49,180 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:50,685 INFO L129 PetriNetUnfolder]: 1271/9246 cut-off events. [2022-07-21 09:04:50,686 INFO L130 PetriNetUnfolder]: For 1679/1919 co-relation queries the response was YES. [2022-07-21 09:04:50,720 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12456 conditions, 9246 events. 1271/9246 cut-off events. For 1679/1919 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 92702 event pairs, 256 based on Foata normal form. 239/8806 useless extension candidates. Maximal degree in co-relation 12443. Up to 1314 conditions per place. [2022-07-21 09:04:50,747 INFO L132 encePairwiseOnDemand]: 352/368 looper letters, 99 selfloop transitions, 17 changer transitions 0/391 dead transitions. [2022-07-21 09:04:50,747 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 391 transitions, 1251 flow [2022-07-21 09:04:50,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:04:50,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 09:04:50,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2402 transitions. [2022-07-21 09:04:50,753 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8158967391304348 [2022-07-21 09:04:50,753 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2402 transitions. [2022-07-21 09:04:50,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2402 transitions. [2022-07-21 09:04:50,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:50,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2402 transitions. [2022-07-21 09:04:50,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 300.25) internal successors, (2402), 8 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:50,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 368.0) internal successors, (3312), 9 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:50,766 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 368.0) internal successors, (3312), 9 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:50,766 INFO L186 Difference]: Start difference. First operand has 351 places, 347 transitions, 895 flow. Second operand 8 states and 2402 transitions. [2022-07-21 09:04:50,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 391 transitions, 1251 flow [2022-07-21 09:04:50,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 391 transitions, 1224 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-21 09:04:50,775 INFO L242 Difference]: Finished difference. Result has 358 places, 357 transitions, 985 flow [2022-07-21 09:04:50,776 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=985, PETRI_PLACES=358, PETRI_TRANSITIONS=357} [2022-07-21 09:04:50,776 INFO L279 CegarLoopForPetriNet]: 335 programPoint places, 23 predicate places. [2022-07-21 09:04:50,777 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 357 transitions, 985 flow [2022-07-21 09:04:50,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 294.0) internal successors, (2058), 7 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:50,778 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:50,778 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:50,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 09:04:51,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:51,002 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:04:51,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:51,002 INFO L85 PathProgramCache]: Analyzing trace with hash -2047508188, now seen corresponding path program 1 times [2022-07-21 09:04:51,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:51,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560160128] [2022-07-21 09:04:51,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:51,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:51,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:51,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:51,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:51,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560160128] [2022-07-21 09:04:51,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560160128] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:04:51,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:04:51,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 09:04:51,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79636452] [2022-07-21 09:04:51,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:51,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:04:51,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:51,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:04:51,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:04:51,111 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 368 [2022-07-21 09:04:51,113 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 357 transitions, 985 flow. Second operand has 7 states, 7 states have (on average 293.14285714285717) internal successors, (2052), 7 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:51,113 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:51,113 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 368 [2022-07-21 09:04:51,114 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:52,174 INFO L129 PetriNetUnfolder]: 927/5714 cut-off events. [2022-07-21 09:04:52,174 INFO L130 PetriNetUnfolder]: For 1754/1799 co-relation queries the response was YES. [2022-07-21 09:04:52,205 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8598 conditions, 5714 events. 927/5714 cut-off events. For 1754/1799 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 49273 event pairs, 655 based on Foata normal form. 65/5343 useless extension candidates. Maximal degree in co-relation 8580. Up to 1322 conditions per place. [2022-07-21 09:04:52,226 INFO L132 encePairwiseOnDemand]: 349/368 looper letters, 56 selfloop transitions, 14 changer transitions 74/415 dead transitions. [2022-07-21 09:04:52,226 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 415 transitions, 1426 flow [2022-07-21 09:04:52,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:04:52,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-21 09:04:52,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3293 transitions. [2022-07-21 09:04:52,235 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8134881422924901 [2022-07-21 09:04:52,236 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3293 transitions. [2022-07-21 09:04:52,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3293 transitions. [2022-07-21 09:04:52,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:52,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3293 transitions. [2022-07-21 09:04:52,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 299.3636363636364) internal successors, (3293), 11 states have internal predecessors, (3293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:52,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 368.0) internal successors, (4416), 12 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:52,255 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 368.0) internal successors, (4416), 12 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:52,255 INFO L186 Difference]: Start difference. First operand has 358 places, 357 transitions, 985 flow. Second operand 11 states and 3293 transitions. [2022-07-21 09:04:52,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 415 transitions, 1426 flow [2022-07-21 09:04:52,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 415 transitions, 1425 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 09:04:52,266 INFO L242 Difference]: Finished difference. Result has 370 places, 333 transitions, 849 flow [2022-07-21 09:04:52,267 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=849, PETRI_PLACES=370, PETRI_TRANSITIONS=333} [2022-07-21 09:04:52,269 INFO L279 CegarLoopForPetriNet]: 335 programPoint places, 35 predicate places. [2022-07-21 09:04:52,269 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 333 transitions, 849 flow [2022-07-21 09:04:52,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 293.14285714285717) internal successors, (2052), 7 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:52,271 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:52,271 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:52,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 09:04:52,272 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:04:52,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:52,272 INFO L85 PathProgramCache]: Analyzing trace with hash -335567163, now seen corresponding path program 1 times [2022-07-21 09:04:52,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:52,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621542100] [2022-07-21 09:04:52,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:52,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:52,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 09:04:52,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:52,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621542100] [2022-07-21 09:04:52,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621542100] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:52,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305938162] [2022-07-21 09:04:52,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:52,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:52,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:04:52,386 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) [2022-07-21 09:04:52,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:04:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:52,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 09:04:52,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:04:52,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 09:04:52,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:04:52,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 09:04:52,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305938162] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:52,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:04:52,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-21 09:04:52,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741437495] [2022-07-21 09:04:52,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:52,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:04:52,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:52,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:04:52,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:04:52,966 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 368 [2022-07-21 09:04:52,968 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 333 transitions, 849 flow. Second operand has 7 states, 7 states have (on average 297.0) internal successors, (2079), 7 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:52,968 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:52,968 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 368 [2022-07-21 09:04:52,969 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:53,461 INFO L129 PetriNetUnfolder]: 453/2812 cut-off events. [2022-07-21 09:04:53,461 INFO L130 PetriNetUnfolder]: For 1082/1169 co-relation queries the response was YES. [2022-07-21 09:04:53,482 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4391 conditions, 2812 events. 453/2812 cut-off events. For 1082/1169 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 18251 event pairs, 74 based on Foata normal form. 113/2634 useless extension candidates. Maximal degree in co-relation 4369. Up to 401 conditions per place. [2022-07-21 09:04:53,496 INFO L132 encePairwiseOnDemand]: 360/368 looper letters, 60 selfloop transitions, 7 changer transitions 0/341 dead transitions. [2022-07-21 09:04:53,496 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 341 transitions, 1021 flow [2022-07-21 09:04:53,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:04:53,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:04:53,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2093 transitions. [2022-07-21 09:04:53,502 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8125 [2022-07-21 09:04:53,502 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2093 transitions. [2022-07-21 09:04:53,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2093 transitions. [2022-07-21 09:04:53,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:53,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2093 transitions. [2022-07-21 09:04:53,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 299.0) internal successors, (2093), 7 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:53,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 368.0) internal successors, (2944), 8 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:53,512 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 368.0) internal successors, (2944), 8 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:53,513 INFO L186 Difference]: Start difference. First operand has 370 places, 333 transitions, 849 flow. Second operand 7 states and 2093 transitions. [2022-07-21 09:04:53,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 341 transitions, 1021 flow [2022-07-21 09:04:53,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 341 transitions, 910 flow, removed 21 selfloop flow, removed 22 redundant places. [2022-07-21 09:04:53,522 INFO L242 Difference]: Finished difference. Result has 342 places, 334 transitions, 778 flow [2022-07-21 09:04:53,522 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=778, PETRI_PLACES=342, PETRI_TRANSITIONS=334} [2022-07-21 09:04:53,523 INFO L279 CegarLoopForPetriNet]: 335 programPoint places, 7 predicate places. [2022-07-21 09:04:53,523 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 334 transitions, 778 flow [2022-07-21 09:04:53,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 297.0) internal successors, (2079), 7 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:53,524 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:53,524 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:53,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 09:04:53,751 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,SelfDestructingSolverStorable6 [2022-07-21 09:04:53,752 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:04:53,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:53,753 INFO L85 PathProgramCache]: Analyzing trace with hash 371551471, now seen corresponding path program 1 times [2022-07-21 09:04:53,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:53,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911732504] [2022-07-21 09:04:53,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:53,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:53,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:53,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 09:04:53,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:53,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911732504] [2022-07-21 09:04:53,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911732504] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:53,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619402590] [2022-07-21 09:04:53,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:53,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:53,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:04:53,910 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) [2022-07-21 09:04:53,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:04:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:54,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 09:04:54,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:04:54,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 09:04:54,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:04:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 09:04:54,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619402590] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:54,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:04:54,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-21 09:04:54,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965999146] [2022-07-21 09:04:54,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:54,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:04:54,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:54,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:04:54,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:04:54,760 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 368 [2022-07-21 09:04:54,761 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 334 transitions, 778 flow. Second operand has 7 states, 7 states have (on average 297.14285714285717) internal successors, (2080), 7 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:54,761 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:54,762 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 368 [2022-07-21 09:04:54,762 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:55,188 INFO L129 PetriNetUnfolder]: 357/3660 cut-off events. [2022-07-21 09:04:55,189 INFO L130 PetriNetUnfolder]: For 538/710 co-relation queries the response was YES. [2022-07-21 09:04:55,211 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4811 conditions, 3660 events. 357/3660 cut-off events. For 538/710 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 29301 event pairs, 133 based on Foata normal form. 171/3541 useless extension candidates. Maximal degree in co-relation 4799. Up to 330 conditions per place. [2022-07-21 09:04:55,222 INFO L132 encePairwiseOnDemand]: 360/368 looper letters, 62 selfloop transitions, 7 changer transitions 0/343 dead transitions. [2022-07-21 09:04:55,222 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 343 transitions, 951 flow [2022-07-21 09:04:55,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:04:55,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:04:55,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2093 transitions. [2022-07-21 09:04:55,227 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8125 [2022-07-21 09:04:55,227 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2093 transitions. [2022-07-21 09:04:55,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2093 transitions. [2022-07-21 09:04:55,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:55,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2093 transitions. [2022-07-21 09:04:55,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 299.0) internal successors, (2093), 7 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:55,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 368.0) internal successors, (2944), 8 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:55,236 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 368.0) internal successors, (2944), 8 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:55,236 INFO L186 Difference]: Start difference. First operand has 342 places, 334 transitions, 778 flow. Second operand 7 states and 2093 transitions. [2022-07-21 09:04:55,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 343 transitions, 951 flow [2022-07-21 09:04:55,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 343 transitions, 940 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-21 09:04:55,244 INFO L242 Difference]: Finished difference. Result has 345 places, 335 transitions, 795 flow [2022-07-21 09:04:55,244 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=795, PETRI_PLACES=345, PETRI_TRANSITIONS=335} [2022-07-21 09:04:55,245 INFO L279 CegarLoopForPetriNet]: 335 programPoint places, 10 predicate places. [2022-07-21 09:04:55,245 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 335 transitions, 795 flow [2022-07-21 09:04:55,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 297.14285714285717) internal successors, (2080), 7 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:55,246 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:55,246 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:55,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 09:04:55,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:55,471 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:04:55,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:55,472 INFO L85 PathProgramCache]: Analyzing trace with hash 856971819, now seen corresponding path program 1 times [2022-07-21 09:04:55,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:55,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873817493] [2022-07-21 09:04:55,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:55,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:55,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 09:04:57,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:57,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873817493] [2022-07-21 09:04:57,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873817493] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:57,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932493812] [2022-07-21 09:04:57,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:57,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:57,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:04:57,964 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) [2022-07-21 09:04:57,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:04:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:58,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 156 conjunts are in the unsatisfiable core [2022-07-21 09:04:58,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:04:59,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:04:59,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 09:05:00,481 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 09:05:00,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-21 09:05:00,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:05:01,540 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:05:01,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 09:05:01,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:05:02,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:05:02,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:05:02,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:05:05,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 09:05:05,238 INFO L356 Elim1Store]: treesize reduction 207, result has 21.6 percent of original size [2022-07-21 09:05:05,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 76 [2022-07-21 09:05:07,500 INFO L356 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2022-07-21 09:05:07,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 77 [2022-07-21 09:05:08,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:05:08,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:05:11,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 09:05:12,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:05:12,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932493812] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:05:12,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:05:12,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 74, 50] total 155 [2022-07-21 09:05:12,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735692193] [2022-07-21 09:05:12,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:05:12,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2022-07-21 09:05:12,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:05:12,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2022-07-21 09:05:12,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1061, Invalid=22809, Unknown=0, NotChecked=0, Total=23870 [2022-07-21 09:05:12,578 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 368 [2022-07-21 09:05:12,592 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 335 transitions, 795 flow. Second operand has 155 states, 155 states have (on average 134.29032258064515) internal successors, (20815), 155 states have internal predecessors, (20815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:05:12,592 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:05:12,592 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 368 [2022-07-21 09:05:12,592 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand