./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/test-context1.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/test-context1.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 a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 04:01:50,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 04:01:50,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 04:01:51,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 04:01:51,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 04:01:51,027 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 04:01:51,031 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 04:01:51,034 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 04:01:51,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 04:01:51,040 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 04:01:51,042 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 04:01:51,044 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 04:01:51,044 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 04:01:51,046 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 04:01:51,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 04:01:51,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 04:01:51,053 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 04:01:51,054 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 04:01:51,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 04:01:51,060 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 04:01:51,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 04:01:51,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 04:01:51,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 04:01:51,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 04:01:51,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 04:01:51,076 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 04:01:51,076 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 04:01:51,078 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 04:01:51,078 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 04:01:51,079 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 04:01:51,079 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 04:01:51,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 04:01:51,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 04:01:51,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 04:01:51,084 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 04:01:51,085 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 04:01:51,085 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 04:01:51,085 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 04:01:51,086 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 04:01:51,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 04:01:51,087 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 04:01:51,088 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 04:01:51,121 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 04:01:51,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 04:01:51,125 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 04:01:51,126 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 04:01:51,127 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 04:01:51,127 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 04:01:51,127 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 04:01:51,128 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 04:01:51,128 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 04:01:51,128 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 04:01:51,129 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 04:01:51,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 04:01:51,129 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 04:01:51,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 04:01:51,130 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 04:01:51,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 04:01:51,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 04:01:51,130 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 04:01:51,131 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 04:01:51,131 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 04:01:51,131 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 04:01:51,131 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 04:01:51,132 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 04:01:51,132 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 04:01:51,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 04:01:51,132 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 04:01:51,133 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 04:01:51,133 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 04:01:51,133 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 04:01:51,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 04:01:51,134 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 04:01:51,134 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 04:01:51,134 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 04:01:51,134 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 04:01:51,135 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 04:01:51,135 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 04:01:51,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 04:01:51,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 04:01:51,476 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 04:01:51,477 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 04:01:51,478 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 04:01:51,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-context1.wvr.c [2023-08-31 04:01:52,563 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 04:01:53,169 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 04:01:53,170 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c [2023-08-31 04:01:53,177 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92cc9c786/c871d099963f4eb990da6808c274aab3/FLAG2e827ec2e [2023-08-31 04:01:53,199 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92cc9c786/c871d099963f4eb990da6808c274aab3 [2023-08-31 04:01:53,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 04:01:53,204 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 04:01:53,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 04:01:53,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 04:01:53,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 04:01:53,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 04:01:53" (1/1) ... [2023-08-31 04:01:53,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d3b5b68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:01:53, skipping insertion in model container [2023-08-31 04:01:53,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 04:01:53" (1/1) ... [2023-08-31 04:01:53,218 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 04:01:53,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 04:01:53,408 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c[2433,2446] [2023-08-31 04:01:53,420 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 04:01:53,430 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 04:01:53,460 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c[2433,2446] [2023-08-31 04:01:53,468 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 04:01:53,477 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 04:01:53,478 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 04:01:53,483 INFO L208 MainTranslator]: Completed translation [2023-08-31 04:01:53,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:01:53 WrapperNode [2023-08-31 04:01:53,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 04:01:53,487 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 04:01:53,487 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 04:01:53,488 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 04:01:53,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:01:53" (1/1) ... [2023-08-31 04:01:53,509 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:01:53" (1/1) ... [2023-08-31 04:01:53,556 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 135 [2023-08-31 04:01:53,557 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 04:01:53,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 04:01:53,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 04:01:53,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 04:01:53,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:01:53" (1/1) ... [2023-08-31 04:01:53,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:01:53" (1/1) ... [2023-08-31 04:01:53,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:01:53" (1/1) ... [2023-08-31 04:01:53,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:01:53" (1/1) ... [2023-08-31 04:01:53,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:01:53" (1/1) ... [2023-08-31 04:01:53,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:01:53" (1/1) ... [2023-08-31 04:01:53,612 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:01:53" (1/1) ... [2023-08-31 04:01:53,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:01:53" (1/1) ... [2023-08-31 04:01:53,615 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 04:01:53,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 04:01:53,616 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 04:01:53,616 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 04:01:53,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:01:53" (1/1) ... [2023-08-31 04:01:53,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 04:01:53,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:01:53,654 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 04:01:53,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 04:01:53,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 04:01:53,706 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 04:01:53,706 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 04:01:53,706 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 04:01:53,707 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 04:01:53,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 04:01:53,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 04:01:53,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 04:01:53,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 04:01:53,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 04:01:53,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 04:01:53,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 04:01:53,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 04:01:53,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 04:01:53,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 04:01:53,709 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 04:01:53,819 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 04:01:53,821 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 04:01:54,093 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 04:01:54,216 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 04:01:54,220 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-31 04:01:54,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 04:01:54 BoogieIcfgContainer [2023-08-31 04:01:54,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 04:01:54,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 04:01:54,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 04:01:54,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 04:01:54,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 04:01:53" (1/3) ... [2023-08-31 04:01:54,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@238d8fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 04:01:54, skipping insertion in model container [2023-08-31 04:01:54,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:01:53" (2/3) ... [2023-08-31 04:01:54,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@238d8fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 04:01:54, skipping insertion in model container [2023-08-31 04:01:54,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 04:01:54" (3/3) ... [2023-08-31 04:01:54,229 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2023-08-31 04:01:54,236 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 04:01:54,244 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 04:01:54,245 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 04:01:54,245 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 04:01:54,324 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 04:01:54,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 110 transitions, 236 flow [2023-08-31 04:01:54,450 INFO L130 PetriNetUnfolder]: 9/108 cut-off events. [2023-08-31 04:01:54,451 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:01:54,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 108 events. 9/108 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 76. Up to 2 conditions per place. [2023-08-31 04:01:54,456 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 110 transitions, 236 flow [2023-08-31 04:01:54,461 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 100 transitions, 212 flow [2023-08-31 04:01:54,464 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 04:01:54,479 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 100 transitions, 212 flow [2023-08-31 04:01:54,483 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 100 transitions, 212 flow [2023-08-31 04:01:54,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 100 transitions, 212 flow [2023-08-31 04:01:54,524 INFO L130 PetriNetUnfolder]: 9/100 cut-off events. [2023-08-31 04:01:54,524 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:01:54,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 100 events. 9/100 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 76. Up to 2 conditions per place. [2023-08-31 04:01:54,527 INFO L119 LiptonReduction]: Number of co-enabled transitions 432 [2023-08-31 04:01:57,867 INFO L134 LiptonReduction]: Checked pairs total: 513 [2023-08-31 04:01:57,868 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-08-31 04:01:57,880 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 04:01:57,886 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4efee644, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 04:01:57,886 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-31 04:01:57,891 INFO L130 PetriNetUnfolder]: 3/14 cut-off events. [2023-08-31 04:01:57,891 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:01:57,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:01:57,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:01:57,893 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:01:57,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:01:57,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1991554592, now seen corresponding path program 1 times [2023-08-31 04:01:57,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:01:57,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844085835] [2023-08-31 04:01:57,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:01:57,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:01:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:01:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:01:58,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:01:58,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844085835] [2023-08-31 04:01:58,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844085835] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:01:58,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:01:58,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 04:01:58,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535312530] [2023-08-31 04:01:58,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:01:58,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 04:01:58,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:01:58,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 04:01:58,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 04:01:58,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 211 [2023-08-31 04:01:58,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:01:58,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:01:58,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 211 [2023-08-31 04:01:58,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:01:58,641 INFO L130 PetriNetUnfolder]: 59/111 cut-off events. [2023-08-31 04:01:58,642 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-31 04:01:58,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 111 events. 59/111 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 267 event pairs, 18 based on Foata normal form. 2/77 useless extension candidates. Maximal degree in co-relation 100. Up to 43 conditions per place. [2023-08-31 04:01:58,644 INFO L137 encePairwiseOnDemand]: 207/211 looper letters, 28 selfloop transitions, 4 changer transitions 4/36 dead transitions. [2023-08-31 04:01:58,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 36 transitions, 174 flow [2023-08-31 04:01:58,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 04:01:58,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 04:01:58,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 402 transitions. [2023-08-31 04:01:58,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.476303317535545 [2023-08-31 04:01:58,667 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 402 transitions. [2023-08-31 04:01:58,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 402 transitions. [2023-08-31 04:01:58,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:01:58,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 402 transitions. [2023-08-31 04:01:58,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:01:58,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:01:58,684 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:01:58,685 INFO L175 Difference]: Start difference. First operand has 19 places, 15 transitions, 42 flow. Second operand 4 states and 402 transitions. [2023-08-31 04:01:58,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 36 transitions, 174 flow [2023-08-31 04:01:58,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 36 transitions, 154 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 04:01:58,691 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 61 flow [2023-08-31 04:01:58,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=61, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-08-31 04:01:58,696 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 1 predicate places. [2023-08-31 04:01:58,696 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 61 flow [2023-08-31 04:01:58,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:01:58,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:01:58,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:01:58,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 04:01:58,701 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:01:58,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:01:58,703 INFO L85 PathProgramCache]: Analyzing trace with hash 220979605, now seen corresponding path program 1 times [2023-08-31 04:01:58,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:01:58,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682535109] [2023-08-31 04:01:58,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:01:58,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:01:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:01:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:01:58,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:01:58,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682535109] [2023-08-31 04:01:58,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682535109] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:01:58,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:01:58,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 04:01:58,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724117402] [2023-08-31 04:01:58,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:01:58,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 04:01:58,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:01:58,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 04:01:58,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 04:01:58,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-08-31 04:01:58,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:01:58,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:01:58,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-08-31 04:01:58,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:01:58,864 INFO L130 PetriNetUnfolder]: 87/173 cut-off events. [2023-08-31 04:01:58,864 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-31 04:01:58,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 173 events. 87/173 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 566 event pairs, 26 based on Foata normal form. 12/157 useless extension candidates. Maximal degree in co-relation 224. Up to 117 conditions per place. [2023-08-31 04:01:58,866 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 20 selfloop transitions, 2 changer transitions 5/27 dead transitions. [2023-08-31 04:01:58,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 27 transitions, 136 flow [2023-08-31 04:01:58,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 04:01:58,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 04:01:58,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 313 transitions. [2023-08-31 04:01:58,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49447077409162715 [2023-08-31 04:01:58,868 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 313 transitions. [2023-08-31 04:01:58,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 313 transitions. [2023-08-31 04:01:58,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:01:58,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 313 transitions. [2023-08-31 04:01:58,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:01:58,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:01:58,872 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:01:58,872 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 61 flow. Second operand 3 states and 313 transitions. [2023-08-31 04:01:58,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 27 transitions, 136 flow [2023-08-31 04:01:58,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 27 transitions, 136 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 04:01:58,874 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 75 flow [2023-08-31 04:01:58,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-08-31 04:01:58,875 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 4 predicate places. [2023-08-31 04:01:58,876 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 75 flow [2023-08-31 04:01:58,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:01:58,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:01:58,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:01:58,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 04:01:58,877 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:01:58,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:01:58,879 INFO L85 PathProgramCache]: Analyzing trace with hash 2120815196, now seen corresponding path program 1 times [2023-08-31 04:01:58,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:01:58,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054638917] [2023-08-31 04:01:58,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:01:58,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:01:58,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:01:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:01:59,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:01:59,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054638917] [2023-08-31 04:01:59,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054638917] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:01:59,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:01:59,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 04:01:59,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798899335] [2023-08-31 04:01:59,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:01:59,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 04:01:59,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:01:59,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 04:01:59,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 04:01:59,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 211 [2023-08-31 04:01:59,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:01:59,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:01:59,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 211 [2023-08-31 04:01:59,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:01:59,152 INFO L130 PetriNetUnfolder]: 61/130 cut-off events. [2023-08-31 04:01:59,152 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2023-08-31 04:01:59,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 130 events. 61/130 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 355 event pairs, 44 based on Foata normal form. 6/136 useless extension candidates. Maximal degree in co-relation 249. Up to 103 conditions per place. [2023-08-31 04:01:59,153 INFO L137 encePairwiseOnDemand]: 207/211 looper letters, 16 selfloop transitions, 2 changer transitions 10/28 dead transitions. [2023-08-31 04:01:59,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 28 transitions, 148 flow [2023-08-31 04:01:59,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 04:01:59,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 04:01:59,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 387 transitions. [2023-08-31 04:01:59,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585308056872038 [2023-08-31 04:01:59,156 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 387 transitions. [2023-08-31 04:01:59,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 387 transitions. [2023-08-31 04:01:59,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:01:59,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 387 transitions. [2023-08-31 04:01:59,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 96.75) internal successors, (387), 4 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:01:59,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:01:59,160 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:01:59,160 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 75 flow. Second operand 4 states and 387 transitions. [2023-08-31 04:01:59,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 28 transitions, 148 flow [2023-08-31 04:01:59,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 28 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 04:01:59,162 INFO L231 Difference]: Finished difference. Result has 27 places, 18 transitions, 76 flow [2023-08-31 04:01:59,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=76, PETRI_PLACES=27, PETRI_TRANSITIONS=18} [2023-08-31 04:01:59,163 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 8 predicate places. [2023-08-31 04:01:59,163 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 18 transitions, 76 flow [2023-08-31 04:01:59,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:01:59,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:01:59,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:01:59,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 04:01:59,164 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:01:59,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:01:59,165 INFO L85 PathProgramCache]: Analyzing trace with hash 2067904534, now seen corresponding path program 1 times [2023-08-31 04:01:59,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:01:59,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203074520] [2023-08-31 04:01:59,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:01:59,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:01:59,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:01:59,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:01:59,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:01:59,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203074520] [2023-08-31 04:01:59,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203074520] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:01:59,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999648252] [2023-08-31 04:01:59,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:01:59,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:01:59,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:01:59,413 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:01:59,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 04:01:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:01:59,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-31 04:01:59,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:01:59,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-31 04:01:59,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 04:01:59,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 04:01:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:01:59,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:01:59,984 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_72) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse1 (* c_~front~0 4))) (or (not (= 5 (select .cse0 (+ (* c_~size~0 4) .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (= 5 (select .cse0 (+ .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))))) is different from false [2023-08-31 04:01:59,998 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:01:59,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2023-08-31 04:02:00,012 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 04:02:00,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 324 treesize of output 289 [2023-08-31 04:02:00,036 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 04:02:00,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 86 [2023-08-31 04:02:00,048 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 04:02:00,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 67 [2023-08-31 04:02:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-31 04:02:00,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999648252] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:02:00,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:02:00,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 12 [2023-08-31 04:02:00,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906075363] [2023-08-31 04:02:00,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:02:00,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 04:02:00,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:02:00,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 04:02:00,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=104, Unknown=7, NotChecked=22, Total=182 [2023-08-31 04:02:00,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 211 [2023-08-31 04:02:00,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 76 flow. Second operand has 14 states, 14 states have (on average 70.14285714285714) internal successors, (982), 14 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:00,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:02:00,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 211 [2023-08-31 04:02:00,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:02:00,193 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_73 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) c_~queue~0.base)) (.cse1 (* c_~front~0 4))) (or (not (= 5 (select .cse0 (+ (* c_~size~0 4) c_~queue~0.offset .cse1)))) (= 5 (select .cse0 (+ c_~queue~0.offset .cse1)))))) (= c_~queue~0.offset 0) (= 5 c_~x~0) (= c_~front~0 0) (= 5 (select (select |c_#memory_int| c_~queue~0.base) 0))) is different from false [2023-08-31 04:02:00,362 INFO L130 PetriNetUnfolder]: 136/258 cut-off events. [2023-08-31 04:02:00,362 INFO L131 PetriNetUnfolder]: For 104/104 co-relation queries the response was YES. [2023-08-31 04:02:00,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 258 events. 136/258 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 962 event pairs, 21 based on Foata normal form. 1/259 useless extension candidates. Maximal degree in co-relation 665. Up to 79 conditions per place. [2023-08-31 04:02:00,367 INFO L137 encePairwiseOnDemand]: 201/211 looper letters, 39 selfloop transitions, 16 changer transitions 14/69 dead transitions. [2023-08-31 04:02:00,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 69 transitions, 363 flow [2023-08-31 04:02:00,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 04:02:00,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 04:02:00,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 681 transitions. [2023-08-31 04:02:00,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.358609794628752 [2023-08-31 04:02:00,369 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 681 transitions. [2023-08-31 04:02:00,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 681 transitions. [2023-08-31 04:02:00,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:02:00,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 681 transitions. [2023-08-31 04:02:00,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 75.66666666666667) internal successors, (681), 9 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:00,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:00,376 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:00,376 INFO L175 Difference]: Start difference. First operand has 27 places, 18 transitions, 76 flow. Second operand 9 states and 681 transitions. [2023-08-31 04:02:00,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 69 transitions, 363 flow [2023-08-31 04:02:00,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 69 transitions, 353 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-31 04:02:00,380 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 185 flow [2023-08-31 04:02:00,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=185, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-08-31 04:02:00,382 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 15 predicate places. [2023-08-31 04:02:00,382 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 185 flow [2023-08-31 04:02:00,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.14285714285714) internal successors, (982), 14 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:00,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:02:00,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:02:00,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 04:02:00,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:02:00,589 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:02:00,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:02:00,590 INFO L85 PathProgramCache]: Analyzing trace with hash -2125347476, now seen corresponding path program 2 times [2023-08-31 04:02:00,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:02:00,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296198457] [2023-08-31 04:02:00,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:02:00,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:02:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:02:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:02:00,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:02:00,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296198457] [2023-08-31 04:02:00,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296198457] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:02:00,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043854493] [2023-08-31 04:02:00,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:02:00,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:02:00,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:02:00,919 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:02:00,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 04:02:01,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:02:01,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:02:01,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-31 04:02:01,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:02:01,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:02:01,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-31 04:02:01,170 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 04:02:01,172 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:02:01,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-08-31 04:02:01,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:02:01,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:02:01,210 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_104 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_104) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2023-08-31 04:02:01,221 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:02:01,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2023-08-31 04:02:01,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-08-31 04:02:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:02:01,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043854493] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:02:01,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:02:01,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-31 04:02:01,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235676856] [2023-08-31 04:02:01,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:02:01,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 04:02:01,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:02:01,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 04:02:01,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=122, Unknown=1, NotChecked=22, Total=182 [2023-08-31 04:02:01,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 211 [2023-08-31 04:02:01,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 185 flow. Second operand has 14 states, 14 states have (on average 78.35714285714286) internal successors, (1097), 14 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:01,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:02:01,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 211 [2023-08-31 04:02:01,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:02:01,404 INFO L130 PetriNetUnfolder]: 148/276 cut-off events. [2023-08-31 04:02:01,405 INFO L131 PetriNetUnfolder]: For 280/280 co-relation queries the response was YES. [2023-08-31 04:02:01,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 276 events. 148/276 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1026 event pairs, 21 based on Foata normal form. 1/277 useless extension candidates. Maximal degree in co-relation 992. Up to 173 conditions per place. [2023-08-31 04:02:01,406 INFO L137 encePairwiseOnDemand]: 207/211 looper letters, 35 selfloop transitions, 9 changer transitions 9/53 dead transitions. [2023-08-31 04:02:01,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 53 transitions, 378 flow [2023-08-31 04:02:01,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 04:02:01,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 04:02:01,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 421 transitions. [2023-08-31 04:02:01,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3990521327014218 [2023-08-31 04:02:01,408 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 421 transitions. [2023-08-31 04:02:01,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 421 transitions. [2023-08-31 04:02:01,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:02:01,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 421 transitions. [2023-08-31 04:02:01,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 84.2) internal successors, (421), 5 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:01,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:01,412 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:01,412 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 185 flow. Second operand 5 states and 421 transitions. [2023-08-31 04:02:01,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 53 transitions, 378 flow [2023-08-31 04:02:01,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 53 transitions, 362 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-31 04:02:01,415 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 204 flow [2023-08-31 04:02:01,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-08-31 04:02:01,416 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 18 predicate places. [2023-08-31 04:02:01,416 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 204 flow [2023-08-31 04:02:01,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 78.35714285714286) internal successors, (1097), 14 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:01,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:02:01,417 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:02:01,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 04:02:01,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:02:01,629 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:02:01,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:02:01,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1479539105, now seen corresponding path program 3 times [2023-08-31 04:02:01,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:02:01,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860263911] [2023-08-31 04:02:01,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:02:01,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:02:01,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:02:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:02:01,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:02:01,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860263911] [2023-08-31 04:02:01,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860263911] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:02:01,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320400306] [2023-08-31 04:02:01,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:02:01,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:02:01,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:02:01,696 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:02:01,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 04:02:01,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 04:02:01,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:02:01,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 04:02:01,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:02:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:02:01,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:02:01,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:02:01,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320400306] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:02:01,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:02:01,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-31 04:02:01,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226635175] [2023-08-31 04:02:01,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:02:01,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 04:02:01,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:02:01,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 04:02:01,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 04:02:01,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-08-31 04:02:01,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 204 flow. Second operand has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:01,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:02:01,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-08-31 04:02:01,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:02:01,926 INFO L130 PetriNetUnfolder]: 248/479 cut-off events. [2023-08-31 04:02:01,926 INFO L131 PetriNetUnfolder]: For 941/941 co-relation queries the response was YES. [2023-08-31 04:02:01,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1767 conditions, 479 events. 248/479 cut-off events. For 941/941 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2155 event pairs, 80 based on Foata normal form. 18/497 useless extension candidates. Maximal degree in co-relation 1742. Up to 306 conditions per place. [2023-08-31 04:02:01,929 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 40 selfloop transitions, 12 changer transitions 3/55 dead transitions. [2023-08-31 04:02:01,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 446 flow [2023-08-31 04:02:01,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 04:02:01,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 04:02:01,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 421 transitions. [2023-08-31 04:02:01,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49881516587677727 [2023-08-31 04:02:01,931 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 421 transitions. [2023-08-31 04:02:01,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 421 transitions. [2023-08-31 04:02:01,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:02:01,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 421 transitions. [2023-08-31 04:02:01,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:01,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:01,934 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:01,934 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 204 flow. Second operand 4 states and 421 transitions. [2023-08-31 04:02:01,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 446 flow [2023-08-31 04:02:01,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 55 transitions, 417 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-31 04:02:01,940 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 287 flow [2023-08-31 04:02:01,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=287, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2023-08-31 04:02:01,942 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 20 predicate places. [2023-08-31 04:02:01,943 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 287 flow [2023-08-31 04:02:01,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:01,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:02:01,943 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:02:01,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 04:02:02,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:02:02,150 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:02:02,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:02:02,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1493740304, now seen corresponding path program 4 times [2023-08-31 04:02:02,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:02:02,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962925567] [2023-08-31 04:02:02,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:02:02,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:02:02,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:02:02,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:02:02,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:02:02,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962925567] [2023-08-31 04:02:02,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962925567] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:02:02,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37201951] [2023-08-31 04:02:02,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:02:02,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:02:02,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:02:02,343 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:02:02,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 04:02:02,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:02:02,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:02:02,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 04:02:02,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:02:02,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:02:02,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:02:02,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:02:02,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37201951] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:02:02,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:02:02,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-08-31 04:02:02,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315474950] [2023-08-31 04:02:02,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:02:02,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 04:02:02,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:02:02,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 04:02:02,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-08-31 04:02:02,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 211 [2023-08-31 04:02:02,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 287 flow. Second operand has 14 states, 14 states have (on average 89.64285714285714) internal successors, (1255), 14 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:02,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:02:02,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 211 [2023-08-31 04:02:02,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:02:03,009 INFO L130 PetriNetUnfolder]: 288/586 cut-off events. [2023-08-31 04:02:03,009 INFO L131 PetriNetUnfolder]: For 1450/1450 co-relation queries the response was YES. [2023-08-31 04:02:03,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2340 conditions, 586 events. 288/586 cut-off events. For 1450/1450 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2921 event pairs, 166 based on Foata normal form. 23/609 useless extension candidates. Maximal degree in co-relation 1829. Up to 455 conditions per place. [2023-08-31 04:02:03,012 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 34 selfloop transitions, 3 changer transitions 30/67 dead transitions. [2023-08-31 04:02:03,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 67 transitions, 579 flow [2023-08-31 04:02:03,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 04:02:03,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 04:02:03,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 654 transitions. [2023-08-31 04:02:03,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44278943805010157 [2023-08-31 04:02:03,015 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 654 transitions. [2023-08-31 04:02:03,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 654 transitions. [2023-08-31 04:02:03,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:02:03,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 654 transitions. [2023-08-31 04:02:03,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 93.42857142857143) internal successors, (654), 7 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:03,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:03,019 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:03,020 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 287 flow. Second operand 7 states and 654 transitions. [2023-08-31 04:02:03,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 67 transitions, 579 flow [2023-08-31 04:02:03,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 67 transitions, 569 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-31 04:02:03,024 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 311 flow [2023-08-31 04:02:03,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=311, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2023-08-31 04:02:03,025 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 30 predicate places. [2023-08-31 04:02:03,025 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 311 flow [2023-08-31 04:02:03,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 89.64285714285714) internal successors, (1255), 14 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:03,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:02:03,026 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:02:03,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 04:02:03,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:02:03,232 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:02:03,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:02:03,233 INFO L85 PathProgramCache]: Analyzing trace with hash 88962534, now seen corresponding path program 5 times [2023-08-31 04:02:03,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:02:03,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669380976] [2023-08-31 04:02:03,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:02:03,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:02:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:02:03,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:02:03,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:02:03,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669380976] [2023-08-31 04:02:03,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669380976] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:02:03,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698362850] [2023-08-31 04:02:03,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:02:03,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:02:03,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:02:03,537 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:02:03,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 04:02:03,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:02:03,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:02:03,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-31 04:02:03,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:02:03,833 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 04:02:03,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2023-08-31 04:02:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:02:03,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:02:03,884 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 04:02:03,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2023-08-31 04:02:03,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:02:03,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698362850] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:02:03,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:02:03,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 15 [2023-08-31 04:02:03,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535663288] [2023-08-31 04:02:03,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:02:03,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 04:02:03,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:02:03,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 04:02:03,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-08-31 04:02:04,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 211 [2023-08-31 04:02:04,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 311 flow. Second operand has 17 states, 17 states have (on average 86.58823529411765) internal successors, (1472), 17 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:04,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:02:04,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 211 [2023-08-31 04:02:04,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:02:04,781 INFO L130 PetriNetUnfolder]: 350/661 cut-off events. [2023-08-31 04:02:04,781 INFO L131 PetriNetUnfolder]: For 1370/1370 co-relation queries the response was YES. [2023-08-31 04:02:04,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2649 conditions, 661 events. 350/661 cut-off events. For 1370/1370 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3189 event pairs, 30 based on Foata normal form. 5/666 useless extension candidates. Maximal degree in co-relation 2614. Up to 422 conditions per place. [2023-08-31 04:02:04,785 INFO L137 encePairwiseOnDemand]: 205/211 looper letters, 69 selfloop transitions, 29 changer transitions 51/149 dead transitions. [2023-08-31 04:02:04,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 149 transitions, 1101 flow [2023-08-31 04:02:04,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 04:02:04,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 04:02:04,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1657 transitions. [2023-08-31 04:02:04,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43628225381779884 [2023-08-31 04:02:04,791 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1657 transitions. [2023-08-31 04:02:04,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1657 transitions. [2023-08-31 04:02:04,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:02:04,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1657 transitions. [2023-08-31 04:02:04,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 92.05555555555556) internal successors, (1657), 18 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:04,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 211.0) internal successors, (4009), 19 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:04,802 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 211.0) internal successors, (4009), 19 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:04,802 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 311 flow. Second operand 18 states and 1657 transitions. [2023-08-31 04:02:04,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 149 transitions, 1101 flow [2023-08-31 04:02:04,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 149 transitions, 1071 flow, removed 13 selfloop flow, removed 5 redundant places. [2023-08-31 04:02:04,811 INFO L231 Difference]: Finished difference. Result has 64 places, 47 transitions, 486 flow [2023-08-31 04:02:04,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=486, PETRI_PLACES=64, PETRI_TRANSITIONS=47} [2023-08-31 04:02:04,813 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 45 predicate places. [2023-08-31 04:02:04,813 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 47 transitions, 486 flow [2023-08-31 04:02:04,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 86.58823529411765) internal successors, (1472), 17 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:04,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:02:04,814 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:02:04,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 04:02:05,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:02:05,020 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:02:05,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:02:05,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1904152626, now seen corresponding path program 6 times [2023-08-31 04:02:05,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:02:05,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102613481] [2023-08-31 04:02:05,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:02:05,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:02:05,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:02:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:02:05,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:02:05,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102613481] [2023-08-31 04:02:05,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102613481] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:02:05,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317309655] [2023-08-31 04:02:05,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:02:05,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:02:05,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:02:05,449 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:02:05,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 04:02:05,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 04:02:05,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:02:05,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-31 04:02:05,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:02:05,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:02:05,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-31 04:02:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:02:05,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:02:05,795 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:02:05,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 35 [2023-08-31 04:02:05,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-08-31 04:02:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:02:05,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317309655] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:02:05,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:02:05,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-31 04:02:05,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022498088] [2023-08-31 04:02:05,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:02:05,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 04:02:05,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:02:05,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 04:02:05,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=358, Unknown=3, NotChecked=0, Total=420 [2023-08-31 04:02:06,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 211 [2023-08-31 04:02:06,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 47 transitions, 486 flow. Second operand has 21 states, 21 states have (on average 84.14285714285714) internal successors, (1767), 21 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:06,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:02:06,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 211 [2023-08-31 04:02:06,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:02:06,489 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_~front~0 4))) (and (= (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset .cse0)) 5) (= 5 c_~x~0) (forall ((v_ArrVal_233 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_233) c_~queue~0.base) (+ c_~queue~0.offset .cse0 4)) 5)))) is different from false [2023-08-31 04:02:06,722 INFO L130 PetriNetUnfolder]: 486/934 cut-off events. [2023-08-31 04:02:06,722 INFO L131 PetriNetUnfolder]: For 2844/2844 co-relation queries the response was YES. [2023-08-31 04:02:06,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3923 conditions, 934 events. 486/934 cut-off events. For 2844/2844 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4929 event pairs, 52 based on Foata normal form. 1/935 useless extension candidates. Maximal degree in co-relation 3885. Up to 583 conditions per place. [2023-08-31 04:02:06,728 INFO L137 encePairwiseOnDemand]: 204/211 looper letters, 63 selfloop transitions, 38 changer transitions 35/136 dead transitions. [2023-08-31 04:02:06,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 136 transitions, 1230 flow [2023-08-31 04:02:06,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 04:02:06,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 04:02:06,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1256 transitions. [2023-08-31 04:02:06,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42518618821936355 [2023-08-31 04:02:06,732 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1256 transitions. [2023-08-31 04:02:06,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1256 transitions. [2023-08-31 04:02:06,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:02:06,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1256 transitions. [2023-08-31 04:02:06,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 89.71428571428571) internal successors, (1256), 14 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:06,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 211.0) internal successors, (3165), 15 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:06,741 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 211.0) internal successors, (3165), 15 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:06,741 INFO L175 Difference]: Start difference. First operand has 64 places, 47 transitions, 486 flow. Second operand 14 states and 1256 transitions. [2023-08-31 04:02:06,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 136 transitions, 1230 flow [2023-08-31 04:02:06,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 136 transitions, 1054 flow, removed 66 selfloop flow, removed 7 redundant places. [2023-08-31 04:02:06,751 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 621 flow [2023-08-31 04:02:06,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=621, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2023-08-31 04:02:06,753 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 53 predicate places. [2023-08-31 04:02:06,753 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 621 flow [2023-08-31 04:02:06,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 84.14285714285714) internal successors, (1767), 21 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:06,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:02:06,754 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:02:06,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 04:02:06,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:02:06,961 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:02:06,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:02:06,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1205721493, now seen corresponding path program 7 times [2023-08-31 04:02:06,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:02:06,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480932672] [2023-08-31 04:02:06,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:02:06,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:02:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:02:07,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:02:07,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:02:07,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480932672] [2023-08-31 04:02:07,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480932672] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:02:07,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617497366] [2023-08-31 04:02:07,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 04:02:07,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:02:07,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:02:07,076 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:02:07,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 04:02:07,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:02:07,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 04:02:07,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:02:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:02:07,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:02:07,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:02:07,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617497366] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:02:07,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:02:07,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2023-08-31 04:02:07,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744952914] [2023-08-31 04:02:07,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:02:07,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 04:02:07,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:02:07,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 04:02:07,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-31 04:02:07,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-08-31 04:02:07,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 621 flow. Second operand has 6 states, 6 states have (on average 100.33333333333333) internal successors, (602), 6 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:07,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:02:07,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-08-31 04:02:07,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:02:07,438 INFO L130 PetriNetUnfolder]: 840/1596 cut-off events. [2023-08-31 04:02:07,438 INFO L131 PetriNetUnfolder]: For 5254/5254 co-relation queries the response was YES. [2023-08-31 04:02:07,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7271 conditions, 1596 events. 840/1596 cut-off events. For 5254/5254 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9419 event pairs, 161 based on Foata normal form. 18/1614 useless extension candidates. Maximal degree in co-relation 7234. Up to 991 conditions per place. [2023-08-31 04:02:07,449 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 65 selfloop transitions, 45 changer transitions 4/114 dead transitions. [2023-08-31 04:02:07,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 114 transitions, 1310 flow [2023-08-31 04:02:07,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 04:02:07,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 04:02:07,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 528 transitions. [2023-08-31 04:02:07,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.500473933649289 [2023-08-31 04:02:07,452 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 528 transitions. [2023-08-31 04:02:07,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 528 transitions. [2023-08-31 04:02:07,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:02:07,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 528 transitions. [2023-08-31 04:02:07,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 105.6) internal successors, (528), 5 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:07,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:07,456 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:07,456 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 621 flow. Second operand 5 states and 528 transitions. [2023-08-31 04:02:07,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 114 transitions, 1310 flow [2023-08-31 04:02:07,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 114 transitions, 1182 flow, removed 27 selfloop flow, removed 7 redundant places. [2023-08-31 04:02:07,483 INFO L231 Difference]: Finished difference. Result has 70 places, 85 transitions, 915 flow [2023-08-31 04:02:07,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=915, PETRI_PLACES=70, PETRI_TRANSITIONS=85} [2023-08-31 04:02:07,485 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 51 predicate places. [2023-08-31 04:02:07,485 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 85 transitions, 915 flow [2023-08-31 04:02:07,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 100.33333333333333) internal successors, (602), 6 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:07,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:02:07,485 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:02:07,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 04:02:07,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:02:07,691 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:02:07,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:02:07,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1918772906, now seen corresponding path program 8 times [2023-08-31 04:02:07,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:02:07,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044406209] [2023-08-31 04:02:07,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:02:07,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:02:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:02:07,894 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:02:07,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:02:07,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044406209] [2023-08-31 04:02:07,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044406209] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:02:07,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52308621] [2023-08-31 04:02:07,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:02:07,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:02:07,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:02:07,896 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:02:07,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 04:02:07,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:02:07,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:02:07,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 04:02:08,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:02:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:02:08,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:02:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:02:08,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52308621] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:02:08,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:02:08,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-08-31 04:02:08,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102544690] [2023-08-31 04:02:08,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:02:08,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 04:02:08,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:02:08,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 04:02:08,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2023-08-31 04:02:08,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 211 [2023-08-31 04:02:08,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 85 transitions, 915 flow. Second operand has 23 states, 23 states have (on average 88.78260869565217) internal successors, (2042), 23 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:08,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:02:08,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 211 [2023-08-31 04:02:08,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:02:09,083 INFO L130 PetriNetUnfolder]: 1013/1983 cut-off events. [2023-08-31 04:02:09,084 INFO L131 PetriNetUnfolder]: For 6338/6338 co-relation queries the response was YES. [2023-08-31 04:02:09,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9334 conditions, 1983 events. 1013/1983 cut-off events. For 6338/6338 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12659 event pairs, 557 based on Foata normal form. 52/2035 useless extension candidates. Maximal degree in co-relation 8051. Up to 1534 conditions per place. [2023-08-31 04:02:09,095 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 82 selfloop transitions, 4 changer transitions 70/156 dead transitions. [2023-08-31 04:02:09,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 156 transitions, 1700 flow [2023-08-31 04:02:09,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 04:02:09,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 04:02:09,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1123 transitions. [2023-08-31 04:02:09,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44352290679304895 [2023-08-31 04:02:09,100 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1123 transitions. [2023-08-31 04:02:09,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1123 transitions. [2023-08-31 04:02:09,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:02:09,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1123 transitions. [2023-08-31 04:02:09,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 93.58333333333333) internal successors, (1123), 12 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:09,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 211.0) internal successors, (2743), 13 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:09,108 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 211.0) internal successors, (2743), 13 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:09,108 INFO L175 Difference]: Start difference. First operand has 70 places, 85 transitions, 915 flow. Second operand 12 states and 1123 transitions. [2023-08-31 04:02:09,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 156 transitions, 1700 flow [2023-08-31 04:02:09,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 156 transitions, 1621 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-08-31 04:02:09,146 INFO L231 Difference]: Finished difference. Result has 86 places, 86 transitions, 931 flow [2023-08-31 04:02:09,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=863, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=931, PETRI_PLACES=86, PETRI_TRANSITIONS=86} [2023-08-31 04:02:09,147 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 67 predicate places. [2023-08-31 04:02:09,147 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 86 transitions, 931 flow [2023-08-31 04:02:09,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 88.78260869565217) internal successors, (2042), 23 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:09,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:02:09,149 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:02:09,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 04:02:09,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-31 04:02:09,355 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:02:09,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:02:09,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1263742992, now seen corresponding path program 9 times [2023-08-31 04:02:09,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:02:09,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177845103] [2023-08-31 04:02:09,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:02:09,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:02:09,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:02:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:02:09,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:02:09,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177845103] [2023-08-31 04:02:09,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177845103] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:02:09,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45948173] [2023-08-31 04:02:09,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:02:09,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:02:09,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:02:09,859 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:02:09,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 04:02:10,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 04:02:10,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:02:10,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-31 04:02:10,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:02:10,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 04:02:10,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 04:02:10,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 04:02:10,647 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-08-31 04:02:10,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-08-31 04:02:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:02:10,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:02:11,239 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:02:11,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2023-08-31 04:02:11,252 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-31 04:02:11,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 138 [2023-08-31 04:02:11,265 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-31 04:02:11,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 103 [2023-08-31 04:02:11,277 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-31 04:02:11,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 67 [2023-08-31 04:02:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:02:11,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45948173] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:02:11,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:02:11,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2023-08-31 04:02:11,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144810556] [2023-08-31 04:02:11,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:02:11,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-31 04:02:11,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:02:11,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-31 04:02:11,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=783, Unknown=2, NotChecked=0, Total=930 [2023-08-31 04:02:13,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:02:14,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 211 [2023-08-31 04:02:14,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 86 transitions, 931 flow. Second operand has 31 states, 31 states have (on average 62.774193548387096) internal successors, (1946), 31 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:14,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:02:14,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 211 [2023-08-31 04:02:14,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:02:16,725 INFO L130 PetriNetUnfolder]: 1597/3061 cut-off events. [2023-08-31 04:02:16,725 INFO L131 PetriNetUnfolder]: For 9204/9204 co-relation queries the response was YES. [2023-08-31 04:02:16,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14170 conditions, 3061 events. 1597/3061 cut-off events. For 9204/9204 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 20781 event pairs, 93 based on Foata normal form. 67/3128 useless extension candidates. Maximal degree in co-relation 14118. Up to 1891 conditions per place. [2023-08-31 04:02:16,744 INFO L137 encePairwiseOnDemand]: 204/211 looper letters, 95 selfloop transitions, 92 changer transitions 212/399 dead transitions. [2023-08-31 04:02:16,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 399 transitions, 3745 flow [2023-08-31 04:02:16,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-31 04:02:16,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-31 04:02:16,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2757 transitions. [2023-08-31 04:02:16,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32665876777251185 [2023-08-31 04:02:16,751 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2757 transitions. [2023-08-31 04:02:16,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2757 transitions. [2023-08-31 04:02:16,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:02:16,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2757 transitions. [2023-08-31 04:02:16,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 68.925) internal successors, (2757), 40 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:16,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 211.0) internal successors, (8651), 41 states have internal predecessors, (8651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:16,783 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 211.0) internal successors, (8651), 41 states have internal predecessors, (8651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:16,783 INFO L175 Difference]: Start difference. First operand has 86 places, 86 transitions, 931 flow. Second operand 40 states and 2757 transitions. [2023-08-31 04:02:16,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 399 transitions, 3745 flow [2023-08-31 04:02:16,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 399 transitions, 3619 flow, removed 60 selfloop flow, removed 10 redundant places. [2023-08-31 04:02:16,838 INFO L231 Difference]: Finished difference. Result has 118 places, 111 transitions, 1452 flow [2023-08-31 04:02:16,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=1452, PETRI_PLACES=118, PETRI_TRANSITIONS=111} [2023-08-31 04:02:16,838 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 99 predicate places. [2023-08-31 04:02:16,838 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 111 transitions, 1452 flow [2023-08-31 04:02:16,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 62.774193548387096) internal successors, (1946), 31 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:16,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:02:16,840 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:02:16,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 04:02:17,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:02:17,046 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:02:17,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:02:17,047 INFO L85 PathProgramCache]: Analyzing trace with hash 205051960, now seen corresponding path program 10 times [2023-08-31 04:02:17,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:02:17,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433347202] [2023-08-31 04:02:17,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:02:17,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:02:17,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:02:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:02:17,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:02:17,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433347202] [2023-08-31 04:02:17,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433347202] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:02:17,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807787476] [2023-08-31 04:02:17,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:02:17,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:02:17,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:02:17,648 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:02:17,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 04:02:17,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:02:17,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:02:17,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-31 04:02:17,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:02:17,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:02:17,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-31 04:02:18,018 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 04:02:18,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:02:18,148 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:02:18,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 35 [2023-08-31 04:02:18,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-08-31 04:02:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 04:02:18,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807787476] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:02:18,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:02:18,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 28 [2023-08-31 04:02:18,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934898834] [2023-08-31 04:02:18,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:02:18,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 04:02:18,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:02:18,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 04:02:18,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=778, Unknown=7, NotChecked=0, Total=870 [2023-08-31 04:02:19,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 211 [2023-08-31 04:02:19,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 111 transitions, 1452 flow. Second operand has 30 states, 30 states have (on average 72.8) internal successors, (2184), 30 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:19,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:02:19,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 211 [2023-08-31 04:02:19,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:02:20,088 INFO L130 PetriNetUnfolder]: 1066/2007 cut-off events. [2023-08-31 04:02:20,088 INFO L131 PetriNetUnfolder]: For 8399/8399 co-relation queries the response was YES. [2023-08-31 04:02:20,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10221 conditions, 2007 events. 1066/2007 cut-off events. For 8399/8399 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 12343 event pairs, 52 based on Foata normal form. 1/2008 useless extension candidates. Maximal degree in co-relation 10155. Up to 1230 conditions per place. [2023-08-31 04:02:20,103 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 65 selfloop transitions, 93 changer transitions 44/202 dead transitions. [2023-08-31 04:02:20,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 202 transitions, 2346 flow [2023-08-31 04:02:20,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 04:02:20,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 04:02:20,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1405 transitions. [2023-08-31 04:02:20,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699315429173249 [2023-08-31 04:02:20,107 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1405 transitions. [2023-08-31 04:02:20,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1405 transitions. [2023-08-31 04:02:20,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:02:20,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1405 transitions. [2023-08-31 04:02:20,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 78.05555555555556) internal successors, (1405), 18 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:20,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 211.0) internal successors, (4009), 19 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:20,114 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 211.0) internal successors, (4009), 19 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:20,114 INFO L175 Difference]: Start difference. First operand has 118 places, 111 transitions, 1452 flow. Second operand 18 states and 1405 transitions. [2023-08-31 04:02:20,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 202 transitions, 2346 flow [2023-08-31 04:02:20,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 202 transitions, 2061 flow, removed 48 selfloop flow, removed 15 redundant places. [2023-08-31 04:02:20,169 INFO L231 Difference]: Finished difference. Result has 110 places, 114 transitions, 1432 flow [2023-08-31 04:02:20,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1432, PETRI_PLACES=110, PETRI_TRANSITIONS=114} [2023-08-31 04:02:20,169 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 91 predicate places. [2023-08-31 04:02:20,169 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 114 transitions, 1432 flow [2023-08-31 04:02:20,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 72.8) internal successors, (2184), 30 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:20,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:02:20,170 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:02:20,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 04:02:20,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-31 04:02:20,376 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:02:20,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:02:20,376 INFO L85 PathProgramCache]: Analyzing trace with hash 290459673, now seen corresponding path program 11 times [2023-08-31 04:02:20,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:02:20,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731738139] [2023-08-31 04:02:20,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:02:20,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:02:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:02:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 04:02:20,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:02:20,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731738139] [2023-08-31 04:02:20,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731738139] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:02:20,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558092943] [2023-08-31 04:02:20,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:02:20,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:02:20,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:02:20,485 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:02:20,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 04:02:20,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 04:02:20,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:02:20,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 04:02:20,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:02:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 04:02:20,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:02:20,662 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 04:02:20,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558092943] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:02:20,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:02:20,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-08-31 04:02:20,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471426951] [2023-08-31 04:02:20,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:02:20,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 04:02:20,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:02:20,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 04:02:20,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-31 04:02:20,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-08-31 04:02:20,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 114 transitions, 1432 flow. Second operand has 6 states, 6 states have (on average 99.33333333333333) internal successors, (596), 6 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:20,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:02:20,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-08-31 04:02:20,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:02:21,166 INFO L130 PetriNetUnfolder]: 2058/3848 cut-off events. [2023-08-31 04:02:21,166 INFO L131 PetriNetUnfolder]: For 16564/16564 co-relation queries the response was YES. [2023-08-31 04:02:21,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18595 conditions, 3848 events. 2058/3848 cut-off events. For 16564/16564 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 26569 event pairs, 336 based on Foata normal form. 18/3866 useless extension candidates. Maximal degree in co-relation 18549. Up to 2364 conditions per place. [2023-08-31 04:02:21,193 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 93 selfloop transitions, 122 changer transitions 0/215 dead transitions. [2023-08-31 04:02:21,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 215 transitions, 3102 flow [2023-08-31 04:02:21,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 04:02:21,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 04:02:21,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 635 transitions. [2023-08-31 04:02:21,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5015797788309637 [2023-08-31 04:02:21,196 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 635 transitions. [2023-08-31 04:02:21,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 635 transitions. [2023-08-31 04:02:21,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:02:21,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 635 transitions. [2023-08-31 04:02:21,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 105.83333333333333) internal successors, (635), 6 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:21,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 211.0) internal successors, (1477), 7 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:21,199 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 211.0) internal successors, (1477), 7 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:21,199 INFO L175 Difference]: Start difference. First operand has 110 places, 114 transitions, 1432 flow. Second operand 6 states and 635 transitions. [2023-08-31 04:02:21,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 215 transitions, 3102 flow [2023-08-31 04:02:21,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 215 transitions, 2975 flow, removed 15 selfloop flow, removed 9 redundant places. [2023-08-31 04:02:21,247 INFO L231 Difference]: Finished difference. Result has 107 places, 182 transitions, 2658 flow [2023-08-31 04:02:21,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=1354, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2658, PETRI_PLACES=107, PETRI_TRANSITIONS=182} [2023-08-31 04:02:21,249 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 88 predicate places. [2023-08-31 04:02:21,249 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 182 transitions, 2658 flow [2023-08-31 04:02:21,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 99.33333333333333) internal successors, (596), 6 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:21,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:02:21,249 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:02:21,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-31 04:02:21,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-31 04:02:21,455 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:02:21,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:02:21,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1809702648, now seen corresponding path program 12 times [2023-08-31 04:02:21,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:02:21,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434903570] [2023-08-31 04:02:21,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:02:21,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:02:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:02:21,982 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:02:21,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:02:21,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434903570] [2023-08-31 04:02:21,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434903570] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:02:21,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104449396] [2023-08-31 04:02:21,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:02:21,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:02:21,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:02:21,984 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:02:21,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 04:02:22,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 04:02:22,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:02:22,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-31 04:02:22,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:02:22,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-31 04:02:22,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 04:02:22,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 04:02:22,636 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 04:02:22,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2023-08-31 04:02:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:02:22,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:02:23,293 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:02:23,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 53 [2023-08-31 04:02:23,305 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 04:02:23,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 160 treesize of output 142 [2023-08-31 04:02:23,316 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 04:02:23,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 105 [2023-08-31 04:02:23,327 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 04:02:23,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 67 [2023-08-31 04:02:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:02:23,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104449396] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:02:23,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:02:23,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 41 [2023-08-31 04:02:23,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734169187] [2023-08-31 04:02:23,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:02:23,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-31 04:02:23,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:02:23,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-31 04:02:23,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1604, Unknown=2, NotChecked=0, Total=1806 [2023-08-31 04:02:25,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 211 [2023-08-31 04:02:25,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 182 transitions, 2658 flow. Second operand has 43 states, 43 states have (on average 62.348837209302324) internal successors, (2681), 43 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:25,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:02:25,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 211 [2023-08-31 04:02:25,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:02:46,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:02:50,565 INFO L130 PetriNetUnfolder]: 8591/16018 cut-off events. [2023-08-31 04:02:50,565 INFO L131 PetriNetUnfolder]: For 70405/70405 co-relation queries the response was YES. [2023-08-31 04:02:50,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80744 conditions, 16018 events. 8591/16018 cut-off events. For 70405/70405 co-relation queries the response was YES. Maximal size of possible extension queue 965. Compared 138059 event pairs, 300 based on Foata normal form. 168/16186 useless extension candidates. Maximal degree in co-relation 67529. Up to 9851 conditions per place. [2023-08-31 04:02:50,657 INFO L137 encePairwiseOnDemand]: 204/211 looper letters, 608 selfloop transitions, 711 changer transitions 324/1643 dead transitions. [2023-08-31 04:02:50,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 1643 transitions, 18837 flow [2023-08-31 04:02:50,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2023-08-31 04:02:50,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2023-08-31 04:02:50,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 9863 transitions. [2023-08-31 04:02:50,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32918363260129496 [2023-08-31 04:02:50,682 INFO L72 ComplementDD]: Start complementDD. Operand 142 states and 9863 transitions. [2023-08-31 04:02:50,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 142 states and 9863 transitions. [2023-08-31 04:02:50,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:02:50,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 142 states and 9863 transitions. [2023-08-31 04:02:50,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 143 states, 142 states have (on average 69.45774647887323) internal successors, (9863), 142 states have internal predecessors, (9863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:50,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 143 states, 143 states have (on average 211.0) internal successors, (30173), 143 states have internal predecessors, (30173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:50,746 INFO L81 ComplementDD]: Finished complementDD. Result has 143 states, 143 states have (on average 211.0) internal successors, (30173), 143 states have internal predecessors, (30173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:50,746 INFO L175 Difference]: Start difference. First operand has 107 places, 182 transitions, 2658 flow. Second operand 142 states and 9863 transitions. [2023-08-31 04:02:50,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 1643 transitions, 18837 flow [2023-08-31 04:02:51,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 1643 transitions, 18553 flow, removed 142 selfloop flow, removed 0 redundant places. [2023-08-31 04:02:51,030 INFO L231 Difference]: Finished difference. Result has 326 places, 737 transitions, 12959 flow [2023-08-31 04:02:51,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=2592, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=142, PETRI_FLOW=12959, PETRI_PLACES=326, PETRI_TRANSITIONS=737} [2023-08-31 04:02:51,031 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 307 predicate places. [2023-08-31 04:02:51,032 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 737 transitions, 12959 flow [2023-08-31 04:02:51,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 62.348837209302324) internal successors, (2681), 43 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:51,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:02:51,033 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:02:51,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-31 04:02:51,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-31 04:02:51,234 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:02:51,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:02:51,234 INFO L85 PathProgramCache]: Analyzing trace with hash -139368886, now seen corresponding path program 13 times [2023-08-31 04:02:51,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:02:51,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182630875] [2023-08-31 04:02:51,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:02:51,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:02:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:02:51,806 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:02:51,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:02:51,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182630875] [2023-08-31 04:02:51,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182630875] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:02:51,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341133807] [2023-08-31 04:02:51,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 04:02:51,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:02:51,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:02:51,809 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:02:51,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 04:02:51,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:02:51,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 04:02:51,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:02:52,149 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 04:02:52,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:02:52,257 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 04:02:52,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2023-08-31 04:02:52,342 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 04:02:52,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341133807] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:02:52,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:02:52,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-08-31 04:02:52,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118461183] [2023-08-31 04:02:52,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:02:52,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-31 04:02:52,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:02:52,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-31 04:02:52,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2023-08-31 04:02:53,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 211 [2023-08-31 04:02:53,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 737 transitions, 12959 flow. Second operand has 33 states, 33 states have (on average 85.81818181818181) internal successors, (2832), 33 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:02:53,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:02:53,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 211 [2023-08-31 04:02:53,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:02:59,989 INFO L130 PetriNetUnfolder]: 9459/17584 cut-off events. [2023-08-31 04:02:59,989 INFO L131 PetriNetUnfolder]: For 1085152/1085152 co-relation queries the response was YES. [2023-08-31 04:03:00,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133567 conditions, 17584 events. 9459/17584 cut-off events. For 1085152/1085152 co-relation queries the response was YES. Maximal size of possible extension queue 1019. Compared 152422 event pairs, 1145 based on Foata normal form. 37/17621 useless extension candidates. Maximal degree in co-relation 131935. Up to 10837 conditions per place. [2023-08-31 04:03:00,172 INFO L137 encePairwiseOnDemand]: 205/211 looper letters, 314 selfloop transitions, 707 changer transitions 163/1184 dead transitions. [2023-08-31 04:03:00,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 1184 transitions, 20985 flow [2023-08-31 04:03:00,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-31 04:03:00,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-31 04:03:00,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4870 transitions. [2023-08-31 04:03:00,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435482428686399 [2023-08-31 04:03:00,179 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4870 transitions. [2023-08-31 04:03:00,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4870 transitions. [2023-08-31 04:03:00,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:03:00,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4870 transitions. [2023-08-31 04:03:00,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 91.88679245283019) internal successors, (4870), 53 states have internal predecessors, (4870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:03:00,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 211.0) internal successors, (11394), 54 states have internal predecessors, (11394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:03:00,196 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 211.0) internal successors, (11394), 54 states have internal predecessors, (11394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:03:00,197 INFO L175 Difference]: Start difference. First operand has 326 places, 737 transitions, 12959 flow. Second operand 53 states and 4870 transitions. [2023-08-31 04:03:00,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 1184 transitions, 20985 flow [2023-08-31 04:03:14,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 1184 transitions, 19327 flow, removed 738 selfloop flow, removed 6 redundant places. [2023-08-31 04:03:14,266 INFO L231 Difference]: Finished difference. Result has 384 places, 824 transitions, 15285 flow [2023-08-31 04:03:14,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=11700, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=629, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=15285, PETRI_PLACES=384, PETRI_TRANSITIONS=824} [2023-08-31 04:03:14,268 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 365 predicate places. [2023-08-31 04:03:14,268 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 824 transitions, 15285 flow [2023-08-31 04:03:14,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 85.81818181818181) internal successors, (2832), 33 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:03:14,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:03:14,269 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:03:14,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-31 04:03:14,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-31 04:03:14,470 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:03:14,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:03:14,471 INFO L85 PathProgramCache]: Analyzing trace with hash 779977742, now seen corresponding path program 14 times [2023-08-31 04:03:14,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:03:14,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538487666] [2023-08-31 04:03:14,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:03:14,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:03:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:03:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:03:15,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:03:15,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538487666] [2023-08-31 04:03:15,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538487666] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:03:15,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376269538] [2023-08-31 04:03:15,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:03:15,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:03:15,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:03:15,549 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:03:15,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 04:03:15,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:03:15,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:03:15,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-31 04:03:15,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:03:15,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:03:15,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-31 04:03:16,110 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 04:03:16,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:03:16,256 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_559 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_559) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 12)))) is different from false [2023-08-31 04:03:16,271 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:03:16,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 35 [2023-08-31 04:03:16,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-08-31 04:03:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 4 not checked. [2023-08-31 04:03:16,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376269538] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:03:16,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:03:16,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2023-08-31 04:03:16,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360966893] [2023-08-31 04:03:16,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:03:16,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-31 04:03:16,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:03:16,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-31 04:03:16,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1170, Unknown=1, NotChecked=68, Total=1332 [2023-08-31 04:03:16,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 211 [2023-08-31 04:03:16,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 824 transitions, 15285 flow. Second operand has 37 states, 37 states have (on average 68.62162162162163) internal successors, (2539), 37 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:03:16,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:03:16,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 211 [2023-08-31 04:03:16,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:03:24,097 INFO L130 PetriNetUnfolder]: 10741/19640 cut-off events. [2023-08-31 04:03:24,097 INFO L131 PetriNetUnfolder]: For 1436966/1436966 co-relation queries the response was YES. [2023-08-31 04:03:24,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163118 conditions, 19640 events. 10741/19640 cut-off events. For 1436966/1436966 co-relation queries the response was YES. Maximal size of possible extension queue 1130. Compared 169507 event pairs, 1119 based on Foata normal form. 12/19652 useless extension candidates. Maximal degree in co-relation 162978. Up to 12301 conditions per place. [2023-08-31 04:03:24,331 INFO L137 encePairwiseOnDemand]: 201/211 looper letters, 175 selfloop transitions, 828 changer transitions 60/1063 dead transitions. [2023-08-31 04:03:24,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 1063 transitions, 21290 flow [2023-08-31 04:03:24,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-31 04:03:24,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-31 04:03:24,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1851 transitions. [2023-08-31 04:03:24,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3509004739336493 [2023-08-31 04:03:24,337 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1851 transitions. [2023-08-31 04:03:24,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1851 transitions. [2023-08-31 04:03:24,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:03:24,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1851 transitions. [2023-08-31 04:03:24,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 74.04) internal successors, (1851), 25 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:03:24,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 211.0) internal successors, (5486), 26 states have internal predecessors, (5486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:03:24,347 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 211.0) internal successors, (5486), 26 states have internal predecessors, (5486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:03:24,347 INFO L175 Difference]: Start difference. First operand has 384 places, 824 transitions, 15285 flow. Second operand 25 states and 1851 transitions. [2023-08-31 04:03:24,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 1063 transitions, 21290 flow [2023-08-31 04:03:40,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 1063 transitions, 20037 flow, removed 118 selfloop flow, removed 26 redundant places. [2023-08-31 04:03:40,421 INFO L231 Difference]: Finished difference. Result has 385 places, 930 transitions, 18275 flow [2023-08-31 04:03:40,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=14045, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=824, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=722, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=18275, PETRI_PLACES=385, PETRI_TRANSITIONS=930} [2023-08-31 04:03:40,422 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 366 predicate places. [2023-08-31 04:03:40,422 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 930 transitions, 18275 flow [2023-08-31 04:03:40,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 68.62162162162163) internal successors, (2539), 37 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:03:40,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:03:40,423 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:03:40,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-31 04:03:40,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:03:40,630 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:03:40,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:03:40,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1070764383, now seen corresponding path program 15 times [2023-08-31 04:03:40,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:03:40,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209416856] [2023-08-31 04:03:40,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:03:40,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:03:40,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:03:40,750 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 04:03:40,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:03:40,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209416856] [2023-08-31 04:03:40,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209416856] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:03:40,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107552163] [2023-08-31 04:03:40,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:03:40,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:03:40,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:03:40,757 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:03:40,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-31 04:03:40,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 04:03:40,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:03:40,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 76 conjunts are in the unsatisfiable core [2023-08-31 04:03:40,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:03:41,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-31 04:03:41,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 04:03:41,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 04:03:41,470 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-08-31 04:03:41,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 16 [2023-08-31 04:03:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:03:41,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:03:42,036 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:03:42,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 97 [2023-08-31 04:03:42,062 INFO L321 Elim1Store]: treesize reduction 15, result has 54.5 percent of original size [2023-08-31 04:03:42,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 336 treesize of output 308 [2023-08-31 04:03:42,085 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2023-08-31 04:03:42,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 291 treesize of output 217 [2023-08-31 04:03:42,103 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2023-08-31 04:03:42,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 196 treesize of output 159 [2023-08-31 04:03:42,333 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 04:03:42,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107552163] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:03:42,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:03:42,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 14, 13] total 32 [2023-08-31 04:03:42,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543139121] [2023-08-31 04:03:42,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:03:42,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-31 04:03:42,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:03:42,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-31 04:03:42,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=861, Unknown=7, NotChecked=0, Total=1056 [2023-08-31 04:03:44,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:03:46,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:03:46,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 211 [2023-08-31 04:03:46,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 930 transitions, 18275 flow. Second operand has 33 states, 33 states have (on average 63.0) internal successors, (2079), 33 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) [2023-08-31 04:03:46,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:03:46,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 211 [2023-08-31 04:03:46,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:04:03,903 INFO L130 PetriNetUnfolder]: 22749/42342 cut-off events. [2023-08-31 04:04:03,903 INFO L131 PetriNetUnfolder]: For 2832658/2832658 co-relation queries the response was YES. [2023-08-31 04:04:04,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421022 conditions, 42342 events. 22749/42342 cut-off events. For 2832658/2832658 co-relation queries the response was YES. Maximal size of possible extension queue 2489. Compared 417051 event pairs, 3249 based on Foata normal form. 124/42466 useless extension candidates. Maximal degree in co-relation 420887. Up to 26047 conditions per place. [2023-08-31 04:04:04,842 INFO L137 encePairwiseOnDemand]: 204/211 looper letters, 411 selfloop transitions, 886 changer transitions 1077/2374 dead transitions. [2023-08-31 04:04:04,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 2374 transitions, 48941 flow [2023-08-31 04:04:04,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-08-31 04:04:04,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-08-31 04:04:04,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 4689 transitions. [2023-08-31 04:04:04,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3268051296347923 [2023-08-31 04:04:04,850 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 4689 transitions. [2023-08-31 04:04:04,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 4689 transitions. [2023-08-31 04:04:04,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:04:04,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 4689 transitions. [2023-08-31 04:04:04,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 68.95588235294117) internal successors, (4689), 68 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:04:04,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 211.0) internal successors, (14559), 69 states have internal predecessors, (14559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:04:04,872 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 211.0) internal successors, (14559), 69 states have internal predecessors, (14559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:04:04,872 INFO L175 Difference]: Start difference. First operand has 385 places, 930 transitions, 18275 flow. Second operand 68 states and 4689 transitions. [2023-08-31 04:04:04,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 2374 transitions, 48941 flow [2023-08-31 04:04:34,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 2374 transitions, 45262 flow, removed 688 selfloop flow, removed 18 redundant places. [2023-08-31 04:04:34,879 INFO L231 Difference]: Finished difference. Result has 454 places, 1247 transitions, 26433 flow [2023-08-31 04:04:34,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=16503, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=930, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=501, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=26433, PETRI_PLACES=454, PETRI_TRANSITIONS=1247} [2023-08-31 04:04:34,880 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 435 predicate places. [2023-08-31 04:04:34,881 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 1247 transitions, 26433 flow [2023-08-31 04:04:34,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 63.0) internal successors, (2079), 33 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) [2023-08-31 04:04:34,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:04:34,882 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:04:34,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-31 04:04:35,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-31 04:04:35,088 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:04:35,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:04:35,089 INFO L85 PathProgramCache]: Analyzing trace with hash -527780414, now seen corresponding path program 16 times [2023-08-31 04:04:35,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:04:35,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826946009] [2023-08-31 04:04:35,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:04:35,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:04:35,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:04:35,338 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-31 04:04:35,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:04:35,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826946009] [2023-08-31 04:04:35,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826946009] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:04:35,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986620963] [2023-08-31 04:04:35,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:04:35,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:04:35,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:04:35,341 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:04:35,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-31 04:04:35,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:04:35,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:04:35,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-31 04:04:35,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:04:35,728 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 04:04:35,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:04:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-31 04:04:35,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986620963] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:04:35,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:04:35,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 34 [2023-08-31 04:04:35,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893978308] [2023-08-31 04:04:35,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:04:35,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-31 04:04:35,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:04:35,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-31 04:04:35,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=871, Unknown=0, NotChecked=0, Total=1190 [2023-08-31 04:04:36,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 211 [2023-08-31 04:04:36,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 1247 transitions, 26433 flow. Second operand has 35 states, 35 states have (on average 88.57142857142857) internal successors, (3100), 35 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:04:36,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:04:36,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 211 [2023-08-31 04:04:36,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:04:42,618 INFO L130 PetriNetUnfolder]: 7993/15078 cut-off events. [2023-08-31 04:04:42,618 INFO L131 PetriNetUnfolder]: For 1101729/1101729 co-relation queries the response was YES. [2023-08-31 04:04:42,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149742 conditions, 15078 events. 7993/15078 cut-off events. For 1101729/1101729 co-relation queries the response was YES. Maximal size of possible extension queue 913. Compared 132798 event pairs, 4745 based on Foata normal form. 141/15219 useless extension candidates. Maximal degree in co-relation 149605. Up to 13633 conditions per place. [2023-08-31 04:04:42,820 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 613 selfloop transitions, 6 changer transitions 169/788 dead transitions. [2023-08-31 04:04:42,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 788 transitions, 17736 flow [2023-08-31 04:04:42,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 04:04:42,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 04:04:42,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2155 transitions. [2023-08-31 04:04:42,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4440552235730476 [2023-08-31 04:04:42,824 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2155 transitions. [2023-08-31 04:04:42,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2155 transitions. [2023-08-31 04:04:42,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:04:42,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2155 transitions. [2023-08-31 04:04:42,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 93.69565217391305) internal successors, (2155), 23 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:04:42,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 211.0) internal successors, (5064), 24 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:04:42,831 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 211.0) internal successors, (5064), 24 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:04:42,831 INFO L175 Difference]: Start difference. First operand has 454 places, 1247 transitions, 26433 flow. Second operand 23 states and 2155 transitions. [2023-08-31 04:04:42,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 788 transitions, 17736 flow [2023-08-31 04:05:00,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 788 transitions, 16237 flow, removed 583 selfloop flow, removed 63 redundant places. [2023-08-31 04:05:00,735 INFO L231 Difference]: Finished difference. Result has 314 places, 619 transitions, 12967 flow [2023-08-31 04:05:00,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=13990, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12967, PETRI_PLACES=314, PETRI_TRANSITIONS=619} [2023-08-31 04:05:00,735 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 295 predicate places. [2023-08-31 04:05:00,736 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 619 transitions, 12967 flow [2023-08-31 04:05:00,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 88.57142857142857) internal successors, (3100), 35 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:05:00,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:05:00,736 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:05:00,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-31 04:05:00,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:05:00,937 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:05:00,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:05:00,937 INFO L85 PathProgramCache]: Analyzing trace with hash -338254250, now seen corresponding path program 17 times [2023-08-31 04:05:00,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:05:00,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491601745] [2023-08-31 04:05:00,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:05:00,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:05:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:05:01,565 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:05:01,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:05:01,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491601745] [2023-08-31 04:05:01,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491601745] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:05:01,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797692397] [2023-08-31 04:05:01,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:05:01,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:05:01,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:05:01,567 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:05:01,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-31 04:05:01,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 04:05:01,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:05:01,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-31 04:05:01,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:05:02,087 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:05:02,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:05:02,240 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 04:05:02,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2023-08-31 04:05:02,378 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-31 04:05:02,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797692397] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:05:02,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:05:02,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 11] total 41 [2023-08-31 04:05:02,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061501598] [2023-08-31 04:05:02,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:05:02,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-31 04:05:02,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:05:02,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-31 04:05:02,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1682, Unknown=0, NotChecked=0, Total=1806 [2023-08-31 04:05:03,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 211 [2023-08-31 04:05:03,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 619 transitions, 12967 flow. Second operand has 43 states, 43 states have (on average 85.65116279069767) internal successors, (3683), 43 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:05:03,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:05:03,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 211 [2023-08-31 04:05:03,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:05:09,988 INFO L130 PetriNetUnfolder]: 9200/17044 cut-off events. [2023-08-31 04:05:09,988 INFO L131 PetriNetUnfolder]: For 269785/269785 co-relation queries the response was YES. [2023-08-31 04:05:10,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129035 conditions, 17044 events. 9200/17044 cut-off events. For 269785/269785 co-relation queries the response was YES. Maximal size of possible extension queue 1095. Compared 147937 event pairs, 720 based on Foata normal form. 11/17055 useless extension candidates. Maximal degree in co-relation 128950. Up to 10508 conditions per place. [2023-08-31 04:05:10,147 INFO L137 encePairwiseOnDemand]: 205/211 looper letters, 278 selfloop transitions, 733 changer transitions 240/1251 dead transitions. [2023-08-31 04:05:10,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 1251 transitions, 22796 flow [2023-08-31 04:05:10,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-08-31 04:05:10,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-08-31 04:05:10,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 6989 transitions. [2023-08-31 04:05:10,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43583187827388375 [2023-08-31 04:05:10,155 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 6989 transitions. [2023-08-31 04:05:10,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 6989 transitions. [2023-08-31 04:05:10,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:05:10,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 6989 transitions. [2023-08-31 04:05:10,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 91.96052631578948) internal successors, (6989), 76 states have internal predecessors, (6989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:05:10,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 211.0) internal successors, (16247), 77 states have internal predecessors, (16247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:05:10,434 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 211.0) internal successors, (16247), 77 states have internal predecessors, (16247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:05:10,435 INFO L175 Difference]: Start difference. First operand has 314 places, 619 transitions, 12967 flow. Second operand 76 states and 6989 transitions. [2023-08-31 04:05:10,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 1251 transitions, 22796 flow [2023-08-31 04:05:14,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 1251 transitions, 22110 flow, removed 272 selfloop flow, removed 30 redundant places. [2023-08-31 04:05:14,258 INFO L231 Difference]: Finished difference. Result has 321 places, 765 transitions, 18180 flow [2023-08-31 04:05:14,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=12735, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=592, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=18180, PETRI_PLACES=321, PETRI_TRANSITIONS=765} [2023-08-31 04:05:14,259 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 302 predicate places. [2023-08-31 04:05:14,259 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 765 transitions, 18180 flow [2023-08-31 04:05:14,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 85.65116279069767) internal successors, (3683), 43 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:05:14,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:05:14,260 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:05:14,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-31 04:05:14,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:05:14,461 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:05:14,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:05:14,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1419600050, now seen corresponding path program 18 times [2023-08-31 04:05:14,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:05:14,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717681274] [2023-08-31 04:05:14,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:05:14,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:05:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:05:15,234 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:05:15,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:05:15,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717681274] [2023-08-31 04:05:15,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717681274] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:05:15,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391535342] [2023-08-31 04:05:15,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:05:15,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:05:15,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:05:15,236 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:05:15,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-31 04:05:15,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 04:05:15,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:05:15,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-31 04:05:15,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:05:15,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-31 04:05:15,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 04:05:15,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:05:15,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-31 04:05:16,259 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 04:05:16,261 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:05:16,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-08-31 04:05:16,265 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 04:05:16,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:05:16,763 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:05:16,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 49 [2023-08-31 04:05:16,772 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:05:16,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2023-08-31 04:05:16,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2023-08-31 04:05:16,789 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:05:16,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 47 [2023-08-31 04:05:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 04:05:17,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391535342] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:05:17,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:05:17,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 44 [2023-08-31 04:05:17,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272288933] [2023-08-31 04:05:17,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:05:17,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-08-31 04:05:17,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:05:17,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-08-31 04:05:17,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1846, Unknown=0, NotChecked=0, Total=2070 [2023-08-31 04:05:19,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 211 [2023-08-31 04:05:19,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 765 transitions, 18180 flow. Second operand has 46 states, 46 states have (on average 75.5) internal successors, (3473), 46 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:05:19,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:05:19,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 211 [2023-08-31 04:05:19,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:05:36,143 INFO L130 PetriNetUnfolder]: 20457/37922 cut-off events. [2023-08-31 04:05:36,143 INFO L131 PetriNetUnfolder]: For 569651/569651 co-relation queries the response was YES. [2023-08-31 04:05:36,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288343 conditions, 37922 events. 20457/37922 cut-off events. For 569651/569651 co-relation queries the response was YES. Maximal size of possible extension queue 2478. Compared 372119 event pairs, 1702 based on Foata normal form. 8/37930 useless extension candidates. Maximal degree in co-relation 288260. Up to 23391 conditions per place. [2023-08-31 04:05:36,631 INFO L137 encePairwiseOnDemand]: 205/211 looper letters, 288 selfloop transitions, 1682 changer transitions 222/2192 dead transitions. [2023-08-31 04:05:36,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 2192 transitions, 49356 flow [2023-08-31 04:05:36,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-08-31 04:05:36,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-08-31 04:05:36,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 6132 transitions. [2023-08-31 04:05:36,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38748815165876777 [2023-08-31 04:05:36,640 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 6132 transitions. [2023-08-31 04:05:36,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 6132 transitions. [2023-08-31 04:05:36,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:05:36,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 6132 transitions. [2023-08-31 04:05:36,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 81.76) internal successors, (6132), 75 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:05:36,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 211.0) internal successors, (16036), 76 states have internal predecessors, (16036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:05:36,661 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 211.0) internal successors, (16036), 76 states have internal predecessors, (16036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:05:36,661 INFO L175 Difference]: Start difference. First operand has 321 places, 765 transitions, 18180 flow. Second operand 75 states and 6132 transitions. [2023-08-31 04:05:36,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 2192 transitions, 49356 flow [2023-08-31 04:05:45,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 2192 transitions, 45081 flow, removed 525 selfloop flow, removed 31 redundant places. [2023-08-31 04:05:45,808 INFO L231 Difference]: Finished difference. Result has 380 places, 1716 transitions, 40348 flow [2023-08-31 04:05:45,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=16430, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=733, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=40348, PETRI_PLACES=380, PETRI_TRANSITIONS=1716} [2023-08-31 04:05:45,809 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 361 predicate places. [2023-08-31 04:05:45,809 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 1716 transitions, 40348 flow [2023-08-31 04:05:45,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 75.5) internal successors, (3473), 46 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:05:45,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:05:45,810 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:05:45,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-31 04:05:46,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:05:46,017 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:05:46,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:05:46,017 INFO L85 PathProgramCache]: Analyzing trace with hash -46687399, now seen corresponding path program 19 times [2023-08-31 04:05:46,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:05:46,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678103354] [2023-08-31 04:05:46,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:05:46,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:05:46,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:05:46,160 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-31 04:05:46,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:05:46,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678103354] [2023-08-31 04:05:46,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678103354] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:05:46,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888877774] [2023-08-31 04:05:46,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 04:05:46,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:05:46,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:05:46,165 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:05:46,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-31 04:05:46,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:05:46,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:05:46,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:05:46,333 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-31 04:05:46,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:05:46,413 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-31 04:05:46,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888877774] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:05:46,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:05:46,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2023-08-31 04:05:46,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475263809] [2023-08-31 04:05:46,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:05:46,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 04:05:46,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:05:46,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 04:05:46,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-08-31 04:05:46,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-08-31 04:05:46,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 1716 transitions, 40348 flow. Second operand has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:05:46,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:05:46,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-08-31 04:05:46,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:06:15,456 INFO L130 PetriNetUnfolder]: 34925/64331 cut-off events. [2023-08-31 04:06:15,456 INFO L131 PetriNetUnfolder]: For 1310799/1310799 co-relation queries the response was YES. [2023-08-31 04:06:16,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 532356 conditions, 64331 events. 34925/64331 cut-off events. For 1310799/1310799 co-relation queries the response was YES. Maximal size of possible extension queue 3949. Compared 665514 event pairs, 5063 based on Foata normal form. 72/64403 useless extension candidates. Maximal degree in co-relation 532262. Up to 39725 conditions per place. [2023-08-31 04:06:16,797 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 686 selfloop transitions, 2024 changer transitions 0/2710 dead transitions. [2023-08-31 04:06:16,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 2710 transitions, 69850 flow [2023-08-31 04:06:16,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 04:06:16,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 04:06:16,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 849 transitions. [2023-08-31 04:06:16,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029620853080569 [2023-08-31 04:06:16,798 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 849 transitions. [2023-08-31 04:06:16,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 849 transitions. [2023-08-31 04:06:16,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:06:16,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 849 transitions. [2023-08-31 04:06:16,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 106.125) internal successors, (849), 8 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:16,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 211.0) internal successors, (1899), 9 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:16,801 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 211.0) internal successors, (1899), 9 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:16,801 INFO L175 Difference]: Start difference. First operand has 380 places, 1716 transitions, 40348 flow. Second operand 8 states and 849 transitions. [2023-08-31 04:06:16,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 2710 transitions, 69850 flow [2023-08-31 04:06:42,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 2710 transitions, 68403 flow, removed 717 selfloop flow, removed 6 redundant places. [2023-08-31 04:06:42,589 INFO L231 Difference]: Finished difference. Result has 387 places, 2661 transitions, 71364 flow [2023-08-31 04:06:42,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=39759, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=71364, PETRI_PLACES=387, PETRI_TRANSITIONS=2661} [2023-08-31 04:06:42,591 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 368 predicate places. [2023-08-31 04:06:42,591 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 2661 transitions, 71364 flow [2023-08-31 04:06:42,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:42,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:06:42,591 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:06:42,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-31 04:06:42,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:06:42,792 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:06:42,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:06:42,792 INFO L85 PathProgramCache]: Analyzing trace with hash 418152632, now seen corresponding path program 20 times [2023-08-31 04:06:42,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:06:42,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225588515] [2023-08-31 04:06:42,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:06:42,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:06:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:06:43,450 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-31 04:06:43,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:06:43,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225588515] [2023-08-31 04:06:43,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225588515] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:06:43,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176887333] [2023-08-31 04:06:43,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:06:43,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:06:43,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:06:43,453 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:06:43,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-31 04:06:43,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:06:43,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:06:43,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-31 04:06:43,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:06:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-31 04:06:43,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:06:43,940 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 04:06:43,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2023-08-31 04:06:44,065 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-31 04:06:44,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176887333] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:06:44,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:06:44,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 36 [2023-08-31 04:06:44,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649851587] [2023-08-31 04:06:44,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:06:44,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-31 04:06:44,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:06:44,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-31 04:06:44,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1295, Unknown=0, NotChecked=0, Total=1406 [2023-08-31 04:06:44,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 211 [2023-08-31 04:06:44,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 2661 transitions, 71364 flow. Second operand has 38 states, 38 states have (on average 87.55263157894737) internal successors, (3327), 38 states have internal predecessors, (3327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:44,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:06:44,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 211 [2023-08-31 04:06:44,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:08:01,086 INFO L130 PetriNetUnfolder]: 55883/102449 cut-off events. [2023-08-31 04:08:01,086 INFO L131 PetriNetUnfolder]: For 2515855/2515855 co-relation queries the response was YES. [2023-08-31 04:08:03,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 912797 conditions, 102449 events. 55883/102449 cut-off events. For 2515855/2515855 co-relation queries the response was YES. Maximal size of possible extension queue 4868. Compared 1089803 event pairs, 3415 based on Foata normal form. 126/102575 useless extension candidates. Maximal degree in co-relation 912696. Up to 63321 conditions per place. [2023-08-31 04:08:03,614 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 1229 selfloop transitions, 4048 changer transitions 534/5811 dead transitions. [2023-08-31 04:08:03,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 636 places, 5811 transitions, 137163 flow [2023-08-31 04:08:03,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 250 states. [2023-08-31 04:08:03,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2023-08-31 04:08:03,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 23651 transitions. [2023-08-31 04:08:03,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4483601895734597 [2023-08-31 04:08:03,635 INFO L72 ComplementDD]: Start complementDD. Operand 250 states and 23651 transitions. [2023-08-31 04:08:03,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 250 states and 23651 transitions. [2023-08-31 04:08:03,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:08:03,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 250 states and 23651 transitions. [2023-08-31 04:08:03,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 251 states, 250 states have (on average 94.604) internal successors, (23651), 250 states have internal predecessors, (23651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:03,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 251 states, 251 states have (on average 211.0) internal successors, (52961), 251 states have internal predecessors, (52961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:03,729 INFO L81 ComplementDD]: Finished complementDD. Result has 251 states, 251 states have (on average 211.0) internal successors, (52961), 251 states have internal predecessors, (52961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:03,729 INFO L175 Difference]: Start difference. First operand has 387 places, 2661 transitions, 71364 flow. Second operand 250 states and 23651 transitions. [2023-08-31 04:08:03,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 636 places, 5811 transitions, 137163 flow [2023-08-31 04:08:49,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 636 places, 5811 transitions, 128413 flow, removed 4375 selfloop flow, removed 0 redundant places. [2023-08-31 04:08:49,603 INFO L231 Difference]: Finished difference. Result has 704 places, 4155 transitions, 110673 flow [2023-08-31 04:08:49,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=68540, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2580, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=250, PETRI_FLOW=110673, PETRI_PLACES=704, PETRI_TRANSITIONS=4155} [2023-08-31 04:08:49,607 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 685 predicate places. [2023-08-31 04:08:49,607 INFO L495 AbstractCegarLoop]: Abstraction has has 704 places, 4155 transitions, 110673 flow [2023-08-31 04:08:49,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 87.55263157894737) internal successors, (3327), 38 states have internal predecessors, (3327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:49,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:08:49,608 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:08:49,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-31 04:08:49,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-31 04:08:49,817 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:08:49,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:08:49,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1389640500, now seen corresponding path program 21 times [2023-08-31 04:08:49,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:08:49,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709929913] [2023-08-31 04:08:49,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:08:49,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:08:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:08:50,392 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-31 04:08:50,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:08:50,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709929913] [2023-08-31 04:08:50,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709929913] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:08:50,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072986565] [2023-08-31 04:08:50,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:08:50,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:08:50,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:08:50,393 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:08:50,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-31 04:08:50,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-31 04:08:50,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:08:50,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 99 conjunts are in the unsatisfiable core [2023-08-31 04:08:50,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:08:50,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-31 04:08:50,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 04:08:50,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 04:08:51,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:08:51,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:08:51,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:08:51,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:08:51,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:08:51,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:08:51,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:08:51,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:08:51,530 INFO L321 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2023-08-31 04:08:51,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 58 treesize of output 25 [2023-08-31 04:08:51,540 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 04:08:51,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:08:53,494 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:08:53,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 233 treesize of output 161 [2023-08-31 04:08:53,550 INFO L321 Elim1Store]: treesize reduction 106, result has 25.9 percent of original size [2023-08-31 04:08:53,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 592 treesize of output 549 [2023-08-31 04:08:53,584 INFO L321 Elim1Store]: treesize reduction 142, result has 0.7 percent of original size [2023-08-31 04:08:53,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 513 treesize of output 383 [2023-08-31 04:08:53,631 INFO L321 Elim1Store]: treesize reduction 142, result has 0.7 percent of original size [2023-08-31 04:08:53,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 362 treesize of output 297 [2023-08-31 04:08:54,061 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 47 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 04:08:54,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072986565] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:08:54,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:08:54,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 17] total 47 [2023-08-31 04:08:54,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062398180] [2023-08-31 04:08:54,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:08:54,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-08-31 04:08:54,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:08:54,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-08-31 04:08:54,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=2055, Unknown=4, NotChecked=0, Total=2352 [2023-08-31 04:08:54,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 211 [2023-08-31 04:08:54,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 704 places, 4155 transitions, 110673 flow. Second operand has 49 states, 49 states have (on average 62.40816326530612) internal successors, (3058), 49 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:54,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:08:54,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 211 [2023-08-31 04:08:54,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:09:07,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:09:08,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:09:11,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:09:13,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:09:15,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:09:24,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:09:27,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:09:30,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:09:35,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:09:38,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:09:40,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:09:42,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:09:44,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:09:48,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:09:56,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:09:59,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:08,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:11,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:16,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:18,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:36,673 WARN L222 SmtUtils]: Spent 12.09s on a formula simplification that was a NOOP. DAG size: 81 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:10:38,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:44,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:46,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:48,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:51,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:53,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:57,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:11:01,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:11:04,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:11:14,995 WARN L222 SmtUtils]: Spent 10.09s on a formula simplification that was a NOOP. DAG size: 81 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:11:17,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:11:23,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:11:34,009 WARN L222 SmtUtils]: Spent 10.09s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:11:36,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:11:38,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:11:44,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:11:47,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:11:52,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:11:55,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:12:05,999 WARN L222 SmtUtils]: Spent 9.07s on a formula simplification that was a NOOP. DAG size: 81 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:12:07,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:12:09,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:12:10,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:12:11,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:12:13,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:12:22,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:12:27,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:12:34,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:12:53,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:12:58,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:12:59,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:13:01,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:13:02,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:13:04,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:13:07,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:13:26,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:13:27,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:13:32,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:13:34,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:13:36,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:13:37,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:13:39,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:14:06,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:14:07,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] Killed by 15