./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe004_tso.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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/pthread-wmm/safe004_tso.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 28abced7878c2be916ea5a54f12b603c21b6525f16f4a0aadbf776b589e0bc49 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 09:54:54,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 09:54:54,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 09:54:54,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 09:54:54,832 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 09:54:54,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 09:54:54,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 09:54:54,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 09:54:54,842 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 09:54:54,846 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 09:54:54,847 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 09:54:54,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 09:54:54,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 09:54:54,852 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 09:54:54,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 09:54:54,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 09:54:54,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 09:54:54,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 09:54:54,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 09:54:54,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 09:54:54,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 09:54:54,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 09:54:54,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 09:54:54,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 09:54:54,884 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 09:54:54,885 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 09:54:54,885 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 09:54:54,886 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 09:54:54,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 09:54:54,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 09:54:54,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 09:54:54,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 09:54:54,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 09:54:54,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 09:54:54,890 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 09:54:54,890 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 09:54:54,891 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 09:54:54,891 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 09:54:54,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 09:54:54,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 09:54:54,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 09:54:54,896 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 09:54:54,928 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 09:54:54,929 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 09:54:54,930 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 09:54:54,930 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 09:54:54,931 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 09:54:54,931 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 09:54:54,932 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 09:54:54,932 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 09:54:54,932 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 09:54:54,932 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 09:54:54,933 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 09:54:54,934 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 09:54:54,934 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 09:54:54,934 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 09:54:54,934 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 09:54:54,934 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 09:54:54,935 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 09:54:54,935 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 09:54:54,935 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 09:54:54,935 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 09:54:54,935 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 09:54:54,936 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 09:54:54,936 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 09:54:54,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 09:54:54,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:54:54,936 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 09:54:54,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 09:54:54,937 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 09:54:54,937 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 09:54:54,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 09:54:54,937 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 09:54:54,938 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 09:54:54,938 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 09:54:54,938 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 09:54:54,938 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 09:54:54,938 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 28abced7878c2be916ea5a54f12b603c21b6525f16f4a0aadbf776b589e0bc49 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 09:54:55,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 09:54:55,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 09:54:55,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 09:54:55,274 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 09:54:55,275 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 09:54:55,277 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe004_tso.i [2023-09-01 09:54:56,561 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 09:54:56,813 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 09:54:56,814 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe004_tso.i [2023-09-01 09:54:56,826 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb3d3ed73/d81cbc136a2449d7b2e462149d8941df/FLAGfbc9333a3 [2023-09-01 09:54:56,840 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb3d3ed73/d81cbc136a2449d7b2e462149d8941df [2023-09-01 09:54:56,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 09:54:56,843 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 09:54:56,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 09:54:56,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 09:54:56,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 09:54:56,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:54:56" (1/1) ... [2023-09-01 09:54:56,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27a7628e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:54:56, skipping insertion in model container [2023-09-01 09:54:56,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:54:56" (1/1) ... [2023-09-01 09:54:56,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 09:54:56,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 09:54:57,023 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe004_tso.i[945,958] [2023-09-01 09:54:57,199 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:54:57,211 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 09:54:57,224 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe004_tso.i[945,958] [2023-09-01 09:54:57,273 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:54:57,313 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 09:54:57,314 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 09:54:57,320 INFO L208 MainTranslator]: Completed translation [2023-09-01 09:54:57,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:54:57 WrapperNode [2023-09-01 09:54:57,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 09:54:57,322 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 09:54:57,322 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 09:54:57,322 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 09:54:57,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:54:57" (1/1) ... [2023-09-01 09:54:57,340 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:54:57" (1/1) ... [2023-09-01 09:54:57,356 INFO L138 Inliner]: procedures = 176, calls = 53, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2023-09-01 09:54:57,356 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 09:54:57,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 09:54:57,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 09:54:57,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 09:54:57,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:54:57" (1/1) ... [2023-09-01 09:54:57,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:54:57" (1/1) ... [2023-09-01 09:54:57,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:54:57" (1/1) ... [2023-09-01 09:54:57,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:54:57" (1/1) ... [2023-09-01 09:54:57,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:54:57" (1/1) ... [2023-09-01 09:54:57,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:54:57" (1/1) ... [2023-09-01 09:54:57,376 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:54:57" (1/1) ... [2023-09-01 09:54:57,377 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:54:57" (1/1) ... [2023-09-01 09:54:57,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 09:54:57,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 09:54:57,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 09:54:57,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 09:54:57,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:54:57" (1/1) ... [2023-09-01 09:54:57,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:54:57,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:54:57,415 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) [2023-09-01 09:54:57,444 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 [2023-09-01 09:54:57,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 09:54:57,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 09:54:57,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 09:54:57,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 09:54:57,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 09:54:57,460 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-09-01 09:54:57,460 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-09-01 09:54:57,460 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-09-01 09:54:57,460 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-09-01 09:54:57,460 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-09-01 09:54:57,461 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-09-01 09:54:57,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 09:54:57,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 09:54:57,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 09:54:57,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 09:54:57,462 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 09:54:57,644 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 09:54:57,646 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 09:54:57,816 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 09:54:57,822 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 09:54:57,823 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-09-01 09:54:57,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:54:57 BoogieIcfgContainer [2023-09-01 09:54:57,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 09:54:57,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 09:54:57,827 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 09:54:57,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 09:54:57,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 09:54:56" (1/3) ... [2023-09-01 09:54:57,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40987c34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:54:57, skipping insertion in model container [2023-09-01 09:54:57,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:54:57" (2/3) ... [2023-09-01 09:54:57,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40987c34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:54:57, skipping insertion in model container [2023-09-01 09:54:57,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:54:57" (3/3) ... [2023-09-01 09:54:57,832 INFO L112 eAbstractionObserver]: Analyzing ICFG safe004_tso.i [2023-09-01 09:54:57,840 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 09:54:57,849 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 09:54:57,849 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 09:54:57,849 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 09:54:57,938 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:54:57,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 84 transitions, 183 flow [2023-09-01 09:54:58,054 INFO L130 PetriNetUnfolder]: 2/81 cut-off events. [2023-09-01 09:54:58,054 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:54:58,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 81 events. 2/81 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 48 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2023-09-01 09:54:58,060 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 84 transitions, 183 flow [2023-09-01 09:54:58,066 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 69 transitions, 147 flow [2023-09-01 09:54:58,073 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:54:58,085 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 69 transitions, 147 flow [2023-09-01 09:54:58,092 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 78 places, 69 transitions, 147 flow [2023-09-01 09:54:58,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 69 transitions, 147 flow [2023-09-01 09:54:58,111 INFO L130 PetriNetUnfolder]: 1/69 cut-off events. [2023-09-01 09:54:58,113 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:54:58,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 69 events. 1/69 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 39 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-09-01 09:54:58,117 INFO L119 LiptonReduction]: Number of co-enabled transitions 1044 [2023-09-01 09:54:59,911 INFO L134 LiptonReduction]: Checked pairs total: 1941 [2023-09-01 09:54:59,911 INFO L136 LiptonReduction]: Total number of compositions: 55 [2023-09-01 09:54:59,923 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 09:54:59,928 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;@410d9b6d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:54:59,929 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-09-01 09:54:59,933 INFO L130 PetriNetUnfolder]: 0/15 cut-off events. [2023-09-01 09:54:59,933 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:54:59,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:54:59,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:54:59,934 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)] === [2023-09-01 09:54:59,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:54:59,939 INFO L85 PathProgramCache]: Analyzing trace with hash -856354579, now seen corresponding path program 1 times [2023-09-01 09:54:59,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:54:59,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816508552] [2023-09-01 09:54:59,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:54:59,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:55:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:55:00,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:55:00,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:55:00,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816508552] [2023-09-01 09:55:00,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816508552] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:55:00,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:55:00,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 09:55:00,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613113749] [2023-09-01 09:55:00,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:55:00,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 09:55:00,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:55:00,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 09:55:00,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 09:55:00,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 139 [2023-09-01 09:55:00,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 17 transitions, 43 flow. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 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) [2023-09-01 09:55:00,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:55:00,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 139 [2023-09-01 09:55:00,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:55:00,785 INFO L130 PetriNetUnfolder]: 522/834 cut-off events. [2023-09-01 09:55:00,786 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-09-01 09:55:00,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1723 conditions, 834 events. 522/834 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3544 event pairs, 281 based on Foata normal form. 61/895 useless extension candidates. Maximal degree in co-relation 1712. Up to 589 conditions per place. [2023-09-01 09:55:00,797 INFO L137 encePairwiseOnDemand]: 131/139 looper letters, 24 selfloop transitions, 7 changer transitions 0/31 dead transitions. [2023-09-01 09:55:00,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 31 transitions, 139 flow [2023-09-01 09:55:00,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 09:55:00,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 09:55:00,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 236 transitions. [2023-09-01 09:55:00,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565947242206235 [2023-09-01 09:55:00,815 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 236 transitions. [2023-09-01 09:55:00,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 236 transitions. [2023-09-01 09:55:00,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:55:00,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 236 transitions. [2023-09-01 09:55:00,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 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) [2023-09-01 09:55:00,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 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) [2023-09-01 09:55:00,826 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 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) [2023-09-01 09:55:00,828 INFO L175 Difference]: Start difference. First operand has 27 places, 17 transitions, 43 flow. Second operand 3 states and 236 transitions. [2023-09-01 09:55:00,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 31 transitions, 139 flow [2023-09-01 09:55:00,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 31 transitions, 134 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 09:55:00,832 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 94 flow [2023-09-01 09:55:00,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=28, PETRI_TRANSITIONS=23} [2023-09-01 09:55:00,838 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 1 predicate places. [2023-09-01 09:55:00,838 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 94 flow [2023-09-01 09:55:00,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 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) [2023-09-01 09:55:00,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:55:00,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:55:00,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 09:55:00,841 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)] === [2023-09-01 09:55:00,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:55:00,841 INFO L85 PathProgramCache]: Analyzing trace with hash -777188759, now seen corresponding path program 1 times [2023-09-01 09:55:00,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:55:00,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826154041] [2023-09-01 09:55:00,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:55:00,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:55:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:55:01,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:55:01,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:55:01,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826154041] [2023-09-01 09:55:01,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826154041] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:55:01,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:55:01,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 09:55:01,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933328980] [2023-09-01 09:55:01,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:55:01,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 09:55:01,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:55:01,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 09:55:01,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 09:55:01,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 139 [2023-09-01 09:55:01,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 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) [2023-09-01 09:55:01,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:55:01,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 139 [2023-09-01 09:55:01,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:55:01,219 INFO L130 PetriNetUnfolder]: 437/702 cut-off events. [2023-09-01 09:55:01,220 INFO L131 PetriNetUnfolder]: For 336/336 co-relation queries the response was YES. [2023-09-01 09:55:01,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2044 conditions, 702 events. 437/702 cut-off events. For 336/336 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2718 event pairs, 160 based on Foata normal form. 14/716 useless extension candidates. Maximal degree in co-relation 2032. Up to 331 conditions per place. [2023-09-01 09:55:01,223 INFO L137 encePairwiseOnDemand]: 132/139 looper letters, 29 selfloop transitions, 7 changer transitions 2/38 dead transitions. [2023-09-01 09:55:01,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 38 transitions, 224 flow [2023-09-01 09:55:01,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 09:55:01,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 09:55:01,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 305 transitions. [2023-09-01 09:55:01,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5485611510791367 [2023-09-01 09:55:01,226 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 305 transitions. [2023-09-01 09:55:01,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 305 transitions. [2023-09-01 09:55:01,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:55:01,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 305 transitions. [2023-09-01 09:55:01,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 76.25) internal successors, (305), 4 states have internal predecessors, (305), 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) [2023-09-01 09:55:01,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 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) [2023-09-01 09:55:01,230 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 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) [2023-09-01 09:55:01,231 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 94 flow. Second operand 4 states and 305 transitions. [2023-09-01 09:55:01,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 38 transitions, 224 flow [2023-09-01 09:55:01,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 38 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 09:55:01,234 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 134 flow [2023-09-01 09:55:01,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-09-01 09:55:01,235 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2023-09-01 09:55:01,235 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 134 flow [2023-09-01 09:55:01,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 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) [2023-09-01 09:55:01,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:55:01,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:55:01,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 09:55:01,236 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)] === [2023-09-01 09:55:01,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:55:01,237 INFO L85 PathProgramCache]: Analyzing trace with hash 445173533, now seen corresponding path program 1 times [2023-09-01 09:55:01,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:55:01,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686111756] [2023-09-01 09:55:01,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:55:01,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:55:01,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:55:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:55:01,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:55:01,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686111756] [2023-09-01 09:55:01,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686111756] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:55:01,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:55:01,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 09:55:01,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315789136] [2023-09-01 09:55:01,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:55:01,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 09:55:01,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:55:01,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 09:55:01,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 09:55:01,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 139 [2023-09-01 09:55:01,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 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) [2023-09-01 09:55:01,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:55:01,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 139 [2023-09-01 09:55:01,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:55:01,514 INFO L130 PetriNetUnfolder]: 428/687 cut-off events. [2023-09-01 09:55:01,515 INFO L131 PetriNetUnfolder]: For 456/456 co-relation queries the response was YES. [2023-09-01 09:55:01,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2159 conditions, 687 events. 428/687 cut-off events. For 456/456 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2682 event pairs, 78 based on Foata normal form. 2/689 useless extension candidates. Maximal degree in co-relation 2144. Up to 460 conditions per place. [2023-09-01 09:55:01,521 INFO L137 encePairwiseOnDemand]: 131/139 looper letters, 35 selfloop transitions, 14 changer transitions 3/52 dead transitions. [2023-09-01 09:55:01,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 52 transitions, 344 flow [2023-09-01 09:55:01,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 09:55:01,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 09:55:01,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 314 transitions. [2023-09-01 09:55:01,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564748201438849 [2023-09-01 09:55:01,523 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 314 transitions. [2023-09-01 09:55:01,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 314 transitions. [2023-09-01 09:55:01,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:55:01,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 314 transitions. [2023-09-01 09:55:01,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 78.5) internal successors, (314), 4 states have internal predecessors, (314), 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) [2023-09-01 09:55:01,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 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) [2023-09-01 09:55:01,528 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 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) [2023-09-01 09:55:01,528 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 134 flow. Second operand 4 states and 314 transitions. [2023-09-01 09:55:01,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 52 transitions, 344 flow [2023-09-01 09:55:01,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 52 transitions, 339 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 09:55:01,534 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 238 flow [2023-09-01 09:55:01,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2023-09-01 09:55:01,535 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 10 predicate places. [2023-09-01 09:55:01,538 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 238 flow [2023-09-01 09:55:01,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 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) [2023-09-01 09:55:01,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:55:01,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:55:01,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 09:55:01,540 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)] === [2023-09-01 09:55:01,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:55:01,540 INFO L85 PathProgramCache]: Analyzing trace with hash 445173564, now seen corresponding path program 1 times [2023-09-01 09:55:01,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:55:01,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674553534] [2023-09-01 09:55:01,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:55:01,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:55:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:55:01,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:55:01,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:55:01,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674553534] [2023-09-01 09:55:01,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674553534] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:55:01,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:55:01,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 09:55:01,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574137561] [2023-09-01 09:55:01,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:55:01,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 09:55:01,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:55:01,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 09:55:01,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 09:55:01,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 139 [2023-09-01 09:55:01,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 238 flow. Second operand has 4 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 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) [2023-09-01 09:55:01,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:55:01,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 139 [2023-09-01 09:55:01,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:55:01,840 INFO L130 PetriNetUnfolder]: 329/550 cut-off events. [2023-09-01 09:55:01,840 INFO L131 PetriNetUnfolder]: For 901/901 co-relation queries the response was YES. [2023-09-01 09:55:01,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2003 conditions, 550 events. 329/550 cut-off events. For 901/901 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2139 event pairs, 68 based on Foata normal form. 2/552 useless extension candidates. Maximal degree in co-relation 1984. Up to 386 conditions per place. [2023-09-01 09:55:01,844 INFO L137 encePairwiseOnDemand]: 131/139 looper letters, 34 selfloop transitions, 17 changer transitions 4/55 dead transitions. [2023-09-01 09:55:01,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 468 flow [2023-09-01 09:55:01,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 09:55:01,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 09:55:01,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 312 transitions. [2023-09-01 09:55:01,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5611510791366906 [2023-09-01 09:55:01,850 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 312 transitions. [2023-09-01 09:55:01,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 312 transitions. [2023-09-01 09:55:01,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:55:01,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 312 transitions. [2023-09-01 09:55:01,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 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) [2023-09-01 09:55:01,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 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) [2023-09-01 09:55:01,854 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 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) [2023-09-01 09:55:01,854 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 238 flow. Second operand 4 states and 312 transitions. [2023-09-01 09:55:01,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 468 flow [2023-09-01 09:55:01,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 55 transitions, 468 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 09:55:01,860 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 358 flow [2023-09-01 09:55:01,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=358, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2023-09-01 09:55:01,862 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 16 predicate places. [2023-09-01 09:55:01,862 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 358 flow [2023-09-01 09:55:01,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 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) [2023-09-01 09:55:01,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:55:01,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:55:01,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 09:55:01,863 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)] === [2023-09-01 09:55:01,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:55:01,864 INFO L85 PathProgramCache]: Analyzing trace with hash 916515859, now seen corresponding path program 1 times [2023-09-01 09:55:01,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:55:01,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93447341] [2023-09-01 09:55:01,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:55:01,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:55:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:55:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:55:02,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:55:02,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93447341] [2023-09-01 09:55:02,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93447341] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:55:02,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:55:02,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 09:55:02,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602633411] [2023-09-01 09:55:02,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:55:02,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 09:55:02,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:55:02,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 09:55:02,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 09:55:02,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 139 [2023-09-01 09:55:02,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 358 flow. Second operand has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 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) [2023-09-01 09:55:02,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:55:02,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 139 [2023-09-01 09:55:02,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:55:02,183 INFO L130 PetriNetUnfolder]: 334/585 cut-off events. [2023-09-01 09:55:02,184 INFO L131 PetriNetUnfolder]: For 1631/1631 co-relation queries the response was YES. [2023-09-01 09:55:02,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2368 conditions, 585 events. 334/585 cut-off events. For 1631/1631 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2457 event pairs, 66 based on Foata normal form. 6/591 useless extension candidates. Maximal degree in co-relation 2344. Up to 179 conditions per place. [2023-09-01 09:55:02,188 INFO L137 encePairwiseOnDemand]: 131/139 looper letters, 27 selfloop transitions, 16 changer transitions 29/72 dead transitions. [2023-09-01 09:55:02,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 72 transitions, 645 flow [2023-09-01 09:55:02,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 09:55:02,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 09:55:02,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 539 transitions. [2023-09-01 09:55:02,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5539568345323741 [2023-09-01 09:55:02,191 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 539 transitions. [2023-09-01 09:55:02,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 539 transitions. [2023-09-01 09:55:02,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:55:02,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 539 transitions. [2023-09-01 09:55:02,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 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) [2023-09-01 09:55:02,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 139.0) internal successors, (1112), 8 states have internal predecessors, (1112), 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) [2023-09-01 09:55:02,195 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 139.0) internal successors, (1112), 8 states have internal predecessors, (1112), 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) [2023-09-01 09:55:02,195 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 358 flow. Second operand 7 states and 539 transitions. [2023-09-01 09:55:02,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 72 transitions, 645 flow [2023-09-01 09:55:02,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 72 transitions, 645 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 09:55:02,203 INFO L231 Difference]: Finished difference. Result has 51 places, 31 transitions, 325 flow [2023-09-01 09:55:02,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=325, PETRI_PLACES=51, PETRI_TRANSITIONS=31} [2023-09-01 09:55:02,204 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 24 predicate places. [2023-09-01 09:55:02,204 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 31 transitions, 325 flow [2023-09-01 09:55:02,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 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) [2023-09-01 09:55:02,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:55:02,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:55:02,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 09:55:02,205 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)] === [2023-09-01 09:55:02,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:55:02,206 INFO L85 PathProgramCache]: Analyzing trace with hash 916486099, now seen corresponding path program 2 times [2023-09-01 09:55:02,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:55:02,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849211282] [2023-09-01 09:55:02,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:55:02,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:55:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:55:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:55:02,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:55:02,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849211282] [2023-09-01 09:55:02,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849211282] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:55:02,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:55:02,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 09:55:02,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089439199] [2023-09-01 09:55:02,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:55:02,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 09:55:02,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:55:02,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 09:55:02,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 09:55:02,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 139 [2023-09-01 09:55:02,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 31 transitions, 325 flow. Second operand has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 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) [2023-09-01 09:55:02,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:55:02,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 139 [2023-09-01 09:55:02,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:55:02,428 INFO L130 PetriNetUnfolder]: 230/409 cut-off events. [2023-09-01 09:55:02,428 INFO L131 PetriNetUnfolder]: For 1696/1696 co-relation queries the response was YES. [2023-09-01 09:55:02,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1772 conditions, 409 events. 230/409 cut-off events. For 1696/1696 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1579 event pairs, 50 based on Foata normal form. 10/419 useless extension candidates. Maximal degree in co-relation 1744. Up to 264 conditions per place. [2023-09-01 09:55:02,431 INFO L137 encePairwiseOnDemand]: 133/139 looper letters, 22 selfloop transitions, 6 changer transitions 18/46 dead transitions. [2023-09-01 09:55:02,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 46 transitions, 491 flow [2023-09-01 09:55:02,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 09:55:02,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 09:55:02,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 376 transitions. [2023-09-01 09:55:02,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5410071942446043 [2023-09-01 09:55:02,433 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 376 transitions. [2023-09-01 09:55:02,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 376 transitions. [2023-09-01 09:55:02,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:55:02,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 376 transitions. [2023-09-01 09:55:02,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 75.2) internal successors, (376), 5 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:55:02,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 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) [2023-09-01 09:55:02,436 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 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) [2023-09-01 09:55:02,436 INFO L175 Difference]: Start difference. First operand has 51 places, 31 transitions, 325 flow. Second operand 5 states and 376 transitions. [2023-09-01 09:55:02,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 46 transitions, 491 flow [2023-09-01 09:55:02,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 46 transitions, 444 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-09-01 09:55:02,443 INFO L231 Difference]: Finished difference. Result has 50 places, 19 transitions, 154 flow [2023-09-01 09:55:02,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=50, PETRI_TRANSITIONS=19} [2023-09-01 09:55:02,444 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 23 predicate places. [2023-09-01 09:55:02,444 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 19 transitions, 154 flow [2023-09-01 09:55:02,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 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) [2023-09-01 09:55:02,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:55:02,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:55:02,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 09:55:02,445 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)] === [2023-09-01 09:55:02,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:55:02,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1653915931, now seen corresponding path program 1 times [2023-09-01 09:55:02,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:55:02,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419052073] [2023-09-01 09:55:02,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:55:02,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:55:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:55:02,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:55:02,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:55:02,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419052073] [2023-09-01 09:55:02,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419052073] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:55:02,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:55:02,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 09:55:02,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270050875] [2023-09-01 09:55:02,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:55:02,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 09:55:02,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:55:02,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 09:55:02,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 09:55:02,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 139 [2023-09-01 09:55:02,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 19 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 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) [2023-09-01 09:55:02,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:55:02,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 139 [2023-09-01 09:55:02,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:55:02,664 INFO L130 PetriNetUnfolder]: 120/229 cut-off events. [2023-09-01 09:55:02,665 INFO L131 PetriNetUnfolder]: For 894/894 co-relation queries the response was YES. [2023-09-01 09:55:02,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 933 conditions, 229 events. 120/229 cut-off events. For 894/894 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 743 event pairs, 46 based on Foata normal form. 4/233 useless extension candidates. Maximal degree in co-relation 906. Up to 98 conditions per place. [2023-09-01 09:55:02,667 INFO L137 encePairwiseOnDemand]: 133/139 looper letters, 20 selfloop transitions, 5 changer transitions 8/33 dead transitions. [2023-09-01 09:55:02,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 33 transitions, 292 flow [2023-09-01 09:55:02,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 09:55:02,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 09:55:02,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 372 transitions. [2023-09-01 09:55:02,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5352517985611511 [2023-09-01 09:55:02,669 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 372 transitions. [2023-09-01 09:55:02,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 372 transitions. [2023-09-01 09:55:02,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:55:02,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 372 transitions. [2023-09-01 09:55:02,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 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) [2023-09-01 09:55:02,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 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) [2023-09-01 09:55:02,672 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 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) [2023-09-01 09:55:02,672 INFO L175 Difference]: Start difference. First operand has 50 places, 19 transitions, 154 flow. Second operand 5 states and 372 transitions. [2023-09-01 09:55:02,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 33 transitions, 292 flow [2023-09-01 09:55:02,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 33 transitions, 195 flow, removed 6 selfloop flow, removed 18 redundant places. [2023-09-01 09:55:02,675 INFO L231 Difference]: Finished difference. Result has 37 places, 17 transitions, 87 flow [2023-09-01 09:55:02,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=87, PETRI_PLACES=37, PETRI_TRANSITIONS=17} [2023-09-01 09:55:02,676 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 10 predicate places. [2023-09-01 09:55:02,676 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 17 transitions, 87 flow [2023-09-01 09:55:02,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 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) [2023-09-01 09:55:02,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:55:02,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:55:02,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 09:55:02,677 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 09:55:02,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:55:02,677 INFO L85 PathProgramCache]: Analyzing trace with hash -259012253, now seen corresponding path program 2 times [2023-09-01 09:55:02,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:55:02,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763663062] [2023-09-01 09:55:02,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:55:02,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:55:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:55:02,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:55:02,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:55:02,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763663062] [2023-09-01 09:55:02,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763663062] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:55:02,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:55:02,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 09:55:02,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896485769] [2023-09-01 09:55:02,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:55:02,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 09:55:02,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:55:02,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 09:55:02,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 09:55:02,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 139 [2023-09-01 09:55:02,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 17 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 75.75) internal successors, (303), 4 states have internal predecessors, (303), 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) [2023-09-01 09:55:02,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:55:02,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 139 [2023-09-01 09:55:02,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:55:02,914 INFO L130 PetriNetUnfolder]: 46/116 cut-off events. [2023-09-01 09:55:02,914 INFO L131 PetriNetUnfolder]: For 162/165 co-relation queries the response was YES. [2023-09-01 09:55:02,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 116 events. 46/116 cut-off events. For 162/165 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 371 event pairs, 16 based on Foata normal form. 4/118 useless extension candidates. Maximal degree in co-relation 331. Up to 62 conditions per place. [2023-09-01 09:55:02,915 INFO L137 encePairwiseOnDemand]: 133/139 looper letters, 17 selfloop transitions, 3 changer transitions 13/36 dead transitions. [2023-09-01 09:55:02,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 36 transitions, 230 flow [2023-09-01 09:55:02,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 09:55:02,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 09:55:02,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 400 transitions. [2023-09-01 09:55:02,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755395683453237 [2023-09-01 09:55:02,918 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 400 transitions. [2023-09-01 09:55:02,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 400 transitions. [2023-09-01 09:55:02,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:55:02,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 400 transitions. [2023-09-01 09:55:02,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:55:02,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 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) [2023-09-01 09:55:02,921 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 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) [2023-09-01 09:55:02,921 INFO L175 Difference]: Start difference. First operand has 37 places, 17 transitions, 87 flow. Second operand 5 states and 400 transitions. [2023-09-01 09:55:02,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 36 transitions, 230 flow [2023-09-01 09:55:02,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 181 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-09-01 09:55:02,923 INFO L231 Difference]: Finished difference. Result has 37 places, 19 transitions, 92 flow [2023-09-01 09:55:02,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=92, PETRI_PLACES=37, PETRI_TRANSITIONS=19} [2023-09-01 09:55:02,924 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 10 predicate places. [2023-09-01 09:55:02,924 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 19 transitions, 92 flow [2023-09-01 09:55:02,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.75) internal successors, (303), 4 states have internal predecessors, (303), 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) [2023-09-01 09:55:02,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:55:02,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:55:02,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 09:55:02,925 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 09:55:02,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:55:02,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1256682117, now seen corresponding path program 1 times [2023-09-01 09:55:02,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:55:02,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841944406] [2023-09-01 09:55:02,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:55:02,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:55:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:55:03,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:55:03,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:55:03,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841944406] [2023-09-01 09:55:03,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841944406] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:55:03,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:55:03,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 09:55:03,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625880360] [2023-09-01 09:55:03,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:55:03,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 09:55:03,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:55:03,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 09:55:03,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 09:55:03,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 139 [2023-09-01 09:55:03,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 19 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 75.4) internal successors, (377), 5 states have internal predecessors, (377), 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) [2023-09-01 09:55:03,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:55:03,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 139 [2023-09-01 09:55:03,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:55:03,153 INFO L130 PetriNetUnfolder]: 24/70 cut-off events. [2023-09-01 09:55:03,153 INFO L131 PetriNetUnfolder]: For 96/109 co-relation queries the response was YES. [2023-09-01 09:55:03,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 70 events. 24/70 cut-off events. For 96/109 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 174 event pairs, 3 based on Foata normal form. 5/74 useless extension candidates. Maximal degree in co-relation 233. Up to 40 conditions per place. [2023-09-01 09:55:03,154 INFO L137 encePairwiseOnDemand]: 133/139 looper letters, 16 selfloop transitions, 5 changer transitions 13/37 dead transitions. [2023-09-01 09:55:03,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 37 transitions, 250 flow [2023-09-01 09:55:03,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 09:55:03,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 09:55:03,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 474 transitions. [2023-09-01 09:55:03,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5683453237410072 [2023-09-01 09:55:03,156 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 474 transitions. [2023-09-01 09:55:03,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 474 transitions. [2023-09-01 09:55:03,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:55:03,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 474 transitions. [2023-09-01 09:55:03,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 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) [2023-09-01 09:55:03,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 139.0) internal successors, (973), 7 states have internal predecessors, (973), 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) [2023-09-01 09:55:03,160 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 139.0) internal successors, (973), 7 states have internal predecessors, (973), 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) [2023-09-01 09:55:03,160 INFO L175 Difference]: Start difference. First operand has 37 places, 19 transitions, 92 flow. Second operand 6 states and 474 transitions. [2023-09-01 09:55:03,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 37 transitions, 250 flow [2023-09-01 09:55:03,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 245 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 09:55:03,162 INFO L231 Difference]: Finished difference. Result has 41 places, 19 transitions, 111 flow [2023-09-01 09:55:03,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=111, PETRI_PLACES=41, PETRI_TRANSITIONS=19} [2023-09-01 09:55:03,163 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 14 predicate places. [2023-09-01 09:55:03,163 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 19 transitions, 111 flow [2023-09-01 09:55:03,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.4) internal successors, (377), 5 states have internal predecessors, (377), 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) [2023-09-01 09:55:03,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:55:03,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:55:03,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 09:55:03,164 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 09:55:03,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:55:03,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1940925946, now seen corresponding path program 1 times [2023-09-01 09:55:03,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:55:03,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470345418] [2023-09-01 09:55:03,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:55:03,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:55:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:55:03,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:55:03,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:55:03,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470345418] [2023-09-01 09:55:03,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470345418] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:55:03,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:55:03,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 09:55:03,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752270785] [2023-09-01 09:55:03,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:55:03,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 09:55:03,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:55:03,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 09:55:03,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 09:55:03,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 139 [2023-09-01 09:55:03,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 19 transitions, 111 flow. Second operand has 6 states, 6 states have (on average 75.16666666666667) internal successors, (451), 6 states have internal predecessors, (451), 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) [2023-09-01 09:55:03,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:55:03,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 139 [2023-09-01 09:55:03,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:55:03,406 INFO L130 PetriNetUnfolder]: 11/41 cut-off events. [2023-09-01 09:55:03,406 INFO L131 PetriNetUnfolder]: For 108/115 co-relation queries the response was YES. [2023-09-01 09:55:03,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 41 events. 11/41 cut-off events. For 108/115 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs, 2 based on Foata normal form. 4/44 useless extension candidates. Maximal degree in co-relation 152. Up to 17 conditions per place. [2023-09-01 09:55:03,407 INFO L137 encePairwiseOnDemand]: 133/139 looper letters, 0 selfloop transitions, 0 changer transitions 26/26 dead transitions. [2023-09-01 09:55:03,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 26 transitions, 185 flow [2023-09-01 09:55:03,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 09:55:03,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 09:55:03,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 535 transitions. [2023-09-01 09:55:03,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5498458376156218 [2023-09-01 09:55:03,409 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 535 transitions. [2023-09-01 09:55:03,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 535 transitions. [2023-09-01 09:55:03,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:55:03,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 535 transitions. [2023-09-01 09:55:03,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 76.42857142857143) internal successors, (535), 7 states have internal predecessors, (535), 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) [2023-09-01 09:55:03,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 139.0) internal successors, (1112), 8 states have internal predecessors, (1112), 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) [2023-09-01 09:55:03,413 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 139.0) internal successors, (1112), 8 states have internal predecessors, (1112), 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) [2023-09-01 09:55:03,413 INFO L175 Difference]: Start difference. First operand has 41 places, 19 transitions, 111 flow. Second operand 7 states and 535 transitions. [2023-09-01 09:55:03,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 26 transitions, 185 flow [2023-09-01 09:55:03,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 26 transitions, 153 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-09-01 09:55:03,414 INFO L231 Difference]: Finished difference. Result has 38 places, 0 transitions, 0 flow [2023-09-01 09:55:03,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=38, PETRI_TRANSITIONS=0} [2023-09-01 09:55:03,415 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 11 predicate places. [2023-09-01 09:55:03,415 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 0 transitions, 0 flow [2023-09-01 09:55:03,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 75.16666666666667) internal successors, (451), 6 states have internal predecessors, (451), 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) [2023-09-01 09:55:03,418 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-09-01 09:55:03,418 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-09-01 09:55:03,418 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-09-01 09:55:03,418 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-09-01 09:55:03,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 09:55:03,419 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 09:55:03,421 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-09-01 09:55:03,421 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-09-01 09:55:03,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.09 09:55:03 BasicIcfg [2023-09-01 09:55:03,424 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-09-01 09:55:03,425 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-09-01 09:55:03,425 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-09-01 09:55:03,425 INFO L275 PluginConnector]: Witness Printer initialized [2023-09-01 09:55:03,425 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:54:57" (3/4) ... [2023-09-01 09:55:03,428 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-09-01 09:55:03,433 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2023-09-01 09:55:03,433 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2023-09-01 09:55:03,433 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2023-09-01 09:55:03,437 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2023-09-01 09:55:03,437 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-09-01 09:55:03,437 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-09-01 09:55:03,437 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-09-01 09:55:03,469 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-09-01 09:55:03,469 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-09-01 09:55:03,470 INFO L158 Benchmark]: Toolchain (without parser) took 6626.53ms. Allocated memory was 86.0MB in the beginning and 125.8MB in the end (delta: 39.8MB). Free memory was 59.8MB in the beginning and 64.0MB in the end (delta: -4.2MB). Peak memory consumption was 35.1MB. Max. memory is 16.1GB. [2023-09-01 09:55:03,470 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 60.8MB. Free memory was 38.5MB in the beginning and 38.5MB in the end (delta: 46.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 09:55:03,470 INFO L158 Benchmark]: CACSL2BoogieTranslator took 476.66ms. Allocated memory is still 86.0MB. Free memory was 59.6MB in the beginning and 59.9MB in the end (delta: -216.0kB). Peak memory consumption was 19.5MB. Max. memory is 16.1GB. [2023-09-01 09:55:03,470 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.81ms. Allocated memory is still 86.0MB. Free memory was 59.9MB in the beginning and 57.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 09:55:03,471 INFO L158 Benchmark]: Boogie Preprocessor took 22.14ms. Allocated memory is still 86.0MB. Free memory was 57.9MB in the beginning and 56.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 09:55:03,471 INFO L158 Benchmark]: RCFGBuilder took 445.44ms. Allocated memory is still 86.0MB. Free memory was 56.2MB in the beginning and 42.8MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-09-01 09:55:03,471 INFO L158 Benchmark]: TraceAbstraction took 5597.31ms. Allocated memory was 86.0MB in the beginning and 125.8MB in the end (delta: 39.8MB). Free memory was 42.0MB in the beginning and 67.2MB in the end (delta: -25.1MB). Peak memory consumption was 15.6MB. Max. memory is 16.1GB. [2023-09-01 09:55:03,472 INFO L158 Benchmark]: Witness Printer took 44.53ms. Allocated memory is still 125.8MB. Free memory was 66.1MB in the beginning and 64.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 09:55:03,473 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 60.8MB. Free memory was 38.5MB in the beginning and 38.5MB in the end (delta: 46.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 476.66ms. Allocated memory is still 86.0MB. Free memory was 59.6MB in the beginning and 59.9MB in the end (delta: -216.0kB). Peak memory consumption was 19.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.81ms. Allocated memory is still 86.0MB. Free memory was 59.9MB in the beginning and 57.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.14ms. Allocated memory is still 86.0MB. Free memory was 57.9MB in the beginning and 56.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 445.44ms. Allocated memory is still 86.0MB. Free memory was 56.2MB in the beginning and 42.8MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 5597.31ms. Allocated memory was 86.0MB in the beginning and 125.8MB in the end (delta: 39.8MB). Free memory was 42.0MB in the beginning and 67.2MB in the end (delta: -25.1MB). Peak memory consumption was 15.6MB. Max. memory is 16.1GB. * Witness Printer took 44.53ms. Allocated memory is still 125.8MB. Free memory was 66.1MB in the beginning and 64.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.8s, 78 PlacesBefore, 27 PlacesAfterwards, 69 TransitionsBefore, 17 TransitionsAfterwards, 1044 CoEnabledTransitionPairs, 5 FixpointIterations, 19 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 3 ConcurrentYvCompositions, 1 ChoiceCompositions, 55 TotalNumberOfCompositions, 1941 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1163, independent: 1085, independent conditional: 0, independent unconditional: 1085, dependent: 78, dependent conditional: 0, dependent unconditional: 78, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 569, independent: 552, independent conditional: 0, independent unconditional: 552, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1163, independent: 533, independent conditional: 0, independent unconditional: 533, dependent: 61, dependent conditional: 0, dependent unconditional: 61, unknown: 569, unknown conditional: 0, unknown unconditional: 569] , Statistics on independence cache: Total cache size (in pairs): 47, Positive cache size: 38, Positive conditional cache size: 0, Positive unconditional cache size: 38, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 18]: 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, 107 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: 5.4s, OverallIterations: 10, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 327 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 225 mSDsluCounter, 100 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 55 mSDsCounter, 105 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 572 IncrementalHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 105 mSolverCounterUnsat, 45 mSDtfsCounter, 572 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=358occurred in iteration=4, InterpolantAutomatonStates: 50, 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: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 118 NumberOfCodeBlocks, 118 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 490 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 0/0 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! [2023-09-01 09:55:03,492 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