./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:07:27,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:07:27,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:07:27,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:07:27,186 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:07:27,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:07:27,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:07:27,193 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:07:27,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:07:27,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:07:27,200 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:07:27,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:07:27,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:07:27,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:07:27,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:07:27,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:07:27,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:07:27,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:07:27,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:07:27,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:07:27,219 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:07:27,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:07:27,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:07:27,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:07:27,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:07:27,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:07:27,231 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:07:27,231 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:07:27,232 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:07:27,232 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:07:27,233 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:07:27,233 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:07:27,235 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:07:27,235 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:07:27,237 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:07:27,237 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:07:27,238 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:07:27,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:07:27,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:07:27,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:07:27,239 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:07:27,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:07:27,248 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:07:27,278 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:07:27,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:07:27,279 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:07:27,279 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:07:27,280 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:07:27,280 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:07:27,281 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:07:27,281 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:07:27,281 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:07:27,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:07:27,282 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:07:27,282 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:07:27,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:07:27,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:07:27,283 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:07:27,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:07:27,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:07:27,284 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:07:27,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:07:27,284 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:07:27,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:07:27,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:07:27,285 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:07:27,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:07:27,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:07:27,286 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:07:27,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:07:27,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:07:27,286 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:07:27,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:07:27,287 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:07:27,287 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:07:27,287 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:07:27,287 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 [2022-07-21 09:07:27,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:07:27,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:07:27,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:07:27,646 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:07:27,647 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:07:27,649 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2022-07-21 09:07:27,699 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4a54fc20/618794759ac8432f8323e2d1f09fa8f4/FLAG20d607da4 [2022-07-21 09:07:28,102 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:07:28,103 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2022-07-21 09:07:28,109 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4a54fc20/618794759ac8432f8323e2d1f09fa8f4/FLAG20d607da4 [2022-07-21 09:07:28,119 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4a54fc20/618794759ac8432f8323e2d1f09fa8f4 [2022-07-21 09:07:28,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:07:28,121 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:07:28,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:07:28,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:07:28,125 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:07:28,126 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:07:28" (1/1) ... [2022-07-21 09:07:28,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7862a9c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:07:28, skipping insertion in model container [2022-07-21 09:07:28,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:07:28" (1/1) ... [2022-07-21 09:07:28,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:07:28,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:07:28,293 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2022-07-21 09:07:28,336 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:07:28,347 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:07:28,380 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2022-07-21 09:07:28,389 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:07:28,405 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:07:28,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:07:28 WrapperNode [2022-07-21 09:07:28,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:07:28,407 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:07:28,407 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:07:28,408 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:07:28,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:07:28" (1/1) ... [2022-07-21 09:07:28,432 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:07:28" (1/1) ... [2022-07-21 09:07:28,467 INFO L137 Inliner]: procedures = 25, calls = 51, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 200 [2022-07-21 09:07:28,468 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:07:28,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:07:28,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:07:28,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:07:28,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:07:28" (1/1) ... [2022-07-21 09:07:28,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:07:28" (1/1) ... [2022-07-21 09:07:28,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:07:28" (1/1) ... [2022-07-21 09:07:28,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:07:28" (1/1) ... [2022-07-21 09:07:28,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:07:28" (1/1) ... [2022-07-21 09:07:28,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:07:28" (1/1) ... [2022-07-21 09:07:28,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:07:28" (1/1) ... [2022-07-21 09:07:28,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:07:28,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:07:28,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:07:28,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:07:28,498 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:07:28" (1/1) ... [2022-07-21 09:07:28,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:07:28,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:07:28,541 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 09:07:28,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 09:07:28,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:07:28,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:07:28,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:07:28,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:07:28,583 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:07:28,583 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:07:28,583 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:07:28,583 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:07:28,583 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-21 09:07:28,583 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-21 09:07:28,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:07:28,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 09:07:28,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 09:07:28,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 09:07:28,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:07:28,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:07:28,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:07:28,586 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:07:28,716 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:07:28,717 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:07:29,015 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:07:29,192 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:07:29,193 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-21 09:07:29,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:07:29 BoogieIcfgContainer [2022-07-21 09:07:29,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:07:29,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:07:29,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:07:29,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:07:29,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:07:28" (1/3) ... [2022-07-21 09:07:29,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1baf35ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:07:29, skipping insertion in model container [2022-07-21 09:07:29,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:07:28" (2/3) ... [2022-07-21 09:07:29,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1baf35ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:07:29, skipping insertion in model container [2022-07-21 09:07:29,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:07:29" (3/3) ... [2022-07-21 09:07:29,202 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2022-07-21 09:07:29,207 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:07:29,214 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:07:29,215 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:07:29,215 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:07:29,284 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-21 09:07:29,316 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 154 places, 156 transitions, 336 flow [2022-07-21 09:07:29,375 INFO L129 PetriNetUnfolder]: 12/153 cut-off events. [2022-07-21 09:07:29,382 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 09:07:29,386 INFO L84 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 153 events. 12/153 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 97 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 114. Up to 2 conditions per place. [2022-07-21 09:07:29,386 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 156 transitions, 336 flow [2022-07-21 09:07:29,390 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 142 transitions, 302 flow [2022-07-21 09:07:29,410 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:07:29,417 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@18520bc4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@744b771e [2022-07-21 09:07:29,418 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-21 09:07:29,455 INFO L129 PetriNetUnfolder]: 12/141 cut-off events. [2022-07-21 09:07:29,455 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 09:07:29,455 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:29,456 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:29,456 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:07:29,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:29,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1676153540, now seen corresponding path program 1 times [2022-07-21 09:07:29,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:29,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54330065] [2022-07-21 09:07:29,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:29,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:29,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:29,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:29,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54330065] [2022-07-21 09:07:29,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54330065] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:07:29,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:07:29,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:07:29,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602420205] [2022-07-21 09:07:29,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:07:29,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:07:29,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:29,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:07:29,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:07:29,697 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 156 [2022-07-21 09:07:29,700 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 142 transitions, 302 flow. Second operand has 2 states, 2 states have (on average 143.0) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:29,700 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:29,700 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 156 [2022-07-21 09:07:29,701 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:29,777 INFO L129 PetriNetUnfolder]: 41/279 cut-off events. [2022-07-21 09:07:29,777 INFO L130 PetriNetUnfolder]: For 50/51 co-relation queries the response was YES. [2022-07-21 09:07:29,779 INFO L84 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 279 events. 41/279 cut-off events. For 50/51 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 800 event pairs, 15 based on Foata normal form. 39/288 useless extension candidates. Maximal degree in co-relation 229. Up to 59 conditions per place. [2022-07-21 09:07:29,781 INFO L132 encePairwiseOnDemand]: 148/156 looper letters, 9 selfloop transitions, 0 changer transitions 4/134 dead transitions. [2022-07-21 09:07:29,781 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 134 transitions, 304 flow [2022-07-21 09:07:29,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:07:29,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:07:29,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 293 transitions. [2022-07-21 09:07:29,792 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9391025641025641 [2022-07-21 09:07:29,793 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 293 transitions. [2022-07-21 09:07:29,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 293 transitions. [2022-07-21 09:07:29,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:29,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 293 transitions. [2022-07-21 09:07:29,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 146.5) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:29,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:29,803 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:29,805 INFO L186 Difference]: Start difference. First operand has 140 places, 142 transitions, 302 flow. Second operand 2 states and 293 transitions. [2022-07-21 09:07:29,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 134 transitions, 304 flow [2022-07-21 09:07:29,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 134 transitions, 292 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-21 09:07:29,816 INFO L242 Difference]: Finished difference. Result has 135 places, 130 transitions, 266 flow [2022-07-21 09:07:29,818 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=266, PETRI_PLACES=135, PETRI_TRANSITIONS=130} [2022-07-21 09:07:29,821 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, -5 predicate places. [2022-07-21 09:07:29,822 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 130 transitions, 266 flow [2022-07-21 09:07:29,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 143.0) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:29,823 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:29,823 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:29,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:07:29,824 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:07:29,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:29,825 INFO L85 PathProgramCache]: Analyzing trace with hash 850791868, now seen corresponding path program 1 times [2022-07-21 09:07:29,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:29,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384367867] [2022-07-21 09:07:29,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:29,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:29,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:30,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:30,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384367867] [2022-07-21 09:07:30,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384367867] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:07:30,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:07:30,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:07:30,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909260555] [2022-07-21 09:07:30,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:07:30,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:07:30,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:30,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:07:30,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:07:30,218 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 156 [2022-07-21 09:07:30,223 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 130 transitions, 266 flow. Second operand has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:30,223 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:30,224 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 156 [2022-07-21 09:07:30,224 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:30,488 INFO L129 PetriNetUnfolder]: 175/636 cut-off events. [2022-07-21 09:07:30,488 INFO L130 PetriNetUnfolder]: For 39/40 co-relation queries the response was YES. [2022-07-21 09:07:30,493 INFO L84 FinitePrefix]: Finished finitePrefix Result has 941 conditions, 636 events. 175/636 cut-off events. For 39/40 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3280 event pairs, 63 based on Foata normal form. 1/589 useless extension candidates. Maximal degree in co-relation 938. Up to 132 conditions per place. [2022-07-21 09:07:30,496 INFO L132 encePairwiseOnDemand]: 148/156 looper letters, 48 selfloop transitions, 6 changer transitions 4/158 dead transitions. [2022-07-21 09:07:30,497 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 158 transitions, 447 flow [2022-07-21 09:07:30,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:07:30,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:07:30,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 737 transitions. [2022-07-21 09:07:30,503 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7873931623931624 [2022-07-21 09:07:30,504 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 737 transitions. [2022-07-21 09:07:30,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 737 transitions. [2022-07-21 09:07:30,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:30,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 737 transitions. [2022-07-21 09:07:30,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 122.83333333333333) internal successors, (737), 6 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:30,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 156.0) internal successors, (1092), 7 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:30,511 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 156.0) internal successors, (1092), 7 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:30,512 INFO L186 Difference]: Start difference. First operand has 135 places, 130 transitions, 266 flow. Second operand 6 states and 737 transitions. [2022-07-21 09:07:30,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 158 transitions, 447 flow [2022-07-21 09:07:30,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 158 transitions, 447 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:07:30,517 INFO L242 Difference]: Finished difference. Result has 139 places, 134 transitions, 302 flow [2022-07-21 09:07:30,517 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=302, PETRI_PLACES=139, PETRI_TRANSITIONS=134} [2022-07-21 09:07:30,518 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, -1 predicate places. [2022-07-21 09:07:30,518 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 134 transitions, 302 flow [2022-07-21 09:07:30,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:30,519 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:30,519 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:30,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:07:30,519 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:07:30,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:30,520 INFO L85 PathProgramCache]: Analyzing trace with hash -527469494, now seen corresponding path program 1 times [2022-07-21 09:07:30,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:30,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97125666] [2022-07-21 09:07:30,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:30,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:30,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:30,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97125666] [2022-07-21 09:07:30,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97125666] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:07:30,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:07:30,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 09:07:30,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045946221] [2022-07-21 09:07:30,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:07:30,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:07:30,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:30,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:07:30,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:07:30,682 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 156 [2022-07-21 09:07:30,683 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 134 transitions, 302 flow. Second operand has 7 states, 7 states have (on average 119.42857142857143) internal successors, (836), 7 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:30,683 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:30,684 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 156 [2022-07-21 09:07:30,684 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:31,053 INFO L129 PetriNetUnfolder]: 603/1708 cut-off events. [2022-07-21 09:07:31,053 INFO L130 PetriNetUnfolder]: For 77/83 co-relation queries the response was YES. [2022-07-21 09:07:31,060 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2863 conditions, 1708 events. 603/1708 cut-off events. For 77/83 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11742 event pairs, 312 based on Foata normal form. 0/1472 useless extension candidates. Maximal degree in co-relation 2856. Up to 606 conditions per place. [2022-07-21 09:07:31,068 INFO L132 encePairwiseOnDemand]: 147/156 looper letters, 47 selfloop transitions, 8 changer transitions 0/158 dead transitions. [2022-07-21 09:07:31,068 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 158 transitions, 468 flow [2022-07-21 09:07:31,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:07:31,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 09:07:31,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 984 transitions. [2022-07-21 09:07:31,072 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7884615384615384 [2022-07-21 09:07:31,072 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 984 transitions. [2022-07-21 09:07:31,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 984 transitions. [2022-07-21 09:07:31,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:31,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 984 transitions. [2022-07-21 09:07:31,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 123.0) internal successors, (984), 8 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:31,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 156.0) internal successors, (1404), 9 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:31,078 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 156.0) internal successors, (1404), 9 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:31,078 INFO L186 Difference]: Start difference. First operand has 139 places, 134 transitions, 302 flow. Second operand 8 states and 984 transitions. [2022-07-21 09:07:31,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 158 transitions, 468 flow [2022-07-21 09:07:31,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 158 transitions, 464 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-21 09:07:31,083 INFO L242 Difference]: Finished difference. Result has 145 places, 137 transitions, 334 flow [2022-07-21 09:07:31,083 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=334, PETRI_PLACES=145, PETRI_TRANSITIONS=137} [2022-07-21 09:07:31,084 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, 5 predicate places. [2022-07-21 09:07:31,084 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 137 transitions, 334 flow [2022-07-21 09:07:31,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 119.42857142857143) internal successors, (836), 7 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:31,085 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:31,086 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:31,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 09:07:31,086 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:07:31,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:31,087 INFO L85 PathProgramCache]: Analyzing trace with hash -2055474000, now seen corresponding path program 1 times [2022-07-21 09:07:31,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:31,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982402986] [2022-07-21 09:07:31,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:31,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:31,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:31,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:31,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982402986] [2022-07-21 09:07:31,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982402986] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:07:31,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:07:31,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-21 09:07:31,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027983745] [2022-07-21 09:07:31,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:07:31,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 09:07:31,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:31,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 09:07:31,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-21 09:07:31,303 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 156 [2022-07-21 09:07:31,304 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 137 transitions, 334 flow. Second operand has 11 states, 11 states have (on average 97.72727272727273) internal successors, (1075), 11 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:31,304 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:31,304 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 156 [2022-07-21 09:07:31,304 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:32,031 INFO L129 PetriNetUnfolder]: 1151/2547 cut-off events. [2022-07-21 09:07:32,032 INFO L130 PetriNetUnfolder]: For 295/322 co-relation queries the response was YES. [2022-07-21 09:07:32,039 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4729 conditions, 2547 events. 1151/2547 cut-off events. For 295/322 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18569 event pairs, 890 based on Foata normal form. 27/2259 useless extension candidates. Maximal degree in co-relation 4720. Up to 1488 conditions per place. [2022-07-21 09:07:32,051 INFO L132 encePairwiseOnDemand]: 143/156 looper letters, 70 selfloop transitions, 12 changer transitions 0/168 dead transitions. [2022-07-21 09:07:32,051 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 168 transitions, 570 flow [2022-07-21 09:07:32,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:07:32,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-21 09:07:32,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1211 transitions. [2022-07-21 09:07:32,055 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6469017094017094 [2022-07-21 09:07:32,056 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1211 transitions. [2022-07-21 09:07:32,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1211 transitions. [2022-07-21 09:07:32,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:32,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1211 transitions. [2022-07-21 09:07:32,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 100.91666666666667) internal successors, (1211), 12 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:32,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 156.0) internal successors, (2028), 13 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:32,068 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 156.0) internal successors, (2028), 13 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:32,068 INFO L186 Difference]: Start difference. First operand has 145 places, 137 transitions, 334 flow. Second operand 12 states and 1211 transitions. [2022-07-21 09:07:32,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 168 transitions, 570 flow [2022-07-21 09:07:32,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 168 transitions, 560 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:07:32,075 INFO L242 Difference]: Finished difference. Result has 157 places, 141 transitions, 375 flow [2022-07-21 09:07:32,076 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=375, PETRI_PLACES=157, PETRI_TRANSITIONS=141} [2022-07-21 09:07:32,077 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, 17 predicate places. [2022-07-21 09:07:32,077 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 141 transitions, 375 flow [2022-07-21 09:07:32,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 97.72727272727273) internal successors, (1075), 11 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:32,078 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:32,078 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:32,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 09:07:32,079 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:07:32,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:32,079 INFO L85 PathProgramCache]: Analyzing trace with hash -198156446, now seen corresponding path program 1 times [2022-07-21 09:07:32,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:32,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814306424] [2022-07-21 09:07:32,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:32,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:32,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:32,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:32,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:32,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814306424] [2022-07-21 09:07:32,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814306424] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:07:32,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:07:32,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:07:32,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273770600] [2022-07-21 09:07:32,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:07:32,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:07:32,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:32,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:07:32,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:07:32,253 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 156 [2022-07-21 09:07:32,254 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 141 transitions, 375 flow. Second operand has 10 states, 10 states have (on average 99.0) internal successors, (990), 10 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:32,254 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:32,255 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 156 [2022-07-21 09:07:32,255 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:32,691 INFO L129 PetriNetUnfolder]: 957/2002 cut-off events. [2022-07-21 09:07:32,691 INFO L130 PetriNetUnfolder]: For 427/445 co-relation queries the response was YES. [2022-07-21 09:07:32,710 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3965 conditions, 2002 events. 957/2002 cut-off events. For 427/445 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 13063 event pairs, 551 based on Foata normal form. 18/1826 useless extension candidates. Maximal degree in co-relation 3951. Up to 1109 conditions per place. [2022-07-21 09:07:32,720 INFO L132 encePairwiseOnDemand]: 143/156 looper letters, 53 selfloop transitions, 7 changer transitions 21/167 dead transitions. [2022-07-21 09:07:32,720 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 167 transitions, 599 flow [2022-07-21 09:07:32,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:07:32,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-21 09:07:32,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1220 transitions. [2022-07-21 09:07:32,724 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6517094017094017 [2022-07-21 09:07:32,724 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1220 transitions. [2022-07-21 09:07:32,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1220 transitions. [2022-07-21 09:07:32,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:32,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1220 transitions. [2022-07-21 09:07:32,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:32,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 156.0) internal successors, (2028), 13 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:32,731 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 156.0) internal successors, (2028), 13 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:32,731 INFO L186 Difference]: Start difference. First operand has 157 places, 141 transitions, 375 flow. Second operand 12 states and 1220 transitions. [2022-07-21 09:07:32,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 167 transitions, 599 flow [2022-07-21 09:07:32,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 167 transitions, 584 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-21 09:07:32,736 INFO L242 Difference]: Finished difference. Result has 164 places, 135 transitions, 340 flow [2022-07-21 09:07:32,737 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=340, PETRI_PLACES=164, PETRI_TRANSITIONS=135} [2022-07-21 09:07:32,737 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, 24 predicate places. [2022-07-21 09:07:32,737 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 135 transitions, 340 flow [2022-07-21 09:07:32,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 99.0) internal successors, (990), 10 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:32,738 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:32,738 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:32,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 09:07:32,739 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:07:32,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:32,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1924719290, now seen corresponding path program 1 times [2022-07-21 09:07:32,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:32,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299958103] [2022-07-21 09:07:32,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:32,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:07:32,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:32,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299958103] [2022-07-21 09:07:32,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299958103] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:32,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697584121] [2022-07-21 09:07:32,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:32,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:32,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:07:32,847 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:07:32,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:07:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:32,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:07:32,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:07:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:07:33,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:07:33,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:07:33,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697584121] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:33,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:07:33,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 18 [2022-07-21 09:07:33,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450930259] [2022-07-21 09:07:33,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:07:33,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:07:33,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:33,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:07:33,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-07-21 09:07:33,432 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 156 [2022-07-21 09:07:33,434 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 135 transitions, 340 flow. Second operand has 9 states, 9 states have (on average 112.33333333333333) internal successors, (1011), 9 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:33,434 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:33,434 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 156 [2022-07-21 09:07:33,434 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:34,059 INFO L129 PetriNetUnfolder]: 1785/3653 cut-off events. [2022-07-21 09:07:34,059 INFO L130 PetriNetUnfolder]: For 931/931 co-relation queries the response was YES. [2022-07-21 09:07:34,070 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7651 conditions, 3653 events. 1785/3653 cut-off events. For 931/931 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 27789 event pairs, 529 based on Foata normal form. 11/3569 useless extension candidates. Maximal degree in co-relation 7635. Up to 793 conditions per place. [2022-07-21 09:07:34,087 INFO L132 encePairwiseOnDemand]: 145/156 looper letters, 78 selfloop transitions, 17 changer transitions 0/191 dead transitions. [2022-07-21 09:07:34,088 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 191 transitions, 685 flow [2022-07-21 09:07:34,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:07:34,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-21 09:07:34,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1294 transitions. [2022-07-21 09:07:34,091 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.754079254079254 [2022-07-21 09:07:34,091 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1294 transitions. [2022-07-21 09:07:34,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1294 transitions. [2022-07-21 09:07:34,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:34,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1294 transitions. [2022-07-21 09:07:34,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 117.63636363636364) internal successors, (1294), 11 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:34,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:34,098 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:34,098 INFO L186 Difference]: Start difference. First operand has 164 places, 135 transitions, 340 flow. Second operand 11 states and 1294 transitions. [2022-07-21 09:07:34,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 191 transitions, 685 flow [2022-07-21 09:07:34,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 191 transitions, 624 flow, removed 23 selfloop flow, removed 14 redundant places. [2022-07-21 09:07:34,110 INFO L242 Difference]: Finished difference. Result has 153 places, 147 transitions, 403 flow [2022-07-21 09:07:34,111 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=403, PETRI_PLACES=153, PETRI_TRANSITIONS=147} [2022-07-21 09:07:34,111 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, 13 predicate places. [2022-07-21 09:07:34,112 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 147 transitions, 403 flow [2022-07-21 09:07:34,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 112.33333333333333) internal successors, (1011), 9 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:34,112 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:34,113 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:34,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 09:07:34,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-21 09:07:34,336 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:07:34,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:34,336 INFO L85 PathProgramCache]: Analyzing trace with hash -478381738, now seen corresponding path program 2 times [2022-07-21 09:07:34,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:34,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209758227] [2022-07-21 09:07:34,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:34,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:34,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:07:34,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:34,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209758227] [2022-07-21 09:07:34,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209758227] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:34,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034933349] [2022-07-21 09:07:34,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:07:34,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:34,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:07:34,452 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:07:34,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:07:34,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:07:34,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:07:34,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 09:07:34,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:07:34,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:07:34,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:07:34,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:07:34,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034933349] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:07:34,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:07:34,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 17 [2022-07-21 09:07:34,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905890840] [2022-07-21 09:07:34,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:07:34,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 09:07:34,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:34,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 09:07:34,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-07-21 09:07:34,756 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 156 [2022-07-21 09:07:34,758 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 147 transitions, 403 flow. Second operand has 17 states, 17 states have (on average 109.6470588235294) internal successors, (1864), 17 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:34,758 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:34,758 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 156 [2022-07-21 09:07:34,758 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:36,352 INFO L129 PetriNetUnfolder]: 3967/7607 cut-off events. [2022-07-21 09:07:36,352 INFO L130 PetriNetUnfolder]: For 2830/2867 co-relation queries the response was YES. [2022-07-21 09:07:36,378 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17618 conditions, 7607 events. 3967/7607 cut-off events. For 2830/2867 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 60936 event pairs, 288 based on Foata normal form. 22/7193 useless extension candidates. Maximal degree in co-relation 17606. Up to 742 conditions per place. [2022-07-21 09:07:36,419 INFO L132 encePairwiseOnDemand]: 140/156 looper letters, 219 selfloop transitions, 88 changer transitions 0/400 dead transitions. [2022-07-21 09:07:36,420 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 400 transitions, 1797 flow [2022-07-21 09:07:36,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 09:07:36,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-21 09:07:36,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2831 transitions. [2022-07-21 09:07:36,426 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7561431623931624 [2022-07-21 09:07:36,427 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2831 transitions. [2022-07-21 09:07:36,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2831 transitions. [2022-07-21 09:07:36,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:36,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2831 transitions. [2022-07-21 09:07:36,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 117.95833333333333) internal successors, (2831), 24 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:36,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 156.0) internal successors, (3900), 25 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:36,514 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 156.0) internal successors, (3900), 25 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:36,514 INFO L186 Difference]: Start difference. First operand has 153 places, 147 transitions, 403 flow. Second operand 24 states and 2831 transitions. [2022-07-21 09:07:36,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 400 transitions, 1797 flow [2022-07-21 09:07:36,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 400 transitions, 1792 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-21 09:07:36,561 INFO L242 Difference]: Finished difference. Result has 191 places, 228 transitions, 1139 flow [2022-07-21 09:07:36,562 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1139, PETRI_PLACES=191, PETRI_TRANSITIONS=228} [2022-07-21 09:07:36,562 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, 51 predicate places. [2022-07-21 09:07:36,562 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 228 transitions, 1139 flow [2022-07-21 09:07:36,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 109.6470588235294) internal successors, (1864), 17 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:36,563 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:36,564 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:36,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-21 09:07:36,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-07-21 09:07:36,777 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:07:36,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:36,777 INFO L85 PathProgramCache]: Analyzing trace with hash 2133670856, now seen corresponding path program 1 times [2022-07-21 09:07:36,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:36,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955706056] [2022-07-21 09:07:36,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:36,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:36,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:07:36,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:36,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955706056] [2022-07-21 09:07:36,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955706056] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:36,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805470897] [2022-07-21 09:07:36,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:36,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:36,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:07:36,896 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:07:36,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:07:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:36,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 09:07:36,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:07:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:07:37,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:07:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:07:37,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805470897] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:37,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:07:37,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-21 09:07:37,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803410802] [2022-07-21 09:07:37,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:07:37,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:07:37,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:37,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:07:37,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:07:37,243 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 156 [2022-07-21 09:07:37,244 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 228 transitions, 1139 flow. Second operand has 7 states, 7 states have (on average 119.57142857142857) internal successors, (837), 7 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:37,244 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:37,244 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 156 [2022-07-21 09:07:37,244 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:37,754 INFO L129 PetriNetUnfolder]: 1417/3348 cut-off events. [2022-07-21 09:07:37,755 INFO L130 PetriNetUnfolder]: For 12139/12713 co-relation queries the response was YES. [2022-07-21 09:07:37,774 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9866 conditions, 3348 events. 1417/3348 cut-off events. For 12139/12713 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 26563 event pairs, 351 based on Foata normal form. 173/3320 useless extension candidates. Maximal degree in co-relation 9836. Up to 1052 conditions per place. [2022-07-21 09:07:37,792 INFO L132 encePairwiseOnDemand]: 148/156 looper letters, 67 selfloop transitions, 24 changer transitions 0/247 dead transitions. [2022-07-21 09:07:37,793 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 247 transitions, 1452 flow [2022-07-21 09:07:37,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:07:37,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:07:37,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 852 transitions. [2022-07-21 09:07:37,796 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7802197802197802 [2022-07-21 09:07:37,796 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 852 transitions. [2022-07-21 09:07:37,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 852 transitions. [2022-07-21 09:07:37,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:37,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 852 transitions. [2022-07-21 09:07:37,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 121.71428571428571) internal successors, (852), 7 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:37,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:37,801 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:37,801 INFO L186 Difference]: Start difference. First operand has 191 places, 228 transitions, 1139 flow. Second operand 7 states and 852 transitions. [2022-07-21 09:07:37,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 247 transitions, 1452 flow [2022-07-21 09:07:37,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 247 transitions, 1406 flow, removed 7 selfloop flow, removed 8 redundant places. [2022-07-21 09:07:37,840 INFO L242 Difference]: Finished difference. Result has 190 places, 228 transitions, 1149 flow [2022-07-21 09:07:37,840 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1149, PETRI_PLACES=190, PETRI_TRANSITIONS=228} [2022-07-21 09:07:37,841 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, 50 predicate places. [2022-07-21 09:07:37,841 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 228 transitions, 1149 flow [2022-07-21 09:07:37,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 119.57142857142857) internal successors, (837), 7 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:37,842 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:37,842 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:37,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-21 09:07:38,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:38,068 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:07:38,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:38,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1272634738, now seen corresponding path program 3 times [2022-07-21 09:07:38,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:38,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884677589] [2022-07-21 09:07:38,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:38,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:38,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:38,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:38,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:38,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884677589] [2022-07-21 09:07:38,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884677589] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:38,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910566463] [2022-07-21 09:07:38,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:07:38,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:38,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:07:38,166 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:07:38,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:07:38,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 09:07:38,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:07:38,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:07:38,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:07:38,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:38,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:07:38,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:38,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910566463] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:07:38,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:07:38,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-07-21 09:07:38,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773929371] [2022-07-21 09:07:38,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:07:38,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 09:07:38,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:38,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 09:07:38,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-07-21 09:07:38,609 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 156 [2022-07-21 09:07:38,611 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 228 transitions, 1149 flow. Second operand has 18 states, 18 states have (on average 112.0) internal successors, (2016), 18 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:38,611 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:38,611 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 156 [2022-07-21 09:07:38,611 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:39,953 INFO L129 PetriNetUnfolder]: 3696/7312 cut-off events. [2022-07-21 09:07:39,954 INFO L130 PetriNetUnfolder]: For 14125/14444 co-relation queries the response was YES. [2022-07-21 09:07:39,992 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22825 conditions, 7312 events. 3696/7312 cut-off events. For 14125/14444 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 57903 event pairs, 547 based on Foata normal form. 105/7253 useless extension candidates. Maximal degree in co-relation 22797. Up to 1203 conditions per place. [2022-07-21 09:07:40,036 INFO L132 encePairwiseOnDemand]: 143/156 looper letters, 142 selfloop transitions, 124 changer transitions 0/379 dead transitions. [2022-07-21 09:07:40,037 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 379 transitions, 2569 flow [2022-07-21 09:07:40,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 09:07:40,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-21 09:07:40,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1753 transitions. [2022-07-21 09:07:40,041 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7491452991452991 [2022-07-21 09:07:40,041 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1753 transitions. [2022-07-21 09:07:40,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1753 transitions. [2022-07-21 09:07:40,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:40,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1753 transitions. [2022-07-21 09:07:40,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 116.86666666666666) internal successors, (1753), 15 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:40,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 156.0) internal successors, (2496), 16 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:40,051 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 156.0) internal successors, (2496), 16 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:40,052 INFO L186 Difference]: Start difference. First operand has 190 places, 228 transitions, 1149 flow. Second operand 15 states and 1753 transitions. [2022-07-21 09:07:40,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 379 transitions, 2569 flow [2022-07-21 09:07:40,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 379 transitions, 2534 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-21 09:07:40,144 INFO L242 Difference]: Finished difference. Result has 205 places, 295 transitions, 2092 flow [2022-07-21 09:07:40,145 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=1122, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2092, PETRI_PLACES=205, PETRI_TRANSITIONS=295} [2022-07-21 09:07:40,146 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, 65 predicate places. [2022-07-21 09:07:40,146 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 295 transitions, 2092 flow [2022-07-21 09:07:40,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 112.0) internal successors, (2016), 18 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:40,147 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:40,148 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:40,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 09:07:40,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:40,359 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)] === [2022-07-21 09:07:40,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:40,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1599724562, now seen corresponding path program 4 times [2022-07-21 09:07:40,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:40,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254937741] [2022-07-21 09:07:40,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:40,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:40,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:07:40,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:40,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254937741] [2022-07-21 09:07:40,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254937741] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:40,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698531611] [2022-07-21 09:07:40,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:07:40,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:40,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:07:40,469 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:07:40,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:07:40,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:07:40,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:07:40,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:07:40,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:07:40,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:07:40,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:07:40,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:07:40,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698531611] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:40,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:07:40,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 19 [2022-07-21 09:07:40,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917436581] [2022-07-21 09:07:40,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:07:40,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:07:40,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:40,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:07:40,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:07:40,922 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 156 [2022-07-21 09:07:40,923 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 295 transitions, 2092 flow. Second operand has 9 states, 9 states have (on average 112.33333333333333) internal successors, (1011), 9 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:40,923 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:40,923 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 156 [2022-07-21 09:07:40,923 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:41,980 INFO L129 PetriNetUnfolder]: 4090/8256 cut-off events. [2022-07-21 09:07:41,981 INFO L130 PetriNetUnfolder]: For 28344/28804 co-relation queries the response was YES. [2022-07-21 09:07:42,023 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29093 conditions, 8256 events. 4090/8256 cut-off events. For 28344/28804 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 68190 event pairs, 645 based on Foata normal form. 236/8329 useless extension candidates. Maximal degree in co-relation 29059. Up to 1978 conditions per place. [2022-07-21 09:07:42,066 INFO L132 encePairwiseOnDemand]: 143/156 looper letters, 135 selfloop transitions, 126 changer transitions 0/374 dead transitions. [2022-07-21 09:07:42,066 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 374 transitions, 3108 flow [2022-07-21 09:07:42,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:07:42,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-21 09:07:42,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1304 transitions. [2022-07-21 09:07:42,070 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7599067599067599 [2022-07-21 09:07:42,070 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1304 transitions. [2022-07-21 09:07:42,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1304 transitions. [2022-07-21 09:07:42,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:42,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1304 transitions. [2022-07-21 09:07:42,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 118.54545454545455) internal successors, (1304), 11 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:42,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:42,089 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:42,089 INFO L186 Difference]: Start difference. First operand has 205 places, 295 transitions, 2092 flow. Second operand 11 states and 1304 transitions. [2022-07-21 09:07:42,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 374 transitions, 3108 flow [2022-07-21 09:07:42,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 374 transitions, 3069 flow, removed 15 selfloop flow, removed 5 redundant places. [2022-07-21 09:07:42,294 INFO L242 Difference]: Finished difference. Result has 215 places, 317 transitions, 2786 flow [2022-07-21 09:07:42,295 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=2067, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2786, PETRI_PLACES=215, PETRI_TRANSITIONS=317} [2022-07-21 09:07:42,296 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, 75 predicate places. [2022-07-21 09:07:42,296 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 317 transitions, 2786 flow [2022-07-21 09:07:42,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 112.33333333333333) internal successors, (1011), 9 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:42,297 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:42,297 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:42,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 09:07:42,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 09:07:42,511 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:07:42,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:42,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1017724018, now seen corresponding path program 5 times [2022-07-21 09:07:42,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:42,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223027183] [2022-07-21 09:07:42,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:42,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:42,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:42,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223027183] [2022-07-21 09:07:42,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223027183] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:42,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956614790] [2022-07-21 09:07:42,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:07:42,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:42,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:07:42,607 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:07:42,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 09:07:42,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:07:42,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:07:42,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 09:07:42,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:07:42,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:07:42,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:07:42,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:07:42,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956614790] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:07:42,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:07:42,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 16 [2022-07-21 09:07:42,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315751343] [2022-07-21 09:07:42,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:07:42,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 09:07:42,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:42,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 09:07:42,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:07:42,904 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 156 [2022-07-21 09:07:42,905 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 317 transitions, 2786 flow. Second operand has 16 states, 16 states have (on average 109.8125) internal successors, (1757), 16 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:42,905 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:42,905 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 156 [2022-07-21 09:07:42,905 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:44,796 INFO L129 PetriNetUnfolder]: 5597/10705 cut-off events. [2022-07-21 09:07:44,796 INFO L130 PetriNetUnfolder]: For 60292/60543 co-relation queries the response was YES. [2022-07-21 09:07:44,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42805 conditions, 10705 events. 5597/10705 cut-off events. For 60292/60543 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 87513 event pairs, 698 based on Foata normal form. 50/10617 useless extension candidates. Maximal degree in co-relation 42766. Up to 1159 conditions per place. [2022-07-21 09:07:44,909 INFO L132 encePairwiseOnDemand]: 139/156 looper letters, 233 selfloop transitions, 237 changer transitions 0/563 dead transitions. [2022-07-21 09:07:44,910 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 563 transitions, 5305 flow [2022-07-21 09:07:44,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 09:07:44,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-21 09:07:44,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2811 transitions. [2022-07-21 09:07:44,915 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.750801282051282 [2022-07-21 09:07:44,916 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2811 transitions. [2022-07-21 09:07:44,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2811 transitions. [2022-07-21 09:07:44,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:44,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2811 transitions. [2022-07-21 09:07:44,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 117.125) internal successors, (2811), 24 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:44,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 156.0) internal successors, (3900), 25 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:44,927 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 156.0) internal successors, (3900), 25 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:44,927 INFO L186 Difference]: Start difference. First operand has 215 places, 317 transitions, 2786 flow. Second operand 24 states and 2811 transitions. [2022-07-21 09:07:44,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 563 transitions, 5305 flow [2022-07-21 09:07:45,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 563 transitions, 5187 flow, removed 12 selfloop flow, removed 6 redundant places. [2022-07-21 09:07:45,545 INFO L242 Difference]: Finished difference. Result has 244 places, 418 transitions, 4336 flow [2022-07-21 09:07:45,545 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=2708, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4336, PETRI_PLACES=244, PETRI_TRANSITIONS=418} [2022-07-21 09:07:45,546 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, 104 predicate places. [2022-07-21 09:07:45,546 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 418 transitions, 4336 flow [2022-07-21 09:07:45,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 109.8125) internal successors, (1757), 16 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:45,547 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:45,547 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:45,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 09:07:45,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:45,747 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:07:45,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:45,748 INFO L85 PathProgramCache]: Analyzing trace with hash 767769428, now seen corresponding path program 6 times [2022-07-21 09:07:45,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:45,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770358501] [2022-07-21 09:07:45,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:45,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:45,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:07:45,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:45,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770358501] [2022-07-21 09:07:45,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770358501] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:45,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400562500] [2022-07-21 09:07:45,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:07:45,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:45,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:07:45,857 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:07:45,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 09:07:45,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-21 09:07:45,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:07:45,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:07:45,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:07:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:07:46,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:07:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:07:46,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400562500] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:46,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:07:46,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2022-07-21 09:07:46,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931423467] [2022-07-21 09:07:46,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:07:46,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:07:46,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:46,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:07:46,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:07:46,313 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 156 [2022-07-21 09:07:46,313 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 418 transitions, 4336 flow. Second operand has 9 states, 9 states have (on average 112.33333333333333) internal successors, (1011), 9 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:46,314 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:46,314 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 156 [2022-07-21 09:07:46,314 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:47,645 INFO L129 PetriNetUnfolder]: 4091/8267 cut-off events. [2022-07-21 09:07:47,645 INFO L130 PetriNetUnfolder]: For 50188/50432 co-relation queries the response was YES. [2022-07-21 09:07:47,690 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34428 conditions, 8267 events. 4091/8267 cut-off events. For 50188/50432 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 68756 event pairs, 510 based on Foata normal form. 35/8138 useless extension candidates. Maximal degree in co-relation 34377. Up to 2583 conditions per place. [2022-07-21 09:07:47,739 INFO L132 encePairwiseOnDemand]: 144/156 looper letters, 129 selfloop transitions, 163 changer transitions 0/451 dead transitions. [2022-07-21 09:07:47,739 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 451 transitions, 5093 flow [2022-07-21 09:07:47,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:07:47,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 09:07:47,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1175 transitions. [2022-07-21 09:07:47,743 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7532051282051282 [2022-07-21 09:07:47,743 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1175 transitions. [2022-07-21 09:07:47,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1175 transitions. [2022-07-21 09:07:47,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:47,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1175 transitions. [2022-07-21 09:07:47,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 117.5) internal successors, (1175), 10 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:47,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 156.0) internal successors, (1716), 11 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:47,748 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 156.0) internal successors, (1716), 11 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:47,748 INFO L186 Difference]: Start difference. First operand has 244 places, 418 transitions, 4336 flow. Second operand 10 states and 1175 transitions. [2022-07-21 09:07:47,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 451 transitions, 5093 flow [2022-07-21 09:07:48,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 451 transitions, 4966 flow, removed 38 selfloop flow, removed 6 redundant places. [2022-07-21 09:07:48,122 INFO L242 Difference]: Finished difference. Result has 250 places, 421 transitions, 4826 flow [2022-07-21 09:07:48,122 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=4217, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4826, PETRI_PLACES=250, PETRI_TRANSITIONS=421} [2022-07-21 09:07:48,123 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, 110 predicate places. [2022-07-21 09:07:48,123 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 421 transitions, 4826 flow [2022-07-21 09:07:48,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 112.33333333333333) internal successors, (1011), 9 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:48,123 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:48,123 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:48,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 09:07:48,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:48,326 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:07:48,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:48,327 INFO L85 PathProgramCache]: Analyzing trace with hash 91891366, now seen corresponding path program 1 times [2022-07-21 09:07:48,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:48,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75104288] [2022-07-21 09:07:48,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:48,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:07:48,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:48,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75104288] [2022-07-21 09:07:48,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75104288] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:48,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810655175] [2022-07-21 09:07:48,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:48,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:48,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:07:48,819 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:07:48,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 09:07:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:48,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-21 09:07:48,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:07:49,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:07:49,409 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:07:49,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 09:07:49,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 09:07:50,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:07:50,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:07:50,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:07:50,470 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:07:50,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-07-21 09:07:50,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:50,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:07:51,253 WARN L833 $PredicateComparison]: unable to prove that (forall ((~M~0 Int) (v_ArrVal_332 (Array Int Int))) (or (not (< ~M~0 c_~N~0)) (< (+ ~M~0 1) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_332) c_~A~0.base))) (= (+ (select .cse0 c_~A~0.offset) c_~res1~0) (+ c_~res2~0 (select .cse0 (+ c_~A~0.offset (* ~M~0 4)))))))) is different from false [2022-07-21 09:07:51,324 WARN L833 $PredicateComparison]: unable to prove that (forall ((~M~0 Int) (v_ArrVal_331 (Array Int Int)) (v_ArrVal_332 (Array Int Int))) (or (not (< ~M~0 c_~N~0)) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_331) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_332) c_~A~0.base))) (= (+ c_~res1~0 (select .cse0 c_~A~0.offset)) (+ c_~res2~0 (select .cse0 (+ c_~A~0.offset (* ~M~0 4)))))) (< (+ ~M~0 1) c_~N~0))) is different from false [2022-07-21 09:07:51,411 WARN L833 $PredicateComparison]: unable to prove that (forall ((~M~0 Int) (v_ArrVal_331 (Array Int Int)) (v_ArrVal_330 (Array Int Int)) (v_ArrVal_332 (Array Int Int))) (or (not (< ~M~0 c_~N~0)) (let ((.cse0 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_330) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_331) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_332) c_~A~0.base))) (= (+ c_~res1~0 (select .cse0 c_~A~0.offset)) (+ (select .cse0 (+ c_~A~0.offset (* ~M~0 4))) c_~res2~0))) (< (+ ~M~0 1) c_~N~0))) is different from false [2022-07-21 09:07:51,529 WARN L833 $PredicateComparison]: unable to prove that (forall ((~M~0 Int) (v_ArrVal_331 (Array Int Int)) (v_ArrVal_330 (Array Int Int)) (v_ArrVal_332 (Array Int Int))) (or (not (< ~M~0 c_~N~0)) (let ((.cse0 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_330) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_331) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_332) |c_ULTIMATE.start_main_#t~ret12#1.base|))) (= (+ (select .cse0 |c_ULTIMATE.start_main_#t~ret12#1.offset|) c_~res1~0) (+ c_~res2~0 (select .cse0 (+ |c_ULTIMATE.start_main_#t~ret12#1.offset| (* ~M~0 4)))))) (< (+ ~M~0 1) c_~N~0))) is different from false [2022-07-21 09:07:51,555 WARN L833 $PredicateComparison]: unable to prove that (forall ((~M~0 Int) (v_ArrVal_331 (Array Int Int)) (v_ArrVal_330 (Array Int Int)) (v_ArrVal_332 (Array Int Int))) (or (not (< ~M~0 c_~N~0)) (let ((.cse0 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_330) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_331) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_332) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|))) (= (+ (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) c_~res1~0) (+ (select .cse0 (+ (* ~M~0 4) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|)) c_~res2~0))) (< (+ ~M~0 1) c_~N~0))) is different from false [2022-07-21 09:07:51,573 WARN L833 $PredicateComparison]: unable to prove that (forall ((~M~0 Int) (v_ArrVal_331 (Array Int Int)) (v_ArrVal_330 (Array Int Int)) (v_ArrVal_332 (Array Int Int))) (or (not (< ~M~0 c_~N~0)) (let ((.cse0 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_330) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_331) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_332) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (= (+ (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) c_~res1~0) (+ c_~res2~0 (select .cse0 (+ (* ~M~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) (< (+ ~M~0 1) c_~N~0))) is different from false [2022-07-21 09:07:51,847 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:07:51,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 50 [2022-07-21 09:07:51,859 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:07:51,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 806 treesize of output 770 [2022-07-21 09:07:51,876 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:07:51,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 379 treesize of output 360 [2022-07-21 09:07:51,890 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:07:51,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 726 treesize of output 610 [2022-07-21 09:07:51,906 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:07:51,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 598 treesize of output 546 [2022-07-21 09:07:55,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 09:07:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:55,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810655175] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:07:55,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:07:55,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 33, 31] total 75 [2022-07-21 09:07:55,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473242633] [2022-07-21 09:07:55,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:07:55,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-07-21 09:07:55,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:55,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-07-21 09:07:55,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=648, Invalid=4061, Unknown=7, NotChecked=834, Total=5550 [2022-07-21 09:07:55,025 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 156 [2022-07-21 09:07:55,028 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 421 transitions, 4826 flow. Second operand has 75 states, 75 states have (on average 54.72) internal successors, (4104), 75 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:55,028 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:55,028 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 156 [2022-07-21 09:07:55,028 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:08:30,576 INFO L129 PetriNetUnfolder]: 49411/79193 cut-off events. [2022-07-21 09:08:30,576 INFO L130 PetriNetUnfolder]: For 483460/483460 co-relation queries the response was YES. [2022-07-21 09:08:31,458 INFO L84 FinitePrefix]: Finished finitePrefix Result has 315311 conditions, 79193 events. 49411/79193 cut-off events. For 483460/483460 co-relation queries the response was YES. Maximal size of possible extension queue 3591. Compared 707085 event pairs, 6946 based on Foata normal form. 2/78969 useless extension candidates. Maximal degree in co-relation 315258. Up to 36860 conditions per place. [2022-07-21 09:08:31,838 INFO L132 encePairwiseOnDemand]: 104/156 looper letters, 1818 selfloop transitions, 1297 changer transitions 13/3173 dead transitions. [2022-07-21 09:08:31,839 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 3173 transitions, 41268 flow [2022-07-21 09:08:31,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-07-21 09:08:31,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2022-07-21 09:08:31,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 7293 transitions. [2022-07-21 09:08:31,853 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.3995726495726496 [2022-07-21 09:08:31,853 INFO L72 ComplementDD]: Start complementDD. Operand 117 states and 7293 transitions. [2022-07-21 09:08:31,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 7293 transitions. [2022-07-21 09:08:31,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:08:31,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 117 states and 7293 transitions. [2022-07-21 09:08:31,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 118 states, 117 states have (on average 62.333333333333336) internal successors, (7293), 117 states have internal predecessors, (7293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:31,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 118 states, 118 states have (on average 156.0) internal successors, (18408), 118 states have internal predecessors, (18408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:31,895 INFO L81 ComplementDD]: Finished complementDD. Result has 118 states, 118 states have (on average 156.0) internal successors, (18408), 118 states have internal predecessors, (18408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:31,896 INFO L186 Difference]: Start difference. First operand has 250 places, 421 transitions, 4826 flow. Second operand 117 states and 7293 transitions. [2022-07-21 09:08:31,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 3173 transitions, 41268 flow [2022-07-21 09:08:41,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 3173 transitions, 40521 flow, removed 106 selfloop flow, removed 7 redundant places. [2022-07-21 09:08:41,481 INFO L242 Difference]: Finished difference. Result has 437 places, 1915 transitions, 24773 flow [2022-07-21 09:08:41,482 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=4698, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=117, PETRI_FLOW=24773, PETRI_PLACES=437, PETRI_TRANSITIONS=1915} [2022-07-21 09:08:41,483 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, 297 predicate places. [2022-07-21 09:08:41,483 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 1915 transitions, 24773 flow [2022-07-21 09:08:41,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 54.72) internal successors, (4104), 75 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:41,484 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:08:41,484 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:08:41,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 09:08:41,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-21 09:08:41,708 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:08:41,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:08:41,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1068845516, now seen corresponding path program 1 times [2022-07-21 09:08:41,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:08:41,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682575597] [2022-07-21 09:08:41,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:08:41,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:08:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:08:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:08:42,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:08:42,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682575597] [2022-07-21 09:08:42,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682575597] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:08:42,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063725653] [2022-07-21 09:08:42,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:08:42,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:08:42,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:08:42,082 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:08:42,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 09:08:42,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:08:42,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-21 09:08:42,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:08:42,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:08:42,231 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 09:08:42,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 09:08:42,274 INFO L356 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-07-21 09:08:42,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 30 [2022-07-21 09:08:42,598 INFO L356 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-07-21 09:08:42,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 34 [2022-07-21 09:08:42,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 09:08:42,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:08:43,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:08:43,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:08:43,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-21 09:08:43,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-07-21 09:08:43,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:08:43,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:08:43,350 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_372 (Array Int Int))) (= c_~res1~0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_372) c_~A~0.base) c_~A~0.offset) c_~res2~0))) is different from false [2022-07-21 09:08:43,383 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_372 (Array Int Int))) (= |c_thread1Thread1of1ForFork0_~tmp~0#1| (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_372) c_~A~0.base) c_~A~0.offset) c_~res2~0))) is different from false [2022-07-21 09:08:43,388 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_372 (Array Int Int))) (= (+ (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) c_~res1~0) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_372) c_~A~0.base) c_~A~0.offset) c_~res2~0))) is different from false [2022-07-21 09:08:43,399 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_371 (Array Int Int)) (v_ArrVal_372 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_371))) (= (+ c_~res1~0 (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_372) c_~A~0.base) c_~A~0.offset) c_~res2~0)))) is different from false [2022-07-21 09:08:43,404 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_371 (Array Int Int)) (v_ArrVal_372 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_371))) (= (+ c_~res1~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset)) (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_372) c_~A~0.base) c_~A~0.offset) c_~res2~0)))) is different from false [2022-07-21 09:08:43,426 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_371 (Array Int Int)) (v_ArrVal_370 (Array Int Int)) (v_ArrVal_372 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_370) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_371))) (= (+ (select (select .cse0 c_~A~0.base) c_~A~0.offset) c_~res1~0) (+ c_~res2~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_372) c_~A~0.base) c_~A~0.offset))))) is different from false [2022-07-21 09:08:43,460 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_371 (Array Int Int)) (v_ArrVal_370 (Array Int Int)) (v_ArrVal_372 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_370) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_371))) (= (+ (select (select .cse0 |c_ULTIMATE.start_main_#t~ret12#1.base|) |c_ULTIMATE.start_main_#t~ret12#1.offset|) c_~res1~0) (+ c_~res2~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_372) |c_ULTIMATE.start_main_#t~ret12#1.base|) |c_ULTIMATE.start_main_#t~ret12#1.offset|))))) is different from false [2022-07-21 09:08:43,469 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_371 (Array Int Int)) (v_ArrVal_370 (Array Int Int)) (v_ArrVal_372 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_370) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_371))) (= (+ c_~res2~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_372) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|)) (+ c_~res1~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|))))) is different from false [2022-07-21 09:08:43,474 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_371 (Array Int Int)) (v_ArrVal_370 (Array Int Int)) (v_ArrVal_372 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_370) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_371))) (= (+ (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) c_~res1~0) (+ c_~res2~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_372) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) is different from false [2022-07-21 09:08:43,495 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:08:43,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 43 [2022-07-21 09:08:43,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2774 treesize of output 2582 [2022-07-21 09:08:43,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2582 treesize of output 2454 [2022-07-21 09:08:43,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2454 treesize of output 2262 [2022-07-21 09:08:43,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2262 treesize of output 2166 [2022-07-21 09:08:45,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-21 09:08:45,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063725653] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:08:45,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:08:45,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 22] total 52 [2022-07-21 09:08:45,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045444661] [2022-07-21 09:08:45,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:08:45,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-21 09:08:45,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:08:45,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-21 09:08:45,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1615, Unknown=9, NotChecked=810, Total=2652 [2022-07-21 09:08:45,224 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 156 [2022-07-21 09:08:45,226 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 1915 transitions, 24773 flow. Second operand has 52 states, 52 states have (on average 68.15384615384616) internal successors, (3544), 52 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:45,226 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:08:45,227 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 156 [2022-07-21 09:08:45,227 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand