./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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-max-array-hom.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 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:51:16,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:51:16,177 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:51:16,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:51:16,212 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:51:16,214 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:51:16,218 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:51:16,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:51:16,222 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:51:16,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:51:16,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:51:16,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:51:16,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:51:16,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:51:16,235 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:51:16,237 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:51:16,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:51:16,239 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:51:16,241 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:51:16,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:51:16,247 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:51:16,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:51:16,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:51:16,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:51:16,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:51:16,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:51:16,252 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:51:16,253 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:51:16,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:51:16,254 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:51:16,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:51:16,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:51:16,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:51:16,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:51:16,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:51:16,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:51:16,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:51:16,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:51:16,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:51:16,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:51:16,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:51:16,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:51:16,261 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:51:16,285 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:51:16,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:51:16,288 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:51:16,288 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:51:16,289 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:51:16,289 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:51:16,290 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:51:16,290 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:51:16,290 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:51:16,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:51:16,291 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:51:16,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:51:16,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:51:16,292 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:51:16,292 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:51:16,292 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:51:16,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:51:16,293 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:51:16,293 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:51:16,295 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:51:16,295 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:51:16,295 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:51:16,296 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:51:16,296 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:51:16,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:51:16,296 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:51:16,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:51:16,297 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:51:16,297 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:51:16,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:51:16,297 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:51:16,298 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:51:16,298 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:51:16,298 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c [2022-07-22 21:51:16,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:51:16,573 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:51:16,575 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:51:16,576 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:51:16,577 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:51:16,578 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2022-07-22 21:51:16,633 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87172fe50/ec7bc14da22b411a90dea7b3ee8cfdea/FLAGbf8ec918f [2022-07-22 21:51:16,978 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:51:16,978 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2022-07-22 21:51:16,984 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87172fe50/ec7bc14da22b411a90dea7b3ee8cfdea/FLAGbf8ec918f [2022-07-22 21:51:17,374 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87172fe50/ec7bc14da22b411a90dea7b3ee8cfdea [2022-07-22 21:51:17,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:51:17,377 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:51:17,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:51:17,382 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:51:17,385 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:51:17,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:51:17" (1/1) ... [2022-07-22 21:51:17,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fd26d4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:17, skipping insertion in model container [2022-07-22 21:51:17,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:51:17" (1/1) ... [2022-07-22 21:51:17,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:51:17,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:51:17,537 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-max-array-hom.wvr.c[2586,2599] [2022-07-22 21:51:17,544 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:51:17,552 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:51:17,570 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-max-array-hom.wvr.c[2586,2599] [2022-07-22 21:51:17,577 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:51:17,589 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:51:17,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:17 WrapperNode [2022-07-22 21:51:17,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:51:17,590 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:51:17,591 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:51:17,591 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:51:17,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:17" (1/1) ... [2022-07-22 21:51:17,604 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:17" (1/1) ... [2022-07-22 21:51:17,625 INFO L137 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 106 [2022-07-22 21:51:17,626 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:51:17,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:51:17,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:51:17,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:51:17,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:17" (1/1) ... [2022-07-22 21:51:17,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:17" (1/1) ... [2022-07-22 21:51:17,644 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:17" (1/1) ... [2022-07-22 21:51:17,645 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:17" (1/1) ... [2022-07-22 21:51:17,654 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:17" (1/1) ... [2022-07-22 21:51:17,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:17" (1/1) ... [2022-07-22 21:51:17,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:17" (1/1) ... [2022-07-22 21:51:17,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:51:17,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:51:17,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:51:17,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:51:17,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:17" (1/1) ... [2022-07-22 21:51:17,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:51:17,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:51:17,696 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) [2022-07-22 21:51:17,721 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 [2022-07-22 21:51:17,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:51:17,748 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:51:17,748 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:51:17,748 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:51:17,749 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:51:17,749 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-22 21:51:17,749 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-22 21:51:17,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:51:17,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:51:17,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:51:17,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:51:17,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:51:17,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 21:51:17,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:51:17,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:51:17,751 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:51:17,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:51:17,752 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:51:17,823 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:51:17,824 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:51:18,026 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:51:18,089 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:51:18,095 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-22 21:51:18,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:51:18 BoogieIcfgContainer [2022-07-22 21:51:18,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:51:18,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:51:18,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:51:18,124 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:51:18,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:51:17" (1/3) ... [2022-07-22 21:51:18,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4349d02c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:51:18, skipping insertion in model container [2022-07-22 21:51:18,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:17" (2/3) ... [2022-07-22 21:51:18,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4349d02c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:51:18, skipping insertion in model container [2022-07-22 21:51:18,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:51:18" (3/3) ... [2022-07-22 21:51:18,128 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array-hom.wvr.c [2022-07-22 21:51:18,132 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:51:18,141 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:51:18,141 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:51:18,142 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:51:18,216 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-22 21:51:18,270 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 156 places, 159 transitions, 342 flow [2022-07-22 21:51:18,345 INFO L129 PetriNetUnfolder]: 13/156 cut-off events. [2022-07-22 21:51:18,346 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:51:18,350 INFO L84 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 156 events. 13/156 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. 0/142 useless extension candidates. Maximal degree in co-relation 113. Up to 2 conditions per place. [2022-07-22 21:51:18,350 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 159 transitions, 342 flow [2022-07-22 21:51:18,355 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 145 transitions, 308 flow [2022-07-22 21:51:18,366 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:51:18,375 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@74e8f166, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@666d9e46 [2022-07-22 21:51:18,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-22 21:51:18,415 INFO L129 PetriNetUnfolder]: 13/144 cut-off events. [2022-07-22 21:51:18,415 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:51:18,416 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:51:18,416 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] [2022-07-22 21:51:18,421 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)] === [2022-07-22 21:51:18,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:51:18,425 INFO L85 PathProgramCache]: Analyzing trace with hash 379312160, now seen corresponding path program 1 times [2022-07-22 21:51:18,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:51:18,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550667340] [2022-07-22 21:51:18,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:18,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:51:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:51:18,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:51:18,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550667340] [2022-07-22 21:51:18,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550667340] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:51:18,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:51:18,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:51:18,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791618042] [2022-07-22 21:51:18,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:51:18,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:51:18,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:51:18,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:51:18,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:51:18,715 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 159 [2022-07-22 21:51:18,719 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 145 transitions, 308 flow. Second operand has 2 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:18,719 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:51:18,719 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 159 [2022-07-22 21:51:18,720 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:51:18,786 INFO L129 PetriNetUnfolder]: 42/270 cut-off events. [2022-07-22 21:51:18,787 INFO L130 PetriNetUnfolder]: For 50/51 co-relation queries the response was YES. [2022-07-22 21:51:18,789 INFO L84 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 270 events. 42/270 cut-off events. For 50/51 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 708 event pairs, 15 based on Foata normal form. 42/281 useless extension candidates. Maximal degree in co-relation 216. Up to 59 conditions per place. [2022-07-22 21:51:18,791 INFO L132 encePairwiseOnDemand]: 151/159 looper letters, 9 selfloop transitions, 0 changer transitions 4/137 dead transitions. [2022-07-22 21:51:18,791 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 137 transitions, 310 flow [2022-07-22 21:51:18,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:51:18,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:51:18,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 299 transitions. [2022-07-22 21:51:18,803 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.940251572327044 [2022-07-22 21:51:18,803 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 299 transitions. [2022-07-22 21:51:18,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 299 transitions. [2022-07-22 21:51:18,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:51:18,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 299 transitions. [2022-07-22 21:51:18,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 149.5) internal successors, (299), 2 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:18,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:18,815 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:18,817 INFO L186 Difference]: Start difference. First operand has 142 places, 145 transitions, 308 flow. Second operand 2 states and 299 transitions. [2022-07-22 21:51:18,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 137 transitions, 310 flow [2022-07-22 21:51:18,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 137 transitions, 298 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-22 21:51:18,824 INFO L242 Difference]: Finished difference. Result has 137 places, 133 transitions, 272 flow [2022-07-22 21:51:18,826 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=272, PETRI_PLACES=137, PETRI_TRANSITIONS=133} [2022-07-22 21:51:18,829 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, -5 predicate places. [2022-07-22 21:51:18,829 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 133 transitions, 272 flow [2022-07-22 21:51:18,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:18,830 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:51:18,831 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] [2022-07-22 21:51:18,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:51:18,831 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)] === [2022-07-22 21:51:18,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:51:18,833 INFO L85 PathProgramCache]: Analyzing trace with hash 191455911, now seen corresponding path program 1 times [2022-07-22 21:51:18,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:51:18,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559135656] [2022-07-22 21:51:18,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:18,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:51:18,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:51:19,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:51:19,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559135656] [2022-07-22 21:51:19,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559135656] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:51:19,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:51:19,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:51:19,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092142836] [2022-07-22 21:51:19,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:51:19,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:51:19,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:51:19,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:51:19,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:51:19,291 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 159 [2022-07-22 21:51:19,292 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 133 transitions, 272 flow. Second operand has 8 states, 8 states have (on average 104.5) internal successors, (836), 8 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) [2022-07-22 21:51:19,292 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:51:19,299 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 159 [2022-07-22 21:51:19,299 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:51:19,561 INFO L129 PetriNetUnfolder]: 296/684 cut-off events. [2022-07-22 21:51:19,561 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-22 21:51:19,566 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1143 conditions, 684 events. 296/684 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2962 event pairs, 167 based on Foata normal form. 1/515 useless extension candidates. Maximal degree in co-relation 1140. Up to 421 conditions per place. [2022-07-22 21:51:19,572 INFO L132 encePairwiseOnDemand]: 149/159 looper letters, 44 selfloop transitions, 6 changer transitions 4/141 dead transitions. [2022-07-22 21:51:19,572 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 141 transitions, 396 flow [2022-07-22 21:51:19,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:51:19,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:51:19,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 855 transitions. [2022-07-22 21:51:19,579 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6721698113207547 [2022-07-22 21:51:19,580 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 855 transitions. [2022-07-22 21:51:19,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 855 transitions. [2022-07-22 21:51:19,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:51:19,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 855 transitions. [2022-07-22 21:51:19,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 106.875) internal successors, (855), 8 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:19,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 159.0) internal successors, (1431), 9 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:19,589 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 159.0) internal successors, (1431), 9 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:19,589 INFO L186 Difference]: Start difference. First operand has 137 places, 133 transitions, 272 flow. Second operand 8 states and 855 transitions. [2022-07-22 21:51:19,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 141 transitions, 396 flow [2022-07-22 21:51:19,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 141 transitions, 396 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:51:19,597 INFO L242 Difference]: Finished difference. Result has 144 places, 134 transitions, 300 flow [2022-07-22 21:51:19,597 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=300, PETRI_PLACES=144, PETRI_TRANSITIONS=134} [2022-07-22 21:51:19,598 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 2 predicate places. [2022-07-22 21:51:19,599 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 134 transitions, 300 flow [2022-07-22 21:51:19,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 104.5) internal successors, (836), 8 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) [2022-07-22 21:51:19,600 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:51:19,600 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] [2022-07-22 21:51:19,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:51:19,608 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)] === [2022-07-22 21:51:19,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:51:19,611 INFO L85 PathProgramCache]: Analyzing trace with hash -553736524, now seen corresponding path program 1 times [2022-07-22 21:51:19,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:51:19,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660647263] [2022-07-22 21:51:19,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:19,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:51:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:19,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:51:19,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:51:19,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660647263] [2022-07-22 21:51:19,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660647263] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:51:19,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122723629] [2022-07-22 21:51:19,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:19,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:51:19,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:51:19,787 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) [2022-07-22 21:51:19,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:51:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:19,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:51:19,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:51:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:51:20,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:51:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:51:20,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122723629] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:51:20,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:51:20,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-22 21:51:20,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701217384] [2022-07-22 21:51:20,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:51:20,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:51:20,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:51:20,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:51:20,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:51:20,249 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 159 [2022-07-22 21:51:20,250 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 134 transitions, 300 flow. Second operand has 7 states, 7 states have (on average 122.42857142857143) internal successors, (857), 7 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:20,251 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:51:20,251 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 159 [2022-07-22 21:51:20,251 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:51:20,419 INFO L129 PetriNetUnfolder]: 183/623 cut-off events. [2022-07-22 21:51:20,420 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-22 21:51:20,423 INFO L84 FinitePrefix]: Finished finitePrefix Result has 949 conditions, 623 events. 183/623 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3079 event pairs, 80 based on Foata normal form. 0/532 useless extension candidates. Maximal degree in co-relation 941. Up to 141 conditions per place. [2022-07-22 21:51:20,427 INFO L132 encePairwiseOnDemand]: 151/159 looper letters, 33 selfloop transitions, 7 changer transitions 0/142 dead transitions. [2022-07-22 21:51:20,427 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 142 transitions, 398 flow [2022-07-22 21:51:20,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:51:20,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:51:20,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 873 transitions. [2022-07-22 21:51:20,430 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.784366576819407 [2022-07-22 21:51:20,430 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 873 transitions. [2022-07-22 21:51:20,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 873 transitions. [2022-07-22 21:51:20,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:51:20,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 873 transitions. [2022-07-22 21:51:20,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 124.71428571428571) internal successors, (873), 7 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:20,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 159.0) internal successors, (1272), 8 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:20,436 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 159.0) internal successors, (1272), 8 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:20,436 INFO L186 Difference]: Start difference. First operand has 144 places, 134 transitions, 300 flow. Second operand 7 states and 873 transitions. [2022-07-22 21:51:20,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 142 transitions, 398 flow [2022-07-22 21:51:20,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 142 transitions, 380 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-07-22 21:51:20,442 INFO L242 Difference]: Finished difference. Result has 144 places, 136 transitions, 315 flow [2022-07-22 21:51:20,442 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=282, 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=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=315, PETRI_PLACES=144, PETRI_TRANSITIONS=136} [2022-07-22 21:51:20,444 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 2 predicate places. [2022-07-22 21:51:20,444 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 136 transitions, 315 flow [2022-07-22 21:51:20,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 122.42857142857143) internal successors, (857), 7 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:20,445 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:51:20,445 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] [2022-07-22 21:51:20,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:51:20,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:51:20,667 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)] === [2022-07-22 21:51:20,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:51:20,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1840372881, now seen corresponding path program 1 times [2022-07-22 21:51:20,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:51:20,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962956664] [2022-07-22 21:51:20,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:20,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:51:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:20,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:51:20,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:51:20,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962956664] [2022-07-22 21:51:20,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962956664] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:51:20,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020332147] [2022-07-22 21:51:20,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:20,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:51:20,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:51:20,799 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) [2022-07-22 21:51:20,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:51:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:20,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:51:20,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:51:21,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:51:21,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:51:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:51:21,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020332147] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:51:21,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:51:21,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 18 [2022-07-22 21:51:21,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932839554] [2022-07-22 21:51:21,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:51:21,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 21:51:21,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:51:21,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 21:51:21,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:51:21,241 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 159 [2022-07-22 21:51:21,243 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 136 transitions, 315 flow. Second operand has 9 states, 9 states have (on average 115.33333333333333) internal successors, (1038), 9 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:21,243 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:51:21,244 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 159 [2022-07-22 21:51:21,244 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:51:21,602 INFO L129 PetriNetUnfolder]: 850/1566 cut-off events. [2022-07-22 21:51:21,603 INFO L130 PetriNetUnfolder]: For 646/901 co-relation queries the response was YES. [2022-07-22 21:51:21,607 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3303 conditions, 1566 events. 850/1566 cut-off events. For 646/901 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8601 event pairs, 213 based on Foata normal form. 255/1656 useless extension candidates. Maximal degree in co-relation 3295. Up to 429 conditions per place. [2022-07-22 21:51:21,616 INFO L132 encePairwiseOnDemand]: 148/159 looper letters, 84 selfloop transitions, 17 changer transitions 0/196 dead transitions. [2022-07-22 21:51:21,616 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 196 transitions, 688 flow [2022-07-22 21:51:21,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:51:21,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:51:21,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1327 transitions. [2022-07-22 21:51:21,620 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7587192681532304 [2022-07-22 21:51:21,620 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1327 transitions. [2022-07-22 21:51:21,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1327 transitions. [2022-07-22 21:51:21,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:51:21,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1327 transitions. [2022-07-22 21:51:21,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 120.63636363636364) internal successors, (1327), 11 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:21,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 159.0) internal successors, (1908), 12 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:21,627 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 159.0) internal successors, (1908), 12 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:21,627 INFO L186 Difference]: Start difference. First operand has 144 places, 136 transitions, 315 flow. Second operand 11 states and 1327 transitions. [2022-07-22 21:51:21,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 196 transitions, 688 flow [2022-07-22 21:51:21,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 196 transitions, 675 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:51:21,630 INFO L242 Difference]: Finished difference. Result has 154 places, 147 transitions, 395 flow [2022-07-22 21:51:21,630 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=395, PETRI_PLACES=154, PETRI_TRANSITIONS=147} [2022-07-22 21:51:21,631 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 12 predicate places. [2022-07-22 21:51:21,631 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 147 transitions, 395 flow [2022-07-22 21:51:21,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 115.33333333333333) internal successors, (1038), 9 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:21,632 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:51:21,632 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] [2022-07-22 21:51:21,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:51:21,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-22 21:51:21,850 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)] === [2022-07-22 21:51:21,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:51:21,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1817451035, now seen corresponding path program 2 times [2022-07-22 21:51:21,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:51:21,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338708628] [2022-07-22 21:51:21,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:21,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:51:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:21,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:51:21,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:51:21,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338708628] [2022-07-22 21:51:21,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338708628] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:51:21,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241317846] [2022-07-22 21:51:21,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:51:21,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:51:21,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:51:21,964 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) [2022-07-22 21:51:21,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:51:22,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 21:51:22,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:51:22,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 21:51:22,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:51:22,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:51:22,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:51:22,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241317846] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:51:22,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:51:22,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-07-22 21:51:22,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347746702] [2022-07-22 21:51:22,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:51:22,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:51:22,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:51:22,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:51:22,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:51:22,243 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 159 [2022-07-22 21:51:22,243 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 147 transitions, 395 flow. Second operand has 6 states, 6 states have (on average 112.5) internal successors, (675), 6 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:22,243 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:51:22,244 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 159 [2022-07-22 21:51:22,244 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:51:22,526 INFO L129 PetriNetUnfolder]: 608/1360 cut-off events. [2022-07-22 21:51:22,526 INFO L130 PetriNetUnfolder]: For 932/1135 co-relation queries the response was YES. [2022-07-22 21:51:22,530 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3077 conditions, 1360 events. 608/1360 cut-off events. For 932/1135 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7591 event pairs, 200 based on Foata normal form. 240/1566 useless extension candidates. Maximal degree in co-relation 3065. Up to 535 conditions per place. [2022-07-22 21:51:22,538 INFO L132 encePairwiseOnDemand]: 150/159 looper letters, 48 selfloop transitions, 13 changer transitions 0/160 dead transitions. [2022-07-22 21:51:22,538 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 160 transitions, 570 flow [2022-07-22 21:51:22,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:51:22,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:51:22,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 905 transitions. [2022-07-22 21:51:22,540 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7114779874213837 [2022-07-22 21:51:22,541 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 905 transitions. [2022-07-22 21:51:22,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 905 transitions. [2022-07-22 21:51:22,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:51:22,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 905 transitions. [2022-07-22 21:51:22,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.125) internal successors, (905), 8 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:22,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 159.0) internal successors, (1431), 9 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:22,545 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 159.0) internal successors, (1431), 9 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:22,545 INFO L186 Difference]: Start difference. First operand has 154 places, 147 transitions, 395 flow. Second operand 8 states and 905 transitions. [2022-07-22 21:51:22,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 160 transitions, 570 flow [2022-07-22 21:51:22,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 160 transitions, 563 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:51:22,551 INFO L242 Difference]: Finished difference. Result has 159 places, 150 transitions, 456 flow [2022-07-22 21:51:22,552 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=456, PETRI_PLACES=159, PETRI_TRANSITIONS=150} [2022-07-22 21:51:22,552 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 17 predicate places. [2022-07-22 21:51:22,552 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 150 transitions, 456 flow [2022-07-22 21:51:22,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 112.5) internal successors, (675), 6 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:22,553 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:51:22,553 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, 1, 1] [2022-07-22 21:51:22,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-22 21:51:22,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:51:22,767 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)] === [2022-07-22 21:51:22,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:51:22,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1490878222, now seen corresponding path program 1 times [2022-07-22 21:51:22,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:51:22,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915681426] [2022-07-22 21:51:22,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:22,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:51:22,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:23,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:51:23,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:51:23,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915681426] [2022-07-22 21:51:23,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915681426] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:51:23,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797078712] [2022-07-22 21:51:23,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:23,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:51:23,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:51:23,691 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) [2022-07-22 21:51:23,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:51:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:23,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-22 21:51:23,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:51:23,892 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 [2022-07-22 21:51:23,956 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-22 21:51:23,957 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 18 [2022-07-22 21:51:24,450 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:51:24,451 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 15 treesize of output 15 [2022-07-22 21:51:24,709 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 [2022-07-22 21:51:25,300 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 [2022-07-22 21:51:25,445 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 [2022-07-22 21:51:25,548 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 [2022-07-22 21:51:25,985 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:51:25,985 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 69 treesize of output 45 [2022-07-22 21:51:26,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:51:26,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:51:48,008 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:51:48,009 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 49 [2022-07-22 21:51:48,021 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:51:48,022 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 531 treesize of output 519 [2022-07-22 21:51:48,037 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:51:48,038 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 507 treesize of output 487 [2022-07-22 21:51:48,053 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:51:48,054 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 475 treesize of output 423 [2022-07-22 21:51:48,072 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:51:48,073 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 213 treesize of output 209 [2022-07-22 21:51:48,615 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:51:48,616 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 90 treesize of output 66 [2022-07-22 21:51:48,630 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-07-22 21:51:48,631 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 781 treesize of output 754 [2022-07-22 21:51:48,647 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-22 21:51:48,648 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 749 treesize of output 729 [2022-07-22 21:51:48,662 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-22 21:51:48,663 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 729 treesize of output 649 [2022-07-22 21:51:48,675 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-22 21:51:48,675 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 649 treesize of output 609 [2022-07-22 21:51:48,986 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-22 21:51:48,986 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 94 treesize of output 1 [2022-07-22 21:51:48,995 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-22 21:51:48,996 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 123 treesize of output 1 [2022-07-22 21:51:56,381 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 [2022-07-22 21:51:56,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:51:56,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797078712] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:51:56,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:51:56,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 33, 32] total 81 [2022-07-22 21:51:56,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688588039] [2022-07-22 21:51:56,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:51:56,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-07-22 21:51:56,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:51:56,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-07-22 21:51:56,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1156, Invalid=5204, Unknown=120, NotChecked=0, Total=6480 [2022-07-22 21:51:56,456 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 159 [2022-07-22 21:51:56,461 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 150 transitions, 456 flow. Second operand has 81 states, 81 states have (on average 61.51851851851852) internal successors, (4983), 81 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:56,461 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:51:56,461 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 159 [2022-07-22 21:51:56,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:52:04,201 INFO L129 PetriNetUnfolder]: 3974/7945 cut-off events. [2022-07-22 21:52:04,201 INFO L130 PetriNetUnfolder]: For 8030/8127 co-relation queries the response was YES. [2022-07-22 21:52:04,229 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19769 conditions, 7945 events. 3974/7945 cut-off events. For 8030/8127 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 65319 event pairs, 540 based on Foata normal form. 23/7849 useless extension candidates. Maximal degree in co-relation 19755. Up to 2330 conditions per place. [2022-07-22 21:52:04,273 INFO L132 encePairwiseOnDemand]: 119/159 looper letters, 295 selfloop transitions, 162 changer transitions 5/519 dead transitions. [2022-07-22 21:52:04,273 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 519 transitions, 2860 flow [2022-07-22 21:52:04,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-22 21:52:04,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-07-22 21:52:04,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3646 transitions. [2022-07-22 21:52:04,284 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.41692395654659803 [2022-07-22 21:52:04,284 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3646 transitions. [2022-07-22 21:52:04,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3646 transitions. [2022-07-22 21:52:04,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:52:04,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3646 transitions. [2022-07-22 21:52:04,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 66.2909090909091) internal successors, (3646), 55 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:04,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 159.0) internal successors, (8904), 56 states have internal predecessors, (8904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:04,315 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 159.0) internal successors, (8904), 56 states have internal predecessors, (8904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:04,316 INFO L186 Difference]: Start difference. First operand has 159 places, 150 transitions, 456 flow. Second operand 55 states and 3646 transitions. [2022-07-22 21:52:04,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 519 transitions, 2860 flow [2022-07-22 21:52:04,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 519 transitions, 2768 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-07-22 21:52:04,351 INFO L242 Difference]: Finished difference. Result has 232 places, 304 transitions, 1715 flow [2022-07-22 21:52:04,352 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=1715, PETRI_PLACES=232, PETRI_TRANSITIONS=304} [2022-07-22 21:52:04,354 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 90 predicate places. [2022-07-22 21:52:04,355 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 304 transitions, 1715 flow [2022-07-22 21:52:04,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 61.51851851851852) internal successors, (4983), 81 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:04,357 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:52:04,357 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, 1, 1] [2022-07-22 21:52:04,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:52:04,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:52:04,581 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)] === [2022-07-22 21:52:04,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:52:04,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1879185334, now seen corresponding path program 2 times [2022-07-22 21:52:04,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:52:04,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105150671] [2022-07-22 21:52:04,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:52:04,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:52:04,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:52:05,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:05,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:52:05,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105150671] [2022-07-22 21:52:05,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105150671] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:52:05,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46829986] [2022-07-22 21:52:05,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:52:05,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:52:05,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:52:05,708 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) [2022-07-22 21:52:05,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:52:05,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:52:05,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:52:05,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-22 21:52:05,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:52:05,861 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 [2022-07-22 21:52:05,918 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-22 21:52:05,919 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 18 [2022-07-22 21:52:05,980 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-22 21:52:05,980 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 16 treesize of output 22 [2022-07-22 21:52:06,317 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:52:06,317 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 18 treesize of output 18 [2022-07-22 21:52:06,483 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 11 treesize of output 7 [2022-07-22 21:52:06,761 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 [2022-07-22 21:52:07,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:52:07,112 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 35 treesize of output 33 [2022-07-22 21:52:07,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:52:07,302 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 35 treesize of output 33 [2022-07-22 21:52:07,640 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:52:07,640 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 69 treesize of output 45 [2022-07-22 21:52:08,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:08,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:52:10,961 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse4 (< c_~max2~0 c_~max3~0))) (and (forall ((v_ArrVal_201 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_201) |c_ULTIMATE.start_main_#t~ret12#1.base|) |c_ULTIMATE.start_main_#t~ret12#1.offset|))) (or (= .cse0 c_~max2~0) (forall ((~M~0 Int) (v_ArrVal_203 (Array Int Int)) (v_ArrVal_202 (Array Int Int))) (let ((.cse1 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_201) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_202) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_203) |c_ULTIMATE.start_main_#t~ret12#1.base|) (+ |c_ULTIMATE.start_main_#t~ret12#1.offset| (* ~M~0 4))))) (or (<= (+ ~M~0 1) 0) (< c_~max2~0 .cse1) (not (< c_~max3~0 .cse1)) (<= 1 ~M~0)))) (not (< c_~max1~0 .cse0))))) (or (forall ((~M~0 Int) (v_ArrVal_201 (Array Int Int)) (v_ArrVal_203 (Array Int Int)) (v_ArrVal_202 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_201))) (let ((.cse2 (select (select .cse3 |c_ULTIMATE.start_main_#t~ret12#1.base|) |c_ULTIMATE.start_main_#t~ret12#1.offset|))) (or (<= (+ ~M~0 1) 0) (= .cse2 c_~max2~0) (not (< c_~max1~0 .cse2)) (< c_~max3~0 (select (select (store (store .cse3 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_202) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_203) |c_ULTIMATE.start_main_#t~ret12#1.base|) (+ |c_ULTIMATE.start_main_#t~ret12#1.offset| (* ~M~0 4)))) (<= 1 ~M~0))))) .cse4) (or (and (or (forall ((~M~0 Int) (v_ArrVal_201 (Array Int Int)) (v_ArrVal_203 (Array Int Int)) (v_ArrVal_202 (Array Int Int))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_201))) (or (<= (+ ~M~0 1) 0) (< c_~max1~0 (select (select .cse5 |c_ULTIMATE.start_main_#t~ret12#1.base|) |c_ULTIMATE.start_main_#t~ret12#1.offset|)) (< c_~max3~0 (select (select (store (store .cse5 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_202) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_203) |c_ULTIMATE.start_main_#t~ret12#1.base|) (+ |c_ULTIMATE.start_main_#t~ret12#1.offset| (* ~M~0 4)))) (<= 1 ~M~0)))) .cse4) (forall ((v_ArrVal_201 (Array Int Int))) (or (forall ((~M~0 Int) (v_ArrVal_203 (Array Int Int)) (v_ArrVal_202 (Array Int Int))) (let ((.cse6 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_201) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_202) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_203) |c_ULTIMATE.start_main_#t~ret12#1.base|) (+ |c_ULTIMATE.start_main_#t~ret12#1.offset| (* ~M~0 4))))) (or (<= (+ ~M~0 1) 0) (< c_~max2~0 .cse6) (not (< c_~max3~0 .cse6)) (<= 1 ~M~0)))) (< c_~max1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_201) |c_ULTIMATE.start_main_#t~ret12#1.base|) |c_ULTIMATE.start_main_#t~ret12#1.offset|))))) (= c_~max1~0 c_~max2~0)))) is different from false [2022-07-22 21:52:12,121 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:52:12,122 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 88 treesize of output 64 [2022-07-22 21:52:12,132 INFO L356 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-07-22 21:52:12,132 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 1265 treesize of output 1201 [2022-07-22 21:52:12,152 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 1180 treesize of output 1084 [2022-07-22 21:52:12,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:52:12,165 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 831 treesize of output 781 [2022-07-22 21:52:12,182 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 1036 treesize of output 844 [2022-07-22 21:52:24,326 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:52:24,327 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 55 treesize of output 43 [2022-07-22 21:52:24,338 INFO L356 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-07-22 21:52:24,338 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 319 treesize of output 303 [2022-07-22 21:52:24,345 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 282 treesize of output 234 [2022-07-22 21:52:24,350 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 234 treesize of output 210 [2022-07-22 21:52:24,360 INFO L356 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-07-22 21:52:24,360 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 121 treesize of output 111 [2022-07-22 21:52:24,516 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:52:24,516 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 78 treesize of output 54 [2022-07-22 21:52:24,528 INFO L356 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-07-22 21:52:24,529 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 189 treesize of output 177 [2022-07-22 21:52:24,536 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 136 treesize of output 112 [2022-07-22 21:52:24,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:52:24,541 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 78 [2022-07-22 21:52:24,545 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 106 treesize of output 94 [2022-07-22 21:52:24,646 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-22 21:52:24,646 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 111 treesize of output 1 [2022-07-22 21:52:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:25,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46829986] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:52:25,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:52:25,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 32] total 82 [2022-07-22 21:52:25,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766148889] [2022-07-22 21:52:25,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:52:25,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-07-22 21:52:25,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:52:25,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-07-22 21:52:25,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1079, Invalid=5353, Unknown=52, NotChecked=158, Total=6642 [2022-07-22 21:52:25,534 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 159 [2022-07-22 21:52:25,539 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 304 transitions, 1715 flow. Second operand has 82 states, 82 states have (on average 60.52439024390244) internal successors, (4963), 82 states have internal predecessors, (4963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:25,539 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:52:25,539 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 159 [2022-07-22 21:52:25,539 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:52:35,865 INFO L129 PetriNetUnfolder]: 7425/14314 cut-off events. [2022-07-22 21:52:35,866 INFO L130 PetriNetUnfolder]: For 26813/27203 co-relation queries the response was YES. [2022-07-22 21:52:35,945 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44187 conditions, 14314 events. 7425/14314 cut-off events. For 26813/27203 co-relation queries the response was YES. Maximal size of possible extension queue 965. Compared 127014 event pairs, 385 based on Foata normal form. 151/14328 useless extension candidates. Maximal degree in co-relation 44150. Up to 3992 conditions per place. [2022-07-22 21:52:36,027 INFO L132 encePairwiseOnDemand]: 113/159 looper letters, 493 selfloop transitions, 400 changer transitions 20/969 dead transitions. [2022-07-22 21:52:36,027 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 969 transitions, 7189 flow [2022-07-22 21:52:36,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-22 21:52:36,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2022-07-22 21:52:36,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 6218 transitions. [2022-07-22 21:52:36,042 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4073637316561845 [2022-07-22 21:52:36,043 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 6218 transitions. [2022-07-22 21:52:36,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 6218 transitions. [2022-07-22 21:52:36,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:52:36,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 6218 transitions. [2022-07-22 21:52:36,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 64.77083333333333) internal successors, (6218), 96 states have internal predecessors, (6218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:36,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 159.0) internal successors, (15423), 97 states have internal predecessors, (15423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:36,103 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 159.0) internal successors, (15423), 97 states have internal predecessors, (15423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:36,104 INFO L186 Difference]: Start difference. First operand has 232 places, 304 transitions, 1715 flow. Second operand 96 states and 6218 transitions. [2022-07-22 21:52:36,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 969 transitions, 7189 flow [2022-07-22 21:52:36,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 969 transitions, 7049 flow, removed 25 selfloop flow, removed 16 redundant places. [2022-07-22 21:52:36,484 INFO L242 Difference]: Finished difference. Result has 355 places, 573 transitions, 4951 flow [2022-07-22 21:52:36,484 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=1658, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=4951, PETRI_PLACES=355, PETRI_TRANSITIONS=573} [2022-07-22 21:52:36,485 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 213 predicate places. [2022-07-22 21:52:36,485 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 573 transitions, 4951 flow [2022-07-22 21:52:36,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 60.52439024390244) internal successors, (4963), 82 states have internal predecessors, (4963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:36,486 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:52:36,486 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, 1, 1] [2022-07-22 21:52:36,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:52:36,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:52:36,696 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)] === [2022-07-22 21:52:36,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:52:36,696 INFO L85 PathProgramCache]: Analyzing trace with hash 153501318, now seen corresponding path program 3 times [2022-07-22 21:52:36,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:52:36,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7991835] [2022-07-22 21:52:36,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:52:36,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:52:36,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:52:38,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:38,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:52:38,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7991835] [2022-07-22 21:52:38,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7991835] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:52:38,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890631435] [2022-07-22 21:52:38,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:52:38,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:52:38,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:52:38,154 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) [2022-07-22 21:52:38,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:52:38,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 21:52:38,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:52:38,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-22 21:52:38,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:52:39,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:52:39,067 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 47 treesize of output 45 [2022-07-22 21:52:39,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:52:39,390 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 35 treesize of output 33 [2022-07-22 21:52:39,601 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:52:39,601 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 69 treesize of output 45 [2022-07-22 21:52:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:52:40,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:52:41,397 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:52:41,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 437 treesize of output 421 [2022-07-22 21:52:41,408 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 350 treesize of output 344 [2022-07-22 21:52:41,415 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 344 treesize of output 332 [2022-07-22 21:52:41,421 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 332 treesize of output 284 [2022-07-22 21:52:41,428 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 284 treesize of output 260 [2022-07-22 21:52:42,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:52:42,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890631435] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:52:42,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:52:42,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 28, 28] total 78 [2022-07-22 21:52:42,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733916040] [2022-07-22 21:52:42,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:52:42,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-07-22 21:52:42,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:52:42,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-07-22 21:52:42,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1196, Invalid=4804, Unknown=6, NotChecked=0, Total=6006 [2022-07-22 21:52:42,453 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 159 [2022-07-22 21:52:42,457 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 573 transitions, 4951 flow. Second operand has 78 states, 78 states have (on average 59.717948717948715) internal successors, (4658), 78 states have internal predecessors, (4658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:42,457 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:52:42,457 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 159 [2022-07-22 21:52:42,457 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:53:01,225 INFO L129 PetriNetUnfolder]: 21881/37141 cut-off events. [2022-07-22 21:53:01,225 INFO L130 PetriNetUnfolder]: For 171350/172591 co-relation queries the response was YES. [2022-07-22 21:53:01,999 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155864 conditions, 37141 events. 21881/37141 cut-off events. For 171350/172591 co-relation queries the response was YES. Maximal size of possible extension queue 2226. Compared 330131 event pairs, 1530 based on Foata normal form. 668/37324 useless extension candidates. Maximal degree in co-relation 155784. Up to 11159 conditions per place. [2022-07-22 21:53:02,211 INFO L132 encePairwiseOnDemand]: 108/159 looper letters, 945 selfloop transitions, 955 changer transitions 25/1978 dead transitions. [2022-07-22 21:53:02,212 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 1978 transitions, 20160 flow [2022-07-22 21:53:02,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-07-22 21:53:02,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2022-07-22 21:53:02,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 7690 transitions. [2022-07-22 21:53:02,226 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4098710158831681 [2022-07-22 21:53:02,226 INFO L72 ComplementDD]: Start complementDD. Operand 118 states and 7690 transitions. [2022-07-22 21:53:02,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 7690 transitions. [2022-07-22 21:53:02,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:53:02,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 118 states and 7690 transitions. [2022-07-22 21:53:02,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 119 states, 118 states have (on average 65.16949152542372) internal successors, (7690), 118 states have internal predecessors, (7690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:02,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 119 states, 119 states have (on average 159.0) internal successors, (18921), 119 states have internal predecessors, (18921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:02,266 INFO L81 ComplementDD]: Finished complementDD. Result has 119 states, 119 states have (on average 159.0) internal successors, (18921), 119 states have internal predecessors, (18921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:02,266 INFO L186 Difference]: Start difference. First operand has 355 places, 573 transitions, 4951 flow. Second operand 118 states and 7690 transitions. [2022-07-22 21:53:02,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 1978 transitions, 20160 flow [2022-07-22 21:53:06,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 1978 transitions, 19634 flow, removed 189 selfloop flow, removed 43 redundant places. [2022-07-22 21:53:06,908 INFO L242 Difference]: Finished difference. Result has 472 places, 1263 transitions, 15418 flow [2022-07-22 21:53:06,908 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=4723, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=118, PETRI_FLOW=15418, PETRI_PLACES=472, PETRI_TRANSITIONS=1263} [2022-07-22 21:53:06,909 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 330 predicate places. [2022-07-22 21:53:06,909 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 1263 transitions, 15418 flow [2022-07-22 21:53:06,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 59.717948717948715) internal successors, (4658), 78 states have internal predecessors, (4658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:06,911 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:53:06,911 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, 1, 1] [2022-07-22 21:53:06,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 21:53:07,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:53:07,135 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)] === [2022-07-22 21:53:07,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:53:07,135 INFO L85 PathProgramCache]: Analyzing trace with hash -690058456, now seen corresponding path program 1 times [2022-07-22 21:53:07,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:53:07,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91785763] [2022-07-22 21:53:07,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:07,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:53:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:08,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:53:08,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:53:08,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91785763] [2022-07-22 21:53:08,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91785763] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:53:08,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849517700] [2022-07-22 21:53:08,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:08,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:53:08,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:53:08,009 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) [2022-07-22 21:53:08,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 21:53:08,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:08,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-22 21:53:08,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:53:08,196 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 [2022-07-22 21:53:08,397 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:53:08,398 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 [2022-07-22 21:53:09,254 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 27 treesize of output 27 [2022-07-22 21:53:09,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 21:53:09,475 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:53:09,476 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 55 treesize of output 32 [2022-07-22 21:53:09,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:53:09,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:53:09,873 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_271 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_271) c_~A~0.base) (+ c_~A~0.offset (* 4 c_~M~0))))) (or (= c_~max1~0 .cse0) (not (< c_~max2~0 .cse0)) (not (< c_~max3~0 .cse0))))) (or (not (< c_~max2~0 c_~max3~0)) (= c_~max1~0 c_~max3~0) (forall ((v_ArrVal_271 (Array Int Int))) (< c_~max3~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_271) c_~A~0.base) (+ c_~A~0.offset (* 4 c_~M~0))))))) is different from false [2022-07-22 21:53:09,942 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:53:09,943 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 179 treesize of output 139 [2022-07-22 21:53:09,947 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 100 treesize of output 82 [2022-07-22 21:53:09,951 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 82 treesize of output 76 [2022-07-22 21:53:11,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-22 21:53:11,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849517700] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:53:11,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:53:11,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 79 [2022-07-22 21:53:11,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757590326] [2022-07-22 21:53:11,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:53:11,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-07-22 21:53:11,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:53:11,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-07-22 21:53:11,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=779, Invalid=5230, Unknown=1, NotChecked=152, Total=6162 [2022-07-22 21:53:12,001 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 159 [2022-07-22 21:53:12,004 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 1263 transitions, 15418 flow. Second operand has 79 states, 79 states have (on average 60.75949367088607) internal successors, (4800), 79 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:12,004 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:53:12,005 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 159 [2022-07-22 21:53:12,005 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:53:33,253 INFO L129 PetriNetUnfolder]: 30834/54112 cut-off events. [2022-07-22 21:53:33,253 INFO L130 PetriNetUnfolder]: For 614349/617140 co-relation queries the response was YES. [2022-07-22 21:53:34,794 INFO L84 FinitePrefix]: Finished finitePrefix Result has 295140 conditions, 54112 events. 30834/54112 cut-off events. For 614349/617140 co-relation queries the response was YES. Maximal size of possible extension queue 3144. Compared 526611 event pairs, 2906 based on Foata normal form. 1065/54401 useless extension candidates. Maximal degree in co-relation 295023. Up to 15426 conditions per place. [2022-07-22 21:53:35,193 INFO L132 encePairwiseOnDemand]: 110/159 looper letters, 1319 selfloop transitions, 1005 changer transitions 51/2427 dead transitions. [2022-07-22 21:53:35,194 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 2427 transitions, 34206 flow [2022-07-22 21:53:35,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-07-22 21:53:35,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2022-07-22 21:53:35,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 5623 transitions. [2022-07-22 21:53:35,201 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.42100928421683137 [2022-07-22 21:53:35,201 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 5623 transitions. [2022-07-22 21:53:35,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 5623 transitions. [2022-07-22 21:53:35,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:53:35,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 5623 transitions. [2022-07-22 21:53:35,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 66.94047619047619) internal successors, (5623), 84 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:35,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 159.0) internal successors, (13515), 85 states have internal predecessors, (13515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:35,223 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 159.0) internal successors, (13515), 85 states have internal predecessors, (13515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:35,223 INFO L186 Difference]: Start difference. First operand has 472 places, 1263 transitions, 15418 flow. Second operand 84 states and 5623 transitions. [2022-07-22 21:53:35,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 2427 transitions, 34206 flow [2022-07-22 21:53:54,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 2427 transitions, 33297 flow, removed 421 selfloop flow, removed 39 redundant places. [2022-07-22 21:53:54,325 INFO L242 Difference]: Finished difference. Result has 551 places, 1762 transitions, 25770 flow [2022-07-22 21:53:54,326 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=14917, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=539, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=25770, PETRI_PLACES=551, PETRI_TRANSITIONS=1762} [2022-07-22 21:53:54,327 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 409 predicate places. [2022-07-22 21:53:54,327 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 1762 transitions, 25770 flow [2022-07-22 21:53:54,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 60.75949367088607) internal successors, (4800), 79 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:54,328 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:53:54,328 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, 1, 1] [2022-07-22 21:53:54,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 21:53:54,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:53:54,552 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)] === [2022-07-22 21:53:54,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:53:54,552 INFO L85 PathProgramCache]: Analyzing trace with hash -727238638, now seen corresponding path program 4 times [2022-07-22 21:53:54,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:53:54,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156797592] [2022-07-22 21:53:54,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:54,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:53:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:55,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:53:55,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:53:55,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156797592] [2022-07-22 21:53:55,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156797592] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:53:55,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076076098] [2022-07-22 21:53:55,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:53:55,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:53:55,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:53:55,163 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) [2022-07-22 21:53:55,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 21:53:55,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:53:55,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:53:55,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-22 21:53:55,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:53:56,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:53:56,487 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 35 treesize of output 33 [2022-07-22 21:53:56,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 21:53:56,740 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:53:56,741 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 63 treesize of output 36 [2022-07-22 21:53:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:53:56,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:53:57,245 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:53:57,245 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 143 treesize of output 111 [2022-07-22 21:53:57,251 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 72 treesize of output 66 [2022-07-22 21:53:57,254 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 66 treesize of output 54 [2022-07-22 21:53:58,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:53:58,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076076098] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:53:58,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:53:58,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 69 [2022-07-22 21:53:58,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237341839] [2022-07-22 21:53:58,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:53:58,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-07-22 21:53:58,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:53:58,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-07-22 21:53:58,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=684, Invalid=4007, Unknown=1, NotChecked=0, Total=4692 [2022-07-22 21:53:58,513 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 159 [2022-07-22 21:53:58,515 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 1762 transitions, 25770 flow. Second operand has 69 states, 69 states have (on average 57.08695652173913) internal successors, (3939), 69 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:58,515 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:53:58,515 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 159 [2022-07-22 21:53:58,515 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand