./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_92-evilcollapse_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_92-evilcollapse_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 18:16:36,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 18:16:36,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 18:16:36,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 18:16:36,953 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 18:16:36,956 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 18:16:36,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 18:16:36,962 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 18:16:36,964 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 18:16:36,969 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 18:16:36,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 18:16:36,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 18:16:36,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 18:16:36,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 18:16:36,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 18:16:36,980 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 18:16:36,981 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 18:16:36,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 18:16:36,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 18:16:36,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 18:16:36,991 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 18:16:36,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 18:16:36,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 18:16:36,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 18:16:37,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 18:16:37,001 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 18:16:37,001 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 18:16:37,003 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 18:16:37,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 18:16:37,005 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 18:16:37,005 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 18:16:37,006 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 18:16:37,008 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 18:16:37,009 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 18:16:37,010 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 18:16:37,010 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 18:16:37,010 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 18:16:37,011 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 18:16:37,011 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 18:16:37,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 18:16:37,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 18:16:37,014 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 18:16:37,047 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 18:16:37,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 18:16:37,049 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 18:16:37,049 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 18:16:37,050 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 18:16:37,050 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 18:16:37,051 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 18:16:37,051 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 18:16:37,051 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 18:16:37,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 18:16:37,053 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 18:16:37,053 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 18:16:37,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 18:16:37,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 18:16:37,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 18:16:37,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 18:16:37,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 18:16:37,054 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 18:16:37,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 18:16:37,055 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 18:16:37,056 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 18:16:37,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 18:16:37,059 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 18:16:37,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 18:16:37,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:16:37,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 18:16:37,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 18:16:37,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 18:16:37,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 18:16:37,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 18:16:37,063 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 18:16:37,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 18:16:37,063 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 18:16:37,064 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 18:16:37,064 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 18:16:37,064 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 18:16:37,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 18:16:37,382 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 18:16:37,384 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 18:16:37,385 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 18:16:37,386 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 18:16:37,387 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_92-evilcollapse_racing.i [2023-08-30 18:16:38,632 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 18:16:38,887 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 18:16:38,888 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_92-evilcollapse_racing.i [2023-08-30 18:16:38,901 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61b495675/e609440aa9044ed7aa16a3de3b2fdb17/FLAGf34b6a887 [2023-08-30 18:16:38,918 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61b495675/e609440aa9044ed7aa16a3de3b2fdb17 [2023-08-30 18:16:38,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 18:16:38,922 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 18:16:38,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 18:16:38,924 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 18:16:38,931 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 18:16:38,932 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:16:38" (1/1) ... [2023-08-30 18:16:38,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3de69c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:38, skipping insertion in model container [2023-08-30 18:16:38,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:16:38" (1/1) ... [2023-08-30 18:16:38,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 18:16:38,990 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 18:16:39,337 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_92-evilcollapse_racing.i[47038,47051] [2023-08-30 18:16:39,354 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:16:39,356 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:16:39,357 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:16:39,358 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:16:39,387 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:16:39,406 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 18:16:39,457 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_92-evilcollapse_racing.i[47038,47051] [2023-08-30 18:16:39,464 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:16:39,464 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:16:39,464 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:16:39,464 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:16:39,474 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:16:39,525 INFO L208 MainTranslator]: Completed translation [2023-08-30 18:16:39,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:39 WrapperNode [2023-08-30 18:16:39,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 18:16:39,527 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 18:16:39,533 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 18:16:39,533 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 18:16:39,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:39" (1/1) ... [2023-08-30 18:16:39,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:39" (1/1) ... [2023-08-30 18:16:39,581 INFO L138 Inliner]: procedures = 278, calls = 51, calls flagged for inlining = 11, calls inlined = 12, statements flattened = 225 [2023-08-30 18:16:39,582 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 18:16:39,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 18:16:39,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 18:16:39,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 18:16:39,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:39" (1/1) ... [2023-08-30 18:16:39,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:39" (1/1) ... [2023-08-30 18:16:39,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:39" (1/1) ... [2023-08-30 18:16:39,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:39" (1/1) ... [2023-08-30 18:16:39,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:39" (1/1) ... [2023-08-30 18:16:39,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:39" (1/1) ... [2023-08-30 18:16:39,628 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:39" (1/1) ... [2023-08-30 18:16:39,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:39" (1/1) ... [2023-08-30 18:16:39,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 18:16:39,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 18:16:39,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 18:16:39,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 18:16:39,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:39" (1/1) ... [2023-08-30 18:16:39,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:16:39,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:16:39,690 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 18:16:39,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 18:16:39,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 18:16:39,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-30 18:16:39,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 18:16:39,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 18:16:39,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 18:16:39,717 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 18:16:39,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 18:16:39,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 18:16:39,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-30 18:16:39,717 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 18:16:39,717 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 18:16:39,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 18:16:39,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 18:16:39,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 18:16:39,719 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 18:16:39,890 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 18:16:39,895 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 18:16:40,320 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 18:16:40,337 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 18:16:40,337 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-08-30 18:16:40,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:16:40 BoogieIcfgContainer [2023-08-30 18:16:40,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 18:16:40,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 18:16:40,342 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 18:16:40,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 18:16:40,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:16:38" (1/3) ... [2023-08-30 18:16:40,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e3681c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:16:40, skipping insertion in model container [2023-08-30 18:16:40,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:39" (2/3) ... [2023-08-30 18:16:40,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e3681c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:16:40, skipping insertion in model container [2023-08-30 18:16:40,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:16:40" (3/3) ... [2023-08-30 18:16:40,347 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_92-evilcollapse_racing.i [2023-08-30 18:16:40,357 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 18:16:40,366 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 18:16:40,367 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 18:16:40,367 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 18:16:40,448 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 18:16:40,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 233 transitions, 474 flow [2023-08-30 18:16:40,625 INFO L130 PetriNetUnfolder]: 28/249 cut-off events. [2023-08-30 18:16:40,626 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-08-30 18:16:40,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 249 events. 28/249 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 387 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 134. Up to 4 conditions per place. [2023-08-30 18:16:40,632 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 233 transitions, 474 flow [2023-08-30 18:16:40,641 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 228 transitions, 461 flow [2023-08-30 18:16:40,645 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:16:40,665 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 206 places, 228 transitions, 461 flow [2023-08-30 18:16:40,667 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 206 places, 228 transitions, 461 flow [2023-08-30 18:16:40,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 228 transitions, 461 flow [2023-08-30 18:16:40,722 INFO L130 PetriNetUnfolder]: 27/244 cut-off events. [2023-08-30 18:16:40,723 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:16:40,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 244 events. 27/244 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 337 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 134. Up to 4 conditions per place. [2023-08-30 18:16:40,728 INFO L119 LiptonReduction]: Number of co-enabled transitions 3828 [2023-08-30 18:16:53,517 WARN L222 SmtUtils]: Spent 5.38s on a formula simplification that was a NOOP. DAG size: 180 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-30 18:16:59,991 WARN L222 SmtUtils]: Spent 6.47s on a formula simplification that was a NOOP. DAG size: 172 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-30 18:17:10,294 INFO L134 LiptonReduction]: Checked pairs total: 3792 [2023-08-30 18:17:10,295 INFO L136 LiptonReduction]: Total number of compositions: 237 [2023-08-30 18:17:10,315 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:17:10,321 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;@328f6ec6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:17:10,322 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 18:17:10,335 INFO L130 PetriNetUnfolder]: 8/28 cut-off events. [2023-08-30 18:17:10,335 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:17:10,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:17:10,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:17:10,336 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:17:10,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:17:10,341 INFO L85 PathProgramCache]: Analyzing trace with hash 395511225, now seen corresponding path program 1 times [2023-08-30 18:17:10,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:17:10,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688065605] [2023-08-30 18:17:10,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:17:10,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:17:10,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:17:10,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:17:10,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:17:10,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688065605] [2023-08-30 18:17:10,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688065605] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:17:10,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:17:10,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:17:10,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978916926] [2023-08-30 18:17:10,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:17:10,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:17:10,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:17:10,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:17:10,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:17:10,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 470 [2023-08-30 18:17:10,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 36 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:10,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:17:10,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 470 [2023-08-30 18:17:10,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:17:11,005 INFO L130 PetriNetUnfolder]: 48/113 cut-off events. [2023-08-30 18:17:11,006 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:17:11,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 113 events. 48/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 292 event pairs, 33 based on Foata normal form. 8/93 useless extension candidates. Maximal degree in co-relation 188. Up to 97 conditions per place. [2023-08-30 18:17:11,010 INFO L137 encePairwiseOnDemand]: 457/470 looper letters, 22 selfloop transitions, 2 changer transitions 1/29 dead transitions. [2023-08-30 18:17:11,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 29 transitions, 113 flow [2023-08-30 18:17:11,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:17:11,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:17:11,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 654 transitions. [2023-08-30 18:17:11,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46382978723404256 [2023-08-30 18:17:11,031 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 654 transitions. [2023-08-30 18:17:11,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 654 transitions. [2023-08-30 18:17:11,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:17:11,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 654 transitions. [2023-08-30 18:17:11,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.0) internal successors, (654), 3 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) [2023-08-30 18:17:11,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:11,050 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:11,052 INFO L175 Difference]: Start difference. First operand has 25 places, 36 transitions, 77 flow. Second operand 3 states and 654 transitions. [2023-08-30 18:17:11,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 29 transitions, 113 flow [2023-08-30 18:17:11,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 29 transitions, 113 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 18:17:11,061 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 67 flow [2023-08-30 18:17:11,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2023-08-30 18:17:11,065 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-08-30 18:17:11,066 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 67 flow [2023-08-30 18:17:11,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:11,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:17:11,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:17:11,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 18:17:11,067 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:17:11,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:17:11,068 INFO L85 PathProgramCache]: Analyzing trace with hash 343259915, now seen corresponding path program 1 times [2023-08-30 18:17:11,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:17:11,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922392395] [2023-08-30 18:17:11,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:17:11,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:17:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:17:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:17:11,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:17:11,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922392395] [2023-08-30 18:17:11,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922392395] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:17:11,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:17:11,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 18:17:11,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935635731] [2023-08-30 18:17:11,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:17:11,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:17:11,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:17:11,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:17:11,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:17:11,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 470 [2023-08-30 18:17:11,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:11,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:17:11,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 470 [2023-08-30 18:17:11,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:17:11,308 INFO L130 PetriNetUnfolder]: 45/108 cut-off events. [2023-08-30 18:17:11,308 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:17:11,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 108 events. 45/108 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 257 event pairs, 30 based on Foata normal form. 2/90 useless extension candidates. Maximal degree in co-relation 198. Up to 93 conditions per place. [2023-08-30 18:17:11,309 INFO L137 encePairwiseOnDemand]: 467/470 looper letters, 21 selfloop transitions, 2 changer transitions 0/27 dead transitions. [2023-08-30 18:17:11,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 27 transitions, 115 flow [2023-08-30 18:17:11,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:17:11,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:17:11,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 641 transitions. [2023-08-30 18:17:11,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4546099290780142 [2023-08-30 18:17:11,312 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 641 transitions. [2023-08-30 18:17:11,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 641 transitions. [2023-08-30 18:17:11,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:17:11,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 641 transitions. [2023-08-30 18:17:11,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:11,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:11,317 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:11,317 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 67 flow. Second operand 3 states and 641 transitions. [2023-08-30 18:17:11,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 27 transitions, 115 flow [2023-08-30 18:17:11,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 113 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:17:11,319 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 79 flow [2023-08-30 18:17:11,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2023-08-30 18:17:11,320 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-08-30 18:17:11,320 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 79 flow [2023-08-30 18:17:11,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:11,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:17:11,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:17:11,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 18:17:11,321 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:17:11,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:17:11,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1330266228, now seen corresponding path program 1 times [2023-08-30 18:17:11,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:17:11,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398597569] [2023-08-30 18:17:11,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:17:11,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:17:11,353 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 18:17:11,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512131126] [2023-08-30 18:17:11,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:17:11,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:17:11,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:17:11,356 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:17:11,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 18:17:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:17:11,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 18:17:11,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:17:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:17:11,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:17:11,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:17:11,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:17:11,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398597569] [2023-08-30 18:17:11,626 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 18:17:11,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512131126] [2023-08-30 18:17:11,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512131126] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:17:11,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:17:11,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-08-30 18:17:11,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078741755] [2023-08-30 18:17:11,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 18:17:11,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:17:11,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:17:11,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:17:11,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 18:17:11,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 470 [2023-08-30 18:17:11,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 79 flow. Second operand has 6 states, 6 states have (on average 207.33333333333334) internal successors, (1244), 6 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:11,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:17:11,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 470 [2023-08-30 18:17:11,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:17:12,016 INFO L130 PetriNetUnfolder]: 45/114 cut-off events. [2023-08-30 18:17:12,016 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 18:17:12,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 114 events. 45/114 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 270 event pairs, 30 based on Foata normal form. 6/100 useless extension candidates. Maximal degree in co-relation 205. Up to 93 conditions per place. [2023-08-30 18:17:12,018 INFO L137 encePairwiseOnDemand]: 467/470 looper letters, 21 selfloop transitions, 5 changer transitions 0/30 dead transitions. [2023-08-30 18:17:12,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 30 transitions, 143 flow [2023-08-30 18:17:12,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:17:12,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:17:12,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1258 transitions. [2023-08-30 18:17:12,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460992907801418 [2023-08-30 18:17:12,022 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1258 transitions. [2023-08-30 18:17:12,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1258 transitions. [2023-08-30 18:17:12,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:17:12,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1258 transitions. [2023-08-30 18:17:12,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 209.66666666666666) internal successors, (1258), 6 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:12,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:12,032 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:12,032 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 79 flow. Second operand 6 states and 1258 transitions. [2023-08-30 18:17:12,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 30 transitions, 143 flow [2023-08-30 18:17:12,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 30 transitions, 139 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 18:17:12,034 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 117 flow [2023-08-30 18:17:12,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-30 18:17:12,035 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 10 predicate places. [2023-08-30 18:17:12,035 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 117 flow [2023-08-30 18:17:12,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 207.33333333333334) internal successors, (1244), 6 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:12,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:17:12,037 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:17:12,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 18:17:12,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:17:12,243 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:17:12,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:17:12,244 INFO L85 PathProgramCache]: Analyzing trace with hash 647189323, now seen corresponding path program 2 times [2023-08-30 18:17:12,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:17:12,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899115183] [2023-08-30 18:17:12,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:17:12,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:17:12,301 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 18:17:12,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939850605] [2023-08-30 18:17:12,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:17:12,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:17:12,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:17:12,304 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:17:12,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 18:17:12,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:17:12,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:17:12,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 1134 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 18:17:12,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:17:12,686 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:17:12,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:17:12,741 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:17:12,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:17:12,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899115183] [2023-08-30 18:17:12,742 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 18:17:12,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939850605] [2023-08-30 18:17:12,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939850605] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:17:12,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:17:12,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-08-30 18:17:12,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504203494] [2023-08-30 18:17:12,743 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 18:17:12,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 18:17:12,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:17:12,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 18:17:12,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-30 18:17:12,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 470 [2023-08-30 18:17:12,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 117 flow. Second operand has 12 states, 12 states have (on average 206.66666666666666) internal successors, (2480), 12 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:12,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:17:12,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 470 [2023-08-30 18:17:12,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:17:13,231 INFO L130 PetriNetUnfolder]: 45/126 cut-off events. [2023-08-30 18:17:13,231 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-08-30 18:17:13,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 126 events. 45/126 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 316 event pairs, 30 based on Foata normal form. 12/118 useless extension candidates. Maximal degree in co-relation 201. Up to 93 conditions per place. [2023-08-30 18:17:13,232 INFO L137 encePairwiseOnDemand]: 467/470 looper letters, 21 selfloop transitions, 11 changer transitions 0/36 dead transitions. [2023-08-30 18:17:13,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 36 transitions, 217 flow [2023-08-30 18:17:13,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 18:17:13,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 18:17:13,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2497 transitions. [2023-08-30 18:17:13,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4427304964539007 [2023-08-30 18:17:13,239 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2497 transitions. [2023-08-30 18:17:13,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2497 transitions. [2023-08-30 18:17:13,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:17:13,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2497 transitions. [2023-08-30 18:17:13,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 208.08333333333334) internal successors, (2497), 12 states have internal predecessors, (2497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:13,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 470.0) internal successors, (6110), 13 states have internal predecessors, (6110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:13,256 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 470.0) internal successors, (6110), 13 states have internal predecessors, (6110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:13,256 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 117 flow. Second operand 12 states and 2497 transitions. [2023-08-30 18:17:13,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 36 transitions, 217 flow [2023-08-30 18:17:13,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 36 transitions, 203 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 18:17:13,259 INFO L231 Difference]: Finished difference. Result has 51 places, 36 transitions, 199 flow [2023-08-30 18:17:13,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=199, PETRI_PLACES=51, PETRI_TRANSITIONS=36} [2023-08-30 18:17:13,260 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 26 predicate places. [2023-08-30 18:17:13,260 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 36 transitions, 199 flow [2023-08-30 18:17:13,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 206.66666666666666) internal successors, (2480), 12 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:13,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:17:13,262 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:17:13,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 18:17:13,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-30 18:17:13,469 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:17:13,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:17:13,470 INFO L85 PathProgramCache]: Analyzing trace with hash -760661077, now seen corresponding path program 3 times [2023-08-30 18:17:13,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:17:13,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597771094] [2023-08-30 18:17:13,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:17:13,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:17:13,593 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 18:17:13,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [376653981] [2023-08-30 18:17:13,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:17:13,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:17:13,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:17:13,595 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:17:13,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 18:17:14,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 18:17:14,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:17:14,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 18:17:14,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:17:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 18:17:14,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:17:14,074 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 18:17:14,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:17:14,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597771094] [2023-08-30 18:17:14,075 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 18:17:14,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376653981] [2023-08-30 18:17:14,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376653981] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:17:14,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:17:14,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-08-30 18:17:14,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795553967] [2023-08-30 18:17:14,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 18:17:14,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:17:14,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:17:14,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:17:14,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 18:17:14,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 470 [2023-08-30 18:17:14,101 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 36 transitions, 199 flow. Second operand has 6 states, 6 states have (on average 207.66666666666666) internal successors, (1246), 6 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:14,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:17:14,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 470 [2023-08-30 18:17:14,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:17:14,441 INFO L130 PetriNetUnfolder]: 47/153 cut-off events. [2023-08-30 18:17:14,442 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2023-08-30 18:17:14,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 508 conditions, 153 events. 47/153 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 254 event pairs, 30 based on Foata normal form. 3/136 useless extension candidates. Maximal degree in co-relation 310. Up to 87 conditions per place. [2023-08-30 18:17:14,443 INFO L137 encePairwiseOnDemand]: 466/470 looper letters, 65 selfloop transitions, 6 changer transitions 0/75 dead transitions. [2023-08-30 18:17:14,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 75 transitions, 690 flow [2023-08-30 18:17:14,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:17:14,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:17:14,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1264 transitions. [2023-08-30 18:17:14,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482269503546099 [2023-08-30 18:17:14,447 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1264 transitions. [2023-08-30 18:17:14,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1264 transitions. [2023-08-30 18:17:14,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:17:14,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1264 transitions. [2023-08-30 18:17:14,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 210.66666666666666) internal successors, (1264), 6 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:14,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:14,455 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:14,455 INFO L175 Difference]: Start difference. First operand has 51 places, 36 transitions, 199 flow. Second operand 6 states and 1264 transitions. [2023-08-30 18:17:14,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 75 transitions, 690 flow [2023-08-30 18:17:14,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 75 transitions, 496 flow, removed 76 selfloop flow, removed 5 redundant places. [2023-08-30 18:17:14,463 INFO L231 Difference]: Finished difference. Result has 55 places, 39 transitions, 234 flow [2023-08-30 18:17:14,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=234, PETRI_PLACES=55, PETRI_TRANSITIONS=39} [2023-08-30 18:17:14,464 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 30 predicate places. [2023-08-30 18:17:14,464 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 39 transitions, 234 flow [2023-08-30 18:17:14,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 207.66666666666666) internal successors, (1246), 6 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:14,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:17:14,466 INFO L208 CegarLoopForPetriNet]: trace histogram [40, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:17:14,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 18:17:14,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:17:14,669 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:17:14,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:17:14,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1059699585, now seen corresponding path program 4 times [2023-08-30 18:17:14,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:17:14,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792573254] [2023-08-30 18:17:14,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:17:14,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:17:15,109 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 18:17:15,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [24763840] [2023-08-30 18:17:15,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:17:15,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:17:15,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:17:15,111 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:17:15,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 18:17:17,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:17:17,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:17:17,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 9564 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 18:17:17,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:17:17,693 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2023-08-30 18:17:17,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:17:17,906 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2023-08-30 18:17:17,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:17:17,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792573254] [2023-08-30 18:17:17,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 18:17:17,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24763840] [2023-08-30 18:17:17,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24763840] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:17:17,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:17:17,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-08-30 18:17:17,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80381747] [2023-08-30 18:17:17,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 18:17:17,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 18:17:17,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:17:17,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 18:17:17,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-08-30 18:17:17,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 470 [2023-08-30 18:17:17,978 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 39 transitions, 234 flow. Second operand has 24 states, 24 states have (on average 206.45833333333334) internal successors, (4955), 24 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:17,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:17:17,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 470 [2023-08-30 18:17:17,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:17:19,158 INFO L130 PetriNetUnfolder]: 47/201 cut-off events. [2023-08-30 18:17:19,158 INFO L131 PetriNetUnfolder]: For 3489/3489 co-relation queries the response was YES. [2023-08-30 18:17:19,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 624 conditions, 201 events. 47/201 cut-off events. For 3489/3489 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 254 event pairs, 30 based on Foata normal form. 48/229 useless extension candidates. Maximal degree in co-relation 423. Up to 99 conditions per place. [2023-08-30 18:17:19,159 INFO L137 encePairwiseOnDemand]: 467/470 looper letters, 23 selfloop transitions, 24 changer transitions 0/51 dead transitions. [2023-08-30 18:17:19,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 51 transitions, 400 flow [2023-08-30 18:17:19,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 18:17:19,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 18:17:19,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4975 transitions. [2023-08-30 18:17:19,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44104609929078015 [2023-08-30 18:17:19,173 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4975 transitions. [2023-08-30 18:17:19,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4975 transitions. [2023-08-30 18:17:19,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:17:19,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4975 transitions. [2023-08-30 18:17:19,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 207.29166666666666) internal successors, (4975), 24 states have internal predecessors, (4975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:19,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 470.0) internal successors, (11750), 25 states have internal predecessors, (11750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:19,206 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 470.0) internal successors, (11750), 25 states have internal predecessors, (11750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:19,206 INFO L175 Difference]: Start difference. First operand has 55 places, 39 transitions, 234 flow. Second operand 24 states and 4975 transitions. [2023-08-30 18:17:19,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 51 transitions, 400 flow [2023-08-30 18:17:19,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 51 transitions, 392 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 18:17:19,211 INFO L231 Difference]: Finished difference. Result has 89 places, 51 transitions, 468 flow [2023-08-30 18:17:19,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=468, PETRI_PLACES=89, PETRI_TRANSITIONS=51} [2023-08-30 18:17:19,213 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 64 predicate places. [2023-08-30 18:17:19,213 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 51 transitions, 468 flow [2023-08-30 18:17:19,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 206.45833333333334) internal successors, (4955), 24 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:19,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:17:19,228 INFO L208 CegarLoopForPetriNet]: trace histogram [88, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:17:19,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 18:17:19,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:17:19,454 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:17:19,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:17:19,455 INFO L85 PathProgramCache]: Analyzing trace with hash -211616639, now seen corresponding path program 5 times [2023-08-30 18:17:19,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:17:19,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019894100] [2023-08-30 18:17:19,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:17:19,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:17:20,381 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 18:17:20,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912268120] [2023-08-30 18:17:20,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:17:20,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:17:20,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:17:20,389 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:17:20,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process Killed by 15