./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-min-max-1.wvr.c --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/weaver/parallel-min-max-1.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 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 --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 19:37:40,742 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 19:37:40,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 19:37:40,788 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 19:37:40,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 19:37:40,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 19:37:40,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 19:37:40,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 19:37:40,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 19:37:40,801 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 19:37:40,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 19:37:40,804 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 19:37:40,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 19:37:40,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 19:37:40,807 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 19:37:40,811 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 19:37:40,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 19:37:40,813 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 19:37:40,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 19:37:40,818 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 19:37:40,819 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 19:37:40,820 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 19:37:40,821 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 19:37:40,822 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 19:37:40,828 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 19:37:40,829 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 19:37:40,829 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 19:37:40,830 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 19:37:40,831 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 19:37:40,831 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 19:37:40,832 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 19:37:40,833 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 19:37:40,834 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 19:37:40,835 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 19:37:40,836 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 19:37:40,836 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 19:37:40,836 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 19:37:40,836 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 19:37:40,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 19:37:40,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 19:37:40,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 19:37:40,839 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 19:37:40,872 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 19:37:40,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 19:37:40,873 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 19:37:40,873 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 19:37:40,874 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 19:37:40,874 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 19:37:40,875 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 19:37:40,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 19:37:40,875 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 19:37:40,875 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 19:37:40,876 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 19:37:40,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 19:37:40,876 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 19:37:40,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 19:37:40,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 19:37:40,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 19:37:40,877 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 19:37:40,877 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 19:37:40,877 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 19:37:40,878 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 19:37:40,878 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 19:37:40,878 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 19:37:40,878 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 19:37:40,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 19:37:40,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:37:40,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 19:37:40,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 19:37:40,879 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 19:37:40,879 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 19:37:40,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 19:37:40,880 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 19:37:40,880 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 19:37:40,880 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 19:37:40,880 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 19:37:40,880 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 19:37:40,881 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 19:37:41,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 19:37:41,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 19:37:41,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 19:37:41,222 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 19:37:41,222 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 19:37:41,224 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-min-max-1.wvr.c [2023-08-30 19:37:42,489 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 19:37:42,720 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 19:37:42,721 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-min-max-1.wvr.c [2023-08-30 19:37:42,731 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0c7f007a/1e87b7e96469496bb47a94485043ee4d/FLAGed1ed8c41 [2023-08-30 19:37:43,059 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0c7f007a/1e87b7e96469496bb47a94485043ee4d [2023-08-30 19:37:43,061 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 19:37:43,062 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 19:37:43,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 19:37:43,063 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 19:37:43,067 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 19:37:43,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:37:43" (1/1) ... [2023-08-30 19:37:43,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34adbf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:37:43, skipping insertion in model container [2023-08-30 19:37:43,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:37:43" (1/1) ... [2023-08-30 19:37:43,074 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 19:37:43,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 19:37:43,293 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/parallel-min-max-1.wvr.c[3057,3070] [2023-08-30 19:37:43,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:37:43,324 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 19:37:43,361 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/parallel-min-max-1.wvr.c[3057,3070] [2023-08-30 19:37:43,370 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:37:43,378 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 19:37:43,380 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 19:37:43,386 INFO L208 MainTranslator]: Completed translation [2023-08-30 19:37:43,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:37:43 WrapperNode [2023-08-30 19:37:43,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 19:37:43,389 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 19:37:43,389 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 19:37:43,389 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 19:37:43,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:37:43" (1/1) ... [2023-08-30 19:37:43,415 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:37:43" (1/1) ... [2023-08-30 19:37:43,449 INFO L138 Inliner]: procedures = 25, calls = 53, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 129 [2023-08-30 19:37:43,450 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 19:37:43,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 19:37:43,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 19:37:43,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 19:37:43,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:37:43" (1/1) ... [2023-08-30 19:37:43,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:37:43" (1/1) ... [2023-08-30 19:37:43,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:37:43" (1/1) ... [2023-08-30 19:37:43,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:37:43" (1/1) ... [2023-08-30 19:37:43,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:37:43" (1/1) ... [2023-08-30 19:37:43,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:37:43" (1/1) ... [2023-08-30 19:37:43,522 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:37:43" (1/1) ... [2023-08-30 19:37:43,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:37:43" (1/1) ... [2023-08-30 19:37:43,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 19:37:43,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 19:37:43,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 19:37:43,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 19:37:43,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:37:43" (1/1) ... [2023-08-30 19:37:43,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:37:43,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:37:43,560 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 19:37:43,583 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 19:37:43,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 19:37:43,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 19:37:43,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 19:37:43,598 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 19:37:43,598 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 19:37:43,598 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 19:37:43,598 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 19:37:43,598 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 19:37:43,599 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 19:37:43,599 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 19:37:43,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 19:37:43,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 19:37:43,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 19:37:43,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 19:37:43,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 19:37:43,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 19:37:43,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 19:37:43,601 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 19:37:43,713 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 19:37:43,715 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 19:37:44,022 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 19:37:44,107 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 19:37:44,107 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 19:37:44,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:37:44 BoogieIcfgContainer [2023-08-30 19:37:44,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 19:37:44,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 19:37:44,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 19:37:44,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 19:37:44,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:37:43" (1/3) ... [2023-08-30 19:37:44,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3452d34d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:37:44, skipping insertion in model container [2023-08-30 19:37:44,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:37:43" (2/3) ... [2023-08-30 19:37:44,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3452d34d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:37:44, skipping insertion in model container [2023-08-30 19:37:44,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:37:44" (3/3) ... [2023-08-30 19:37:44,116 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-min-max-1.wvr.c [2023-08-30 19:37:44,122 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 19:37:44,130 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 19:37:44,130 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 19:37:44,130 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 19:37:44,199 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 19:37:44,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 169 transitions, 362 flow [2023-08-30 19:37:44,295 INFO L130 PetriNetUnfolder]: 12/166 cut-off events. [2023-08-30 19:37:44,295 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:37:44,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 166 events. 12/166 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 103 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 137. Up to 2 conditions per place. [2023-08-30 19:37:44,301 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 169 transitions, 362 flow [2023-08-30 19:37:44,305 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 156 transitions, 330 flow [2023-08-30 19:37:44,307 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 19:37:44,315 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 156 transitions, 330 flow [2023-08-30 19:37:44,318 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 156 transitions, 330 flow [2023-08-30 19:37:44,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 156 transitions, 330 flow [2023-08-30 19:37:44,357 INFO L130 PetriNetUnfolder]: 12/156 cut-off events. [2023-08-30 19:37:44,357 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:37:44,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 156 events. 12/156 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 102 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 137. Up to 2 conditions per place. [2023-08-30 19:37:44,360 INFO L119 LiptonReduction]: Number of co-enabled transitions 1134 [2023-08-30 19:37:49,743 INFO L134 LiptonReduction]: Checked pairs total: 1738 [2023-08-30 19:37:49,743 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-08-30 19:37:49,755 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 19:37:49,760 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;@53f87f24, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 19:37:49,761 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 19:37:49,766 INFO L130 PetriNetUnfolder]: 3/23 cut-off events. [2023-08-30 19:37:49,767 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:37:49,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:37:49,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:37:49,768 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:37:49,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:37:49,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1074919772, now seen corresponding path program 1 times [2023-08-30 19:37:49,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:37:49,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865343107] [2023-08-30 19:37:49,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:37:49,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:37:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:37:50,171 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 19:37:50,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:37:50,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865343107] [2023-08-30 19:37:50,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865343107] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:37:50,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:37:50,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:37:50,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700279992] [2023-08-30 19:37:50,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:37:50,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:37:50,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:37:50,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:37:50,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:37:50,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 331 [2023-08-30 19:37:50,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 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 19:37:50,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:37:50,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 331 [2023-08-30 19:37:50,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:37:50,377 INFO L130 PetriNetUnfolder]: 282/438 cut-off events. [2023-08-30 19:37:50,377 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-08-30 19:37:50,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 944 conditions, 438 events. 282/438 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1311 event pairs, 173 based on Foata normal form. 0/377 useless extension candidates. Maximal degree in co-relation 800. Up to 356 conditions per place. [2023-08-30 19:37:50,386 INFO L137 encePairwiseOnDemand]: 327/331 looper letters, 32 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-08-30 19:37:50,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 164 flow [2023-08-30 19:37:50,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:37:50,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:37:50,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 616 transitions. [2023-08-30 19:37:50,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4652567975830816 [2023-08-30 19:37:50,408 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 616 transitions. [2023-08-30 19:37:50,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 616 transitions. [2023-08-30 19:37:50,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:37:50,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 616 transitions. [2023-08-30 19:37:50,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 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 19:37:50,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 331.0) internal successors, (1655), 5 states have internal predecessors, (1655), 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 19:37:50,426 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 331.0) internal successors, (1655), 5 states have internal predecessors, (1655), 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 19:37:50,428 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 66 flow. Second operand 4 states and 616 transitions. [2023-08-30 19:37:50,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 164 flow [2023-08-30 19:37:50,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 148 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 19:37:50,433 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 68 flow [2023-08-30 19:37:50,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2023-08-30 19:37:50,437 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -2 predicate places. [2023-08-30 19:37:50,437 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 68 flow [2023-08-30 19:37:50,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 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 19:37:50,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:37:50,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:37:50,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 19:37:50,439 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:37:50,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:37:50,439 INFO L85 PathProgramCache]: Analyzing trace with hash 725544040, now seen corresponding path program 1 times [2023-08-30 19:37:50,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:37:50,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249970058] [2023-08-30 19:37:50,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:37:50,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:37:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:37:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:37:50,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:37:50,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249970058] [2023-08-30 19:37:50,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249970058] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:37:50,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:37:50,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:37:50,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593934435] [2023-08-30 19:37:50,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:37:50,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:37:50,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:37:50,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:37:50,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:37:50,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 331 [2023-08-30 19:37:50,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 150.5) internal successors, (602), 4 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) [2023-08-30 19:37:50,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:37:50,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 331 [2023-08-30 19:37:50,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:37:50,744 INFO L130 PetriNetUnfolder]: 344/532 cut-off events. [2023-08-30 19:37:50,745 INFO L131 PetriNetUnfolder]: For 152/152 co-relation queries the response was YES. [2023-08-30 19:37:50,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1270 conditions, 532 events. 344/532 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1709 event pairs, 221 based on Foata normal form. 0/465 useless extension candidates. Maximal degree in co-relation 397. Up to 438 conditions per place. [2023-08-30 19:37:50,748 INFO L137 encePairwiseOnDemand]: 327/331 looper letters, 34 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2023-08-30 19:37:50,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 37 transitions, 178 flow [2023-08-30 19:37:50,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:37:50,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:37:50,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 616 transitions. [2023-08-30 19:37:50,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4652567975830816 [2023-08-30 19:37:50,751 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 616 transitions. [2023-08-30 19:37:50,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 616 transitions. [2023-08-30 19:37:50,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:37:50,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 616 transitions. [2023-08-30 19:37:50,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 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 19:37:50,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 331.0) internal successors, (1655), 5 states have internal predecessors, (1655), 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 19:37:50,756 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 331.0) internal successors, (1655), 5 states have internal predecessors, (1655), 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 19:37:50,757 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 68 flow. Second operand 4 states and 616 transitions. [2023-08-30 19:37:50,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 37 transitions, 178 flow [2023-08-30 19:37:50,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 37 transitions, 168 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 19:37:50,759 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 76 flow [2023-08-30 19:37:50,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=76, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-08-30 19:37:50,760 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2023-08-30 19:37:50,760 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 76 flow [2023-08-30 19:37:50,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.5) internal successors, (602), 4 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) [2023-08-30 19:37:50,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:37:50,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:37:50,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 19:37:50,761 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:37:50,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:37:50,762 INFO L85 PathProgramCache]: Analyzing trace with hash -512809655, now seen corresponding path program 1 times [2023-08-30 19:37:50,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:37:50,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740175931] [2023-08-30 19:37:50,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:37:50,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:37:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:37:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 19:37:50,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:37:50,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740175931] [2023-08-30 19:37:50,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740175931] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:37:50,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:37:50,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 19:37:50,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10922465] [2023-08-30 19:37:50,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:37:50,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 19:37:50,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:37:50,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 19:37:50,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 19:37:50,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 331 [2023-08-30 19:37:50,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 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 19:37:50,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:37:50,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 331 [2023-08-30 19:37:50,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:37:50,960 INFO L130 PetriNetUnfolder]: 344/533 cut-off events. [2023-08-30 19:37:50,960 INFO L131 PetriNetUnfolder]: For 203/203 co-relation queries the response was YES. [2023-08-30 19:37:50,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1365 conditions, 533 events. 344/533 cut-off events. For 203/203 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1621 event pairs, 277 based on Foata normal form. 0/466 useless extension candidates. Maximal degree in co-relation 469. Up to 533 conditions per place. [2023-08-30 19:37:50,964 INFO L137 encePairwiseOnDemand]: 328/331 looper letters, 25 selfloop transitions, 2 changer transitions 0/27 dead transitions. [2023-08-30 19:37:50,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 132 flow [2023-08-30 19:37:50,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 19:37:50,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 19:37:50,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2023-08-30 19:37:50,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46727089627391744 [2023-08-30 19:37:50,966 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2023-08-30 19:37:50,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2023-08-30 19:37:50,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:37:50,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2023-08-30 19:37:50,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 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 19:37:50,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 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 19:37:50,970 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 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 19:37:50,971 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 76 flow. Second operand 3 states and 464 transitions. [2023-08-30 19:37:50,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 132 flow [2023-08-30 19:37:50,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 27 transitions, 126 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 19:37:50,972 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 82 flow [2023-08-30 19:37:50,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=29, 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=82, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-08-30 19:37:50,973 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2023-08-30 19:37:50,973 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 82 flow [2023-08-30 19:37:50,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 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 19:37:50,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:37:50,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:37:50,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 19:37:50,975 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:37:50,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:37:50,975 INFO L85 PathProgramCache]: Analyzing trace with hash -599166117, now seen corresponding path program 1 times [2023-08-30 19:37:50,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:37:50,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610837392] [2023-08-30 19:37:50,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:37:50,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:37:51,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:37:51,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:37:51,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:37:51,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610837392] [2023-08-30 19:37:51,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610837392] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:37:51,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237140575] [2023-08-30 19:37:51,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:37:51,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:37:51,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:37:51,377 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 19:37:51,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 19:37:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:37:51,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 19:37:51,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:37:51,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-30 19:37:51,856 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:37:51,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 61 [2023-08-30 19:37:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:37:51,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:37:52,145 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:37:52,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 65 [2023-08-30 19:37:52,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:37:52,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237140575] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:37:52,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:37:52,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 19:37:52,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750241257] [2023-08-30 19:37:52,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:37:52,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 19:37:52,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:37:52,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 19:37:52,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-08-30 19:37:52,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 331 [2023-08-30 19:37:52,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 82 flow. Second operand has 11 states, 11 states have (on average 142.0) internal successors, (1562), 11 states have internal predecessors, (1562), 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 19:37:52,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:37:52,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 331 [2023-08-30 19:37:52,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:37:53,517 INFO L130 PetriNetUnfolder]: 1268/1991 cut-off events. [2023-08-30 19:37:53,518 INFO L131 PetriNetUnfolder]: For 406/406 co-relation queries the response was YES. [2023-08-30 19:37:53,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4953 conditions, 1991 events. 1268/1991 cut-off events. For 406/406 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9306 event pairs, 162 based on Foata normal form. 4/1699 useless extension candidates. Maximal degree in co-relation 4940. Up to 506 conditions per place. [2023-08-30 19:37:53,526 INFO L137 encePairwiseOnDemand]: 322/331 looper letters, 74 selfloop transitions, 14 changer transitions 124/212 dead transitions. [2023-08-30 19:37:53,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 212 transitions, 1043 flow [2023-08-30 19:37:53,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 19:37:53,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 19:37:53,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2803 transitions. [2023-08-30 19:37:53,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4456988392431229 [2023-08-30 19:37:53,533 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2803 transitions. [2023-08-30 19:37:53,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2803 transitions. [2023-08-30 19:37:53,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:37:53,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2803 transitions. [2023-08-30 19:37:53,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 147.52631578947367) internal successors, (2803), 19 states have internal predecessors, (2803), 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 19:37:53,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 331.0) internal successors, (6620), 20 states have internal predecessors, (6620), 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 19:37:53,552 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 331.0) internal successors, (6620), 20 states have internal predecessors, (6620), 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 19:37:53,552 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 82 flow. Second operand 19 states and 2803 transitions. [2023-08-30 19:37:53,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 212 transitions, 1043 flow [2023-08-30 19:37:53,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 212 transitions, 1039 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 19:37:53,561 INFO L231 Difference]: Finished difference. Result has 63 places, 39 transitions, 199 flow [2023-08-30 19:37:53,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=199, PETRI_PLACES=63, PETRI_TRANSITIONS=39} [2023-08-30 19:37:53,562 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 32 predicate places. [2023-08-30 19:37:53,562 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 39 transitions, 199 flow [2023-08-30 19:37:53,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 142.0) internal successors, (1562), 11 states have internal predecessors, (1562), 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 19:37:53,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:37:53,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:37:53,569 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 19:37:53,769 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 [2023-08-30 19:37:53,770 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:37:53,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:37:53,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1758554723, now seen corresponding path program 2 times [2023-08-30 19:37:53,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:37:53,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110074949] [2023-08-30 19:37:53,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:37:53,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:37:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:37:54,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:37:54,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:37:54,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110074949] [2023-08-30 19:37:54,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110074949] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:37:54,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:37:54,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 19:37:54,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126730181] [2023-08-30 19:37:54,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:37:54,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 19:37:54,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:37:54,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 19:37:54,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 19:37:54,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 331 [2023-08-30 19:37:54,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 39 transitions, 199 flow. Second operand has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 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 19:37:54,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:37:54,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 331 [2023-08-30 19:37:54,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:37:54,790 INFO L130 PetriNetUnfolder]: 1073/1714 cut-off events. [2023-08-30 19:37:54,791 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-08-30 19:37:54,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6489 conditions, 1714 events. 1073/1714 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8071 event pairs, 132 based on Foata normal form. 4/1584 useless extension candidates. Maximal degree in co-relation 6457. Up to 602 conditions per place. [2023-08-30 19:37:54,802 INFO L137 encePairwiseOnDemand]: 325/331 looper letters, 46 selfloop transitions, 5 changer transitions 41/92 dead transitions. [2023-08-30 19:37:54,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 92 transitions, 633 flow [2023-08-30 19:37:54,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:37:54,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:37:54,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 964 transitions. [2023-08-30 19:37:54,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160552438498058 [2023-08-30 19:37:54,807 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 964 transitions. [2023-08-30 19:37:54,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 964 transitions. [2023-08-30 19:37:54,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:37:54,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 964 transitions. [2023-08-30 19:37:54,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 137.71428571428572) internal successors, (964), 7 states have internal predecessors, (964), 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 19:37:54,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 331.0) internal successors, (2648), 8 states have internal predecessors, (2648), 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 19:37:54,813 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 331.0) internal successors, (2648), 8 states have internal predecessors, (2648), 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 19:37:54,814 INFO L175 Difference]: Start difference. First operand has 63 places, 39 transitions, 199 flow. Second operand 7 states and 964 transitions. [2023-08-30 19:37:54,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 92 transitions, 633 flow [2023-08-30 19:37:54,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 92 transitions, 589 flow, removed 22 selfloop flow, removed 7 redundant places. [2023-08-30 19:37:54,840 INFO L231 Difference]: Finished difference. Result has 54 places, 34 transitions, 173 flow [2023-08-30 19:37:54,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=173, PETRI_PLACES=54, PETRI_TRANSITIONS=34} [2023-08-30 19:37:54,842 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 23 predicate places. [2023-08-30 19:37:54,842 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 34 transitions, 173 flow [2023-08-30 19:37:54,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 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 19:37:54,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:37:54,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:37:54,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 19:37:54,843 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:37:54,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:37:54,844 INFO L85 PathProgramCache]: Analyzing trace with hash -115692411, now seen corresponding path program 3 times [2023-08-30 19:37:54,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:37:54,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548837910] [2023-08-30 19:37:54,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:37:54,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:37:54,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:37:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:37:55,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:37:55,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548837910] [2023-08-30 19:37:55,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548837910] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:37:55,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358093439] [2023-08-30 19:37:55,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:37:55,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:37:55,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:37:55,325 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 19:37:55,352 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 19:37:55,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:37:55,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:37:55,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 19:37:55,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:37:55,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:37:55,542 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 [2023-08-30 19:37:55,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-30 19:37:55,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:37:55,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:37:55,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2023-08-30 19:38:02,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:38:02,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358093439] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:38:02,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:38:02,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10] total 26 [2023-08-30 19:38:02,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278177168] [2023-08-30 19:38:02,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:38:02,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 19:38:02,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:38:02,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 19:38:02,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=598, Unknown=11, NotChecked=0, Total=756 [2023-08-30 19:38:04,093 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] [2023-08-30 19:38:06,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:38:08,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:38:10,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:38:12,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:38:14,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:38:16,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:38:18,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:38:20,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:38:22,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:38:24,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:38:26,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:38:28,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:38:30,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:38:32,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:38:35,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:38:37,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:38:37,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 331 [2023-08-30 19:38:37,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 34 transitions, 173 flow. Second operand has 28 states, 28 states have (on average 112.57142857142857) internal successors, (3152), 28 states have internal predecessors, (3152), 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 19:38:37,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:38:37,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 331 [2023-08-30 19:38:37,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:38:38,877 INFO L130 PetriNetUnfolder]: 1727/2822 cut-off events. [2023-08-30 19:38:38,877 INFO L131 PetriNetUnfolder]: For 6136/6136 co-relation queries the response was YES. [2023-08-30 19:38:38,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9837 conditions, 2822 events. 1727/2822 cut-off events. For 6136/6136 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15210 event pairs, 111 based on Foata normal form. 4/2558 useless extension candidates. Maximal degree in co-relation 9806. Up to 775 conditions per place. [2023-08-30 19:38:38,891 INFO L137 encePairwiseOnDemand]: 320/331 looper letters, 103 selfloop transitions, 26 changer transitions 157/286 dead transitions. [2023-08-30 19:38:38,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 286 transitions, 1863 flow [2023-08-30 19:38:38,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 19:38:38,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 19:38:38,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3464 transitions. [2023-08-30 19:38:38,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36087092405458904 [2023-08-30 19:38:38,903 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3464 transitions. [2023-08-30 19:38:38,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3464 transitions. [2023-08-30 19:38:38,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:38:38,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3464 transitions. [2023-08-30 19:38:38,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 119.44827586206897) internal successors, (3464), 29 states have internal predecessors, (3464), 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 19:38:38,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 331.0) internal successors, (9930), 30 states have internal predecessors, (9930), 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 19:38:38,928 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 331.0) internal successors, (9930), 30 states have internal predecessors, (9930), 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 19:38:38,928 INFO L175 Difference]: Start difference. First operand has 54 places, 34 transitions, 173 flow. Second operand 29 states and 3464 transitions. [2023-08-30 19:38:38,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 286 transitions, 1863 flow [2023-08-30 19:38:38,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 286 transitions, 1748 flow, removed 52 selfloop flow, removed 7 redundant places. [2023-08-30 19:38:38,939 INFO L231 Difference]: Finished difference. Result has 93 places, 49 transitions, 401 flow [2023-08-30 19:38:38,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=401, PETRI_PLACES=93, PETRI_TRANSITIONS=49} [2023-08-30 19:38:38,941 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 62 predicate places. [2023-08-30 19:38:38,941 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 49 transitions, 401 flow [2023-08-30 19:38:38,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 112.57142857142857) internal successors, (3152), 28 states have internal predecessors, (3152), 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 19:38:38,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:38:38,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:38:38,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 19:38:39,148 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,SelfDestructingSolverStorable5 [2023-08-30 19:38:39,148 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:38:39,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:38:39,149 INFO L85 PathProgramCache]: Analyzing trace with hash 157009709, now seen corresponding path program 4 times [2023-08-30 19:38:39,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:38:39,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193267846] [2023-08-30 19:38:39,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:38:39,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:38:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:38:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 19:38:39,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:38:39,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193267846] [2023-08-30 19:38:39,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193267846] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:38:39,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772909181] [2023-08-30 19:38:39,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:38:39,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:38:39,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:38:39,618 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 19:38:39,621 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 19:38:39,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:38:39,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:38:39,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 19:38:39,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:38:39,748 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 19:38:39,749 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 96 treesize of output 90 [2023-08-30 19:38:39,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2023-08-30 19:38:39,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 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 [2023-08-30 19:38:39,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2023-08-30 19:38:39,913 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 [2023-08-30 19:38:39,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-30 19:38:40,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:38:40,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:38:42,245 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (<= c_~min~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_225) c_~A~0.base) c_~A~0.offset))) is different from false [2023-08-30 19:38:42,260 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_223 (Array Int Int)) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (< (select (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (+ (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_223) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 1))) is different from false [2023-08-30 19:38:42,269 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:38:42,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 41 [2023-08-30 19:38:42,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 423 treesize of output 417 [2023-08-30 19:38:42,287 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 246 treesize of output 232 [2023-08-30 19:38:42,293 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 232 treesize of output 224 [2023-08-30 19:38:42,303 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 126 treesize of output 122 [2023-08-30 19:38:42,308 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 220 treesize of output 204 [2023-08-30 19:38:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-08-30 19:38:42,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772909181] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:38:42,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:38:42,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 22 [2023-08-30 19:38:42,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932087953] [2023-08-30 19:38:42,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:38:42,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 19:38:42,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:38:42,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 19:38:42,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=374, Unknown=9, NotChecked=82, Total=552 [2023-08-30 19:38:42,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 331 [2023-08-30 19:38:42,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 49 transitions, 401 flow. Second operand has 24 states, 24 states have (on average 106.95833333333333) internal successors, (2567), 24 states have internal predecessors, (2567), 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 19:38:42,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:38:42,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 331 [2023-08-30 19:38:42,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:38:45,595 INFO L130 PetriNetUnfolder]: 1469/2486 cut-off events. [2023-08-30 19:38:45,595 INFO L131 PetriNetUnfolder]: For 30865/30865 co-relation queries the response was YES. [2023-08-30 19:38:45,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14203 conditions, 2486 events. 1469/2486 cut-off events. For 30865/30865 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13193 event pairs, 152 based on Foata normal form. 14/2500 useless extension candidates. Maximal degree in co-relation 14167. Up to 771 conditions per place. [2023-08-30 19:38:45,607 INFO L137 encePairwiseOnDemand]: 323/331 looper letters, 0 selfloop transitions, 0 changer transitions 176/176 dead transitions. [2023-08-30 19:38:45,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 176 transitions, 1841 flow [2023-08-30 19:38:45,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 19:38:45,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 19:38:45,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1783 transitions. [2023-08-30 19:38:45,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33666918429003023 [2023-08-30 19:38:45,613 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1783 transitions. [2023-08-30 19:38:45,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1783 transitions. [2023-08-30 19:38:45,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:38:45,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1783 transitions. [2023-08-30 19:38:45,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 111.4375) internal successors, (1783), 16 states have internal predecessors, (1783), 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 19:38:45,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 331.0) internal successors, (5627), 17 states have internal predecessors, (5627), 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 19:38:45,625 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 331.0) internal successors, (5627), 17 states have internal predecessors, (5627), 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 19:38:45,625 INFO L175 Difference]: Start difference. First operand has 93 places, 49 transitions, 401 flow. Second operand 16 states and 1783 transitions. [2023-08-30 19:38:45,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 176 transitions, 1841 flow [2023-08-30 19:38:45,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 176 transitions, 1508 flow, removed 134 selfloop flow, removed 16 redundant places. [2023-08-30 19:38:45,663 INFO L231 Difference]: Finished difference. Result has 76 places, 0 transitions, 0 flow [2023-08-30 19:38:45,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=0, PETRI_PLACES=76, PETRI_TRANSITIONS=0} [2023-08-30 19:38:45,664 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 45 predicate places. [2023-08-30 19:38:45,664 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 0 transitions, 0 flow [2023-08-30 19:38:45,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 106.95833333333333) internal successors, (2567), 24 states have internal predecessors, (2567), 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 19:38:45,669 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-30 19:38:45,670 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-30 19:38:45,670 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-30 19:38:45,670 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-30 19:38:45,676 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 19:38:45,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:38:45,872 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2023-08-30 19:38:45,875 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 19:38:45,875 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 19:38:45,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 07:38:45 BasicIcfg [2023-08-30 19:38:45,877 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 19:38:45,878 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 19:38:45,878 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 19:38:45,878 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 19:38:45,878 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:37:44" (3/4) ... [2023-08-30 19:38:45,880 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-30 19:38:45,885 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-08-30 19:38:45,885 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-08-30 19:38:45,885 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2023-08-30 19:38:45,890 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 25 nodes and edges [2023-08-30 19:38:45,890 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-08-30 19:38:45,891 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-08-30 19:38:45,891 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-08-30 19:38:45,937 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-30 19:38:45,938 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 19:38:45,938 INFO L158 Benchmark]: Toolchain (without parser) took 62876.38ms. Allocated memory was 71.3MB in the beginning and 213.9MB in the end (delta: 142.6MB). Free memory was 48.8MB in the beginning and 131.0MB in the end (delta: -82.2MB). Peak memory consumption was 61.7MB. Max. memory is 16.1GB. [2023-08-30 19:38:45,938 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 71.3MB. Free memory was 48.3MB in the beginning and 48.2MB in the end (delta: 56.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 19:38:45,939 INFO L158 Benchmark]: CACSL2BoogieTranslator took 324.60ms. Allocated memory is still 71.3MB. Free memory was 48.5MB in the beginning and 36.7MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 19:38:45,939 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.01ms. Allocated memory is still 71.3MB. Free memory was 36.7MB in the beginning and 34.8MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 19:38:45,939 INFO L158 Benchmark]: Boogie Preprocessor took 80.88ms. Allocated memory is still 71.3MB. Free memory was 34.8MB in the beginning and 50.9MB in the end (delta: -16.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-08-30 19:38:45,940 INFO L158 Benchmark]: RCFGBuilder took 577.51ms. Allocated memory was 71.3MB in the beginning and 90.2MB in the end (delta: 18.9MB). Free memory was 50.9MB in the beginning and 64.5MB in the end (delta: -13.6MB). Peak memory consumption was 20.9MB. Max. memory is 16.1GB. [2023-08-30 19:38:45,940 INFO L158 Benchmark]: TraceAbstraction took 61766.03ms. Allocated memory was 90.2MB in the beginning and 213.9MB in the end (delta: 123.7MB). Free memory was 63.6MB in the beginning and 134.8MB in the end (delta: -71.2MB). Peak memory consumption was 140.5MB. Max. memory is 16.1GB. [2023-08-30 19:38:45,940 INFO L158 Benchmark]: Witness Printer took 59.93ms. Allocated memory is still 213.9MB. Free memory was 134.8MB in the beginning and 131.0MB in the end (delta: 3.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-08-30 19:38:45,946 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 71.3MB. Free memory was 48.3MB in the beginning and 48.2MB in the end (delta: 56.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 324.60ms. Allocated memory is still 71.3MB. Free memory was 48.5MB in the beginning and 36.7MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.01ms. Allocated memory is still 71.3MB. Free memory was 36.7MB in the beginning and 34.8MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 80.88ms. Allocated memory is still 71.3MB. Free memory was 34.8MB in the beginning and 50.9MB in the end (delta: -16.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 577.51ms. Allocated memory was 71.3MB in the beginning and 90.2MB in the end (delta: 18.9MB). Free memory was 50.9MB in the beginning and 64.5MB in the end (delta: -13.6MB). Peak memory consumption was 20.9MB. Max. memory is 16.1GB. * TraceAbstraction took 61766.03ms. Allocated memory was 90.2MB in the beginning and 213.9MB in the end (delta: 123.7MB). Free memory was 63.6MB in the beginning and 134.8MB in the end (delta: -71.2MB). Peak memory consumption was 140.5MB. Max. memory is 16.1GB. * Witness Printer took 59.93ms. Allocated memory is still 213.9MB. Free memory was 134.8MB in the beginning and 131.0MB in the end (delta: 3.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.4s, 154 PlacesBefore, 31 PlacesAfterwards, 156 TransitionsBefore, 24 TransitionsAfterwards, 1134 CoEnabledTransitionPairs, 7 FixpointIterations, 94 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 29 TrivialYvCompositions, 4 ConcurrentYvCompositions, 9 ChoiceCompositions, 162 TotalNumberOfCompositions, 1738 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1289, independent: 1233, independent conditional: 0, independent unconditional: 1233, dependent: 56, dependent conditional: 0, dependent unconditional: 56, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 600, independent: 582, independent conditional: 0, independent unconditional: 582, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1289, independent: 651, independent conditional: 0, independent unconditional: 651, dependent: 38, dependent conditional: 0, dependent unconditional: 38, unknown: 600, unknown conditional: 0, unknown unconditional: 600] , Statistics on independence cache: Total cache size (in pairs): 58, Positive cache size: 52, Positive conditional cache size: 0, Positive unconditional cache size: 52, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 115]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 187 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 61.6s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 42.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.5s, HoareTripleCheckerStatistics: 23 mSolverCounterUnknown, 1566 SdHoareTripleChecker+Valid, 37.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1446 mSDsluCounter, 1077 SdHoareTripleChecker+Invalid, 36.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 266 IncrementalHoareTripleChecker+Unchecked, 1050 mSDsCounter, 131 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3408 IncrementalHoareTripleChecker+Invalid, 3828 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 131 mSolverCounterUnsat, 27 mSDtfsCounter, 3408 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 233 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 122 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 12.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=401occurred in iteration=6, InterpolantAutomatonStates: 82, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 12.0s InterpolantComputationTime, 234 NumberOfCodeBlocks, 234 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 293 ConstructedInterpolants, 18 QuantifiedInterpolants, 2442 SizeOfPredicates, 46 NumberOfNonLiveVariables, 684 ConjunctsInSsa, 78 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 18/33 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-30 19:38:45,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE