./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-min-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-min-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 ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:51:22,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:51:22,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:51:22,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:51:22,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:51:22,142 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:51:22,143 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:51:22,147 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:51:22,148 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:51:22,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:51:22,150 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:51:22,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:51:22,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:51:22,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:51:22,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:51:22,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:51:22,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:51:22,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:51:22,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:51:22,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:51:22,168 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:51:22,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:51:22,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:51:22,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:51:22,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:51:22,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:51:22,173 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:51:22,173 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:51:22,174 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:51:22,174 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:51:22,175 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:51:22,175 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:51:22,176 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:51:22,176 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:51:22,177 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:51:22,178 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:51:22,178 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:51:22,179 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:51:22,179 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:51:22,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:51:22,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:51:22,181 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:51:22,181 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:51:22,205 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:51:22,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:51:22,206 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:51:22,206 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:51:22,206 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:51:22,207 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:51:22,207 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:51:22,207 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:51:22,208 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:51:22,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:51:22,209 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:51:22,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:51:22,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:51:22,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:51:22,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:51:22,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:51:22,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:51:22,210 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:51:22,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:51:22,210 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:51:22,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:51:22,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:51:22,211 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:51:22,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:51:22,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:51:22,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:51:22,212 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:51:22,212 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:51:22,212 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:51:22,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:51:22,212 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:51:22,213 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:51:22,213 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:51:22,213 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 [2022-07-22 21:51:22,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:51:22,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:51:22,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:51:22,456 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:51:22,457 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:51:22,457 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2022-07-22 21:51:22,514 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04bb879a8/4c1b074986884724ba3d46d08efb66b3/FLAG83b428312 [2022-07-22 21:51:22,877 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:51:22,878 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2022-07-22 21:51:22,885 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04bb879a8/4c1b074986884724ba3d46d08efb66b3/FLAG83b428312 [2022-07-22 21:51:23,288 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04bb879a8/4c1b074986884724ba3d46d08efb66b3 [2022-07-22 21:51:23,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:51:23,292 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:51:23,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:51:23,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:51:23,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:51:23,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:51:23" (1/1) ... [2022-07-22 21:51:23,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dcd9018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:23, skipping insertion in model container [2022-07-22 21:51:23,297 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:51:23" (1/1) ... [2022-07-22 21:51:23,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:51:23,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:51:23,461 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-min-array-hom.wvr.c[2586,2599] [2022-07-22 21:51:23,467 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:51:23,474 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:51:23,490 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-min-array-hom.wvr.c[2586,2599] [2022-07-22 21:51:23,493 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:51:23,505 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:51:23,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:23 WrapperNode [2022-07-22 21:51:23,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:51:23,506 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:51:23,506 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:51:23,506 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:51:23,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:23" (1/1) ... [2022-07-22 21:51:23,522 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:23" (1/1) ... [2022-07-22 21:51:23,539 INFO L137 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 106 [2022-07-22 21:51:23,540 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:51:23,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:51:23,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:51:23,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:51:23,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:23" (1/1) ... [2022-07-22 21:51:23,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:23" (1/1) ... [2022-07-22 21:51:23,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:23" (1/1) ... [2022-07-22 21:51:23,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:23" (1/1) ... [2022-07-22 21:51:23,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:23" (1/1) ... [2022-07-22 21:51:23,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:23" (1/1) ... [2022-07-22 21:51:23,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:23" (1/1) ... [2022-07-22 21:51:23,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:51:23,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:51:23,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:51:23,584 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:51:23,585 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:23" (1/1) ... [2022-07-22 21:51:23,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:51:23,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:51:23,608 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 21:51:23,614 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 21:51:23,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:51:23,639 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:51:23,639 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:51:23,640 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:51:23,641 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:51:23,641 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-22 21:51:23,641 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-22 21:51:23,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:51:23,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:51:23,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:51:23,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:51:23,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:51:23,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 21:51:23,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:51:23,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:51:23,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:51:23,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:51:23,647 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 21:51:23,715 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:51:23,717 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:51:23,936 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:51:23,993 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:51:23,993 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-22 21:51:23,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:51:23 BoogieIcfgContainer [2022-07-22 21:51:23,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:51:23,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:51:23,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:51:24,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:51:24,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:51:23" (1/3) ... [2022-07-22 21:51:24,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7829783e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:51:24, skipping insertion in model container [2022-07-22 21:51:24,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:23" (2/3) ... [2022-07-22 21:51:24,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7829783e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:51:24, skipping insertion in model container [2022-07-22 21:51:24,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:51:23" (3/3) ... [2022-07-22 21:51:24,005 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2022-07-22 21:51:24,010 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:51:24,018 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:51:24,018 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:51:24,018 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:51:24,079 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-22 21:51:24,126 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 156 places, 159 transitions, 342 flow [2022-07-22 21:51:24,232 INFO L129 PetriNetUnfolder]: 13/156 cut-off events. [2022-07-22 21:51:24,232 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:51:24,239 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 21:51:24,239 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 159 transitions, 342 flow [2022-07-22 21:51:24,250 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 145 transitions, 308 flow [2022-07-22 21:51:24,262 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:51:24,268 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@6a5da0ec, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@589a6110 [2022-07-22 21:51:24,268 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-22 21:51:24,297 INFO L129 PetriNetUnfolder]: 13/144 cut-off events. [2022-07-22 21:51:24,297 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:51:24,298 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:51:24,298 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 21:51:24,299 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 21:51:24,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:51:24,303 INFO L85 PathProgramCache]: Analyzing trace with hash 379312160, now seen corresponding path program 1 times [2022-07-22 21:51:24,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:51:24,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914918324] [2022-07-22 21:51:24,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:24,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:51:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:24,526 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 21:51:24,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:51:24,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914918324] [2022-07-22 21:51:24,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914918324] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:51:24,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:51:24,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:51:24,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126107096] [2022-07-22 21:51:24,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:51:24,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:51:24,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:51:24,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:51:24,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:51:24,568 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 159 [2022-07-22 21:51:24,570 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 21:51:24,570 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:51:24,571 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 159 [2022-07-22 21:51:24,572 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:51:24,647 INFO L129 PetriNetUnfolder]: 42/270 cut-off events. [2022-07-22 21:51:24,648 INFO L130 PetriNetUnfolder]: For 50/51 co-relation queries the response was YES. [2022-07-22 21:51:24,650 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 21:51:24,652 INFO L132 encePairwiseOnDemand]: 151/159 looper letters, 9 selfloop transitions, 0 changer transitions 4/137 dead transitions. [2022-07-22 21:51:24,652 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 137 transitions, 310 flow [2022-07-22 21:51:24,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:51:24,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:51:24,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 299 transitions. [2022-07-22 21:51:24,675 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.940251572327044 [2022-07-22 21:51:24,676 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 299 transitions. [2022-07-22 21:51:24,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 299 transitions. [2022-07-22 21:51:24,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:51:24,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 299 transitions. [2022-07-22 21:51:24,686 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 21:51:24,691 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 21:51:24,691 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 21:51:24,693 INFO L186 Difference]: Start difference. First operand has 142 places, 145 transitions, 308 flow. Second operand 2 states and 299 transitions. [2022-07-22 21:51:24,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 137 transitions, 310 flow [2022-07-22 21:51:24,696 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 21:51:24,700 INFO L242 Difference]: Finished difference. Result has 137 places, 133 transitions, 272 flow [2022-07-22 21:51:24,702 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 21:51:24,709 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, -5 predicate places. [2022-07-22 21:51:24,709 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 133 transitions, 272 flow [2022-07-22 21:51:24,710 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 21:51:24,710 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:51:24,710 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 21:51:24,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:51:24,711 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 21:51:24,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:51:24,712 INFO L85 PathProgramCache]: Analyzing trace with hash 191455911, now seen corresponding path program 1 times [2022-07-22 21:51:24,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:51:24,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946715672] [2022-07-22 21:51:24,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:24,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:51:24,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:25,112 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 21:51:25,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:51:25,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946715672] [2022-07-22 21:51:25,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946715672] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:51:25,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:51:25,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:51:25,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725421564] [2022-07-22 21:51:25,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:51:25,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:51:25,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:51:25,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:51:25,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:51:25,124 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 159 [2022-07-22 21:51:25,127 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 21:51:25,127 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:51:25,128 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 159 [2022-07-22 21:51:25,128 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:51:25,422 INFO L129 PetriNetUnfolder]: 296/684 cut-off events. [2022-07-22 21:51:25,423 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-22 21:51:25,427 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 21:51:25,434 INFO L132 encePairwiseOnDemand]: 149/159 looper letters, 44 selfloop transitions, 6 changer transitions 4/141 dead transitions. [2022-07-22 21:51:25,434 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 141 transitions, 396 flow [2022-07-22 21:51:25,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:51:25,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:51:25,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 855 transitions. [2022-07-22 21:51:25,443 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6721698113207547 [2022-07-22 21:51:25,443 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 855 transitions. [2022-07-22 21:51:25,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 855 transitions. [2022-07-22 21:51:25,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:51:25,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 855 transitions. [2022-07-22 21:51:25,448 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 21:51:25,452 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 21:51:25,453 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 21:51:25,453 INFO L186 Difference]: Start difference. First operand has 137 places, 133 transitions, 272 flow. Second operand 8 states and 855 transitions. [2022-07-22 21:51:25,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 141 transitions, 396 flow [2022-07-22 21:51:25,456 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 21:51:25,461 INFO L242 Difference]: Finished difference. Result has 144 places, 134 transitions, 300 flow [2022-07-22 21:51:25,461 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 21:51:25,462 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 2 predicate places. [2022-07-22 21:51:25,462 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 134 transitions, 300 flow [2022-07-22 21:51:25,463 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 21:51:25,463 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:51:25,463 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 21:51:25,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:51:25,464 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 21:51:25,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:51:25,465 INFO L85 PathProgramCache]: Analyzing trace with hash -553736524, now seen corresponding path program 1 times [2022-07-22 21:51:25,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:51:25,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876584826] [2022-07-22 21:51:25,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:25,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:51:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:25,644 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 21:51:25,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:51:25,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876584826] [2022-07-22 21:51:25,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876584826] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:51:25,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588276113] [2022-07-22 21:51:25,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:25,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:51:25,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:51:25,652 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 21:51:25,653 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 21:51:25,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:25,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:51:25,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:51:25,952 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 21:51:25,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:51:26,127 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 21:51:26,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588276113] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:51:26,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:51:26,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-22 21:51:26,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869218950] [2022-07-22 21:51:26,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:51:26,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:51:26,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:51:26,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:51:26,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:51:26,132 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 159 [2022-07-22 21:51:26,134 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 21:51:26,134 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:51:26,134 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 159 [2022-07-22 21:51:26,134 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:51:26,295 INFO L129 PetriNetUnfolder]: 183/623 cut-off events. [2022-07-22 21:51:26,295 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-22 21:51:26,297 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 21:51:26,301 INFO L132 encePairwiseOnDemand]: 151/159 looper letters, 33 selfloop transitions, 7 changer transitions 0/142 dead transitions. [2022-07-22 21:51:26,301 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 142 transitions, 398 flow [2022-07-22 21:51:26,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:51:26,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:51:26,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 873 transitions. [2022-07-22 21:51:26,304 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.784366576819407 [2022-07-22 21:51:26,304 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 873 transitions. [2022-07-22 21:51:26,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 873 transitions. [2022-07-22 21:51:26,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:51:26,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 873 transitions. [2022-07-22 21:51:26,307 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 21:51:26,310 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 21:51:26,311 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 21:51:26,311 INFO L186 Difference]: Start difference. First operand has 144 places, 134 transitions, 300 flow. Second operand 7 states and 873 transitions. [2022-07-22 21:51:26,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 142 transitions, 398 flow [2022-07-22 21:51:26,313 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 21:51:26,317 INFO L242 Difference]: Finished difference. Result has 144 places, 136 transitions, 315 flow [2022-07-22 21:51:26,317 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 21:51:26,318 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 2 predicate places. [2022-07-22 21:51:26,318 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 136 transitions, 315 flow [2022-07-22 21:51:26,319 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 21:51:26,319 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:51:26,320 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 21:51:26,348 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 21:51:26,544 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 21:51:26,544 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 21:51:26,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:51:26,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1840372881, now seen corresponding path program 1 times [2022-07-22 21:51:26,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:51:26,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279664938] [2022-07-22 21:51:26,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:26,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:51:26,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:26,669 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 21:51:26,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:51:26,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279664938] [2022-07-22 21:51:26,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279664938] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:51:26,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689978573] [2022-07-22 21:51:26,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:26,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:51:26,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:51:26,672 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 21:51:26,701 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 21:51:26,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:26,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:51:26,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:51:26,943 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 21:51:26,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:51:27,136 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 21:51:27,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689978573] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:51:27,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:51:27,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 18 [2022-07-22 21:51:27,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209402337] [2022-07-22 21:51:27,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:51:27,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 21:51:27,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:51:27,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 21:51:27,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:51:27,143 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 159 [2022-07-22 21:51:27,145 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 21:51:27,145 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:51:27,145 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 159 [2022-07-22 21:51:27,145 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:51:27,542 INFO L129 PetriNetUnfolder]: 850/1566 cut-off events. [2022-07-22 21:51:27,543 INFO L130 PetriNetUnfolder]: For 646/901 co-relation queries the response was YES. [2022-07-22 21:51:27,547 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 21:51:27,557 INFO L132 encePairwiseOnDemand]: 148/159 looper letters, 84 selfloop transitions, 17 changer transitions 0/196 dead transitions. [2022-07-22 21:51:27,557 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 196 transitions, 688 flow [2022-07-22 21:51:27,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:51:27,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:51:27,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1327 transitions. [2022-07-22 21:51:27,561 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7587192681532304 [2022-07-22 21:51:27,561 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1327 transitions. [2022-07-22 21:51:27,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1327 transitions. [2022-07-22 21:51:27,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:51:27,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1327 transitions. [2022-07-22 21:51:27,565 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 21:51:27,569 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 21:51:27,570 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 21:51:27,570 INFO L186 Difference]: Start difference. First operand has 144 places, 136 transitions, 315 flow. Second operand 11 states and 1327 transitions. [2022-07-22 21:51:27,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 196 transitions, 688 flow [2022-07-22 21:51:27,573 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 21:51:27,577 INFO L242 Difference]: Finished difference. Result has 154 places, 147 transitions, 395 flow [2022-07-22 21:51:27,577 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 21:51:27,578 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 12 predicate places. [2022-07-22 21:51:27,579 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 147 transitions, 395 flow [2022-07-22 21:51:27,579 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 21:51:27,579 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:51:27,580 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 21:51:27,606 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 21:51:27,803 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 21:51:27,803 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 21:51:27,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:51:27,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1817451035, now seen corresponding path program 2 times [2022-07-22 21:51:27,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:51:27,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982297216] [2022-07-22 21:51:27,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:27,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:51:27,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:27,960 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 21:51:27,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:51:27,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982297216] [2022-07-22 21:51:27,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982297216] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:51:27,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404450893] [2022-07-22 21:51:27,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:51:27,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:51:27,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:51:27,963 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 21:51:27,965 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 21:51:28,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 21:51:28,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:51:28,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 21:51:28,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:51:28,262 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 21:51:28,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:51:28,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404450893] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:51:28,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:51:28,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-07-22 21:51:28,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443190977] [2022-07-22 21:51:28,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:51:28,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:51:28,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:51:28,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:51:28,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:51:28,266 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 159 [2022-07-22 21:51:28,267 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 21:51:28,267 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:51:28,267 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 159 [2022-07-22 21:51:28,268 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:51:28,580 INFO L129 PetriNetUnfolder]: 608/1360 cut-off events. [2022-07-22 21:51:28,580 INFO L130 PetriNetUnfolder]: For 932/1135 co-relation queries the response was YES. [2022-07-22 21:51:28,585 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 21:51:28,593 INFO L132 encePairwiseOnDemand]: 150/159 looper letters, 48 selfloop transitions, 13 changer transitions 0/160 dead transitions. [2022-07-22 21:51:28,593 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 160 transitions, 570 flow [2022-07-22 21:51:28,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:51:28,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:51:28,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 905 transitions. [2022-07-22 21:51:28,596 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7114779874213837 [2022-07-22 21:51:28,596 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 905 transitions. [2022-07-22 21:51:28,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 905 transitions. [2022-07-22 21:51:28,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:51:28,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 905 transitions. [2022-07-22 21:51:28,599 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 21:51:28,601 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 21:51:28,601 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 21:51:28,602 INFO L186 Difference]: Start difference. First operand has 154 places, 147 transitions, 395 flow. Second operand 8 states and 905 transitions. [2022-07-22 21:51:28,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 160 transitions, 570 flow [2022-07-22 21:51:28,608 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 21:51:28,610 INFO L242 Difference]: Finished difference. Result has 159 places, 150 transitions, 456 flow [2022-07-22 21:51:28,611 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 21:51:28,613 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 17 predicate places. [2022-07-22 21:51:28,613 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 150 transitions, 456 flow [2022-07-22 21:51:28,613 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 21:51:28,614 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:51:28,614 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 21:51:28,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:51:28,827 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 21:51:28,828 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 21:51:28,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:51:28,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1490878222, now seen corresponding path program 1 times [2022-07-22 21:51:28,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:51:28,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764771531] [2022-07-22 21:51:28,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:28,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:51:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:29,716 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 21:51:29,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:51:29,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764771531] [2022-07-22 21:51:29,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764771531] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:51:29,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253106889] [2022-07-22 21:51:29,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:29,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:51:29,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:51:29,720 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 21:51:29,748 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 21:51:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:29,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-22 21:51:29,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:51:30,983 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-07-22 21:51:30,985 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 36 [2022-07-22 21:51:31,225 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 21:51:31,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:51:31,536 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:51:31,536 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 87 treesize of output 55 [2022-07-22 21:51:32,540 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 21:51:32,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253106889] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:51:32,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:51:32,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 21, 21] total 58 [2022-07-22 21:51:32,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325951388] [2022-07-22 21:51:32,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:51:32,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-22 21:51:32,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:51:32,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-22 21:51:32,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=584, Invalid=2722, Unknown=0, NotChecked=0, Total=3306 [2022-07-22 21:51:32,549 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 159 [2022-07-22 21:51:32,553 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 150 transitions, 456 flow. Second operand has 58 states, 58 states have (on average 71.39655172413794) internal successors, (4141), 58 states have internal predecessors, (4141), 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 21:51:32,553 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:51:32,553 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 159 [2022-07-22 21:51:32,553 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:51:38,138 INFO L129 PetriNetUnfolder]: 8356/13792 cut-off events. [2022-07-22 21:51:38,138 INFO L130 PetriNetUnfolder]: For 14091/14450 co-relation queries the response was YES. [2022-07-22 21:51:38,203 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36671 conditions, 13792 events. 8356/13792 cut-off events. For 14091/14450 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 102262 event pairs, 982 based on Foata normal form. 275/13847 useless extension candidates. Maximal degree in co-relation 36657. Up to 3808 conditions per place. [2022-07-22 21:51:38,268 INFO L132 encePairwiseOnDemand]: 114/159 looper letters, 427 selfloop transitions, 136 changer transitions 21/642 dead transitions. [2022-07-22 21:51:38,269 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 642 transitions, 3741 flow [2022-07-22 21:51:38,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-22 21:51:38,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-07-22 21:51:38,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 4837 transitions. [2022-07-22 21:51:38,281 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.47533411949685533 [2022-07-22 21:51:38,282 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 4837 transitions. [2022-07-22 21:51:38,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 4837 transitions. [2022-07-22 21:51:38,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:51:38,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 4837 transitions. [2022-07-22 21:51:38,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 75.578125) internal successors, (4837), 64 states have internal predecessors, (4837), 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 21:51:38,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 159.0) internal successors, (10335), 65 states have internal predecessors, (10335), 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 21:51:38,311 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 159.0) internal successors, (10335), 65 states have internal predecessors, (10335), 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 21:51:38,311 INFO L186 Difference]: Start difference. First operand has 159 places, 150 transitions, 456 flow. Second operand 64 states and 4837 transitions. [2022-07-22 21:51:38,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 642 transitions, 3741 flow [2022-07-22 21:51:38,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 642 transitions, 3608 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-07-22 21:51:38,430 INFO L242 Difference]: Finished difference. Result has 266 places, 270 transitions, 1618 flow [2022-07-22 21:51:38,430 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=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=1618, PETRI_PLACES=266, PETRI_TRANSITIONS=270} [2022-07-22 21:51:38,432 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 124 predicate places. [2022-07-22 21:51:38,432 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 270 transitions, 1618 flow [2022-07-22 21:51:38,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 71.39655172413794) internal successors, (4141), 58 states have internal predecessors, (4141), 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 21:51:38,434 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:51:38,434 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 21:51:38,459 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 21:51:38,659 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 21:51:38,659 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 21:51:38,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:51:38,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1409400304, now seen corresponding path program 2 times [2022-07-22 21:51:38,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:51:38,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110830320] [2022-07-22 21:51:38,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:38,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:51:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:39,446 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 21:51:39,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:51:39,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110830320] [2022-07-22 21:51:39,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110830320] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:51:39,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646861987] [2022-07-22 21:51:39,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:51:39,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:51:39,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:51:39,449 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 21:51:39,457 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 21:51:39,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:51:39,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:51:39,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-22 21:51:39,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:51:39,661 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 21:51:39,931 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:51:39,931 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 21:51:40,082 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 21:51:40,379 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 21:51:40,505 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 21:51:40,632 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 21:51:41,170 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:51:41,171 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 21:51:41,703 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 21:51:41,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:51:43,609 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse5 (< c_~min3~0 c_~min2~0))) (and (forall ((v_ArrVal_193 (Array Int Int)) (~M~0 Int) (v_ArrVal_194 (Array Int Int))) (let ((.cse2 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_193) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_194) c_~A~0.base))) (let ((.cse0 (select .cse2 c_~A~0.offset)) (.cse1 (select .cse2 (+ c_~A~0.offset (* ~M~0 4))))) (or (= c_~min2~0 .cse0) (<= (+ ~M~0 1) 0) (< .cse1 c_~min2~0) (< 0 ~M~0) (not (< .cse0 c_~min1~0)) (not (< .cse1 c_~min3~0)))))) (or (forall ((v_ArrVal_193 (Array Int Int)) (~M~0 Int) (v_ArrVal_194 (Array Int Int))) (let ((.cse4 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_193) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_194) c_~A~0.base))) (let ((.cse3 (select .cse4 c_~A~0.offset))) (or (= c_~min2~0 .cse3) (<= (+ ~M~0 1) 0) (< 0 ~M~0) (not (< .cse3 c_~min1~0)) (< (select .cse4 (+ c_~A~0.offset (* ~M~0 4))) c_~min3~0))))) .cse5) (or (= c_~min2~0 c_~min1~0) (and (or (forall ((v_ArrVal_193 (Array Int Int)) (~M~0 Int) (v_ArrVal_194 (Array Int Int))) (let ((.cse6 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_193) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_194) c_~A~0.base))) (or (<= (+ ~M~0 1) 0) (< 0 ~M~0) (< (select .cse6 c_~A~0.offset) c_~min1~0) (< (select .cse6 (+ c_~A~0.offset (* ~M~0 4))) c_~min3~0)))) .cse5) (forall ((v_ArrVal_193 (Array Int Int)) (~M~0 Int) (v_ArrVal_194 (Array Int Int))) (let ((.cse8 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_193) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_194) c_~A~0.base))) (let ((.cse7 (select .cse8 (+ c_~A~0.offset (* ~M~0 4))))) (or (<= (+ ~M~0 1) 0) (< .cse7 c_~min2~0) (< 0 ~M~0) (< (select .cse8 c_~A~0.offset) c_~min1~0) (not (< .cse7 c_~min3~0)))))))))) is different from false [2022-07-22 21:51:45,856 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:51:45,857 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 70 [2022-07-22 21:51:45,875 INFO L356 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-07-22 21:51:45,876 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 3473 treesize of output 3317 [2022-07-22 21:51:45,931 INFO L356 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-07-22 21:51:45,932 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 3313 treesize of output 3093 [2022-07-22 21:51:45,983 INFO L356 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-07-22 21:51:45,983 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 3089 treesize of output 2981 [2022-07-22 21:51:46,032 INFO L356 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-07-22 21:51:46,033 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 2977 treesize of output 2533 [2022-07-22 21:51:47,472 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:51:47,473 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 21:51:47,488 INFO L356 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-07-22 21:51:47,489 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 2187 treesize of output 2095 [2022-07-22 21:51:47,524 INFO L356 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-07-22 21:51:47,525 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 2091 treesize of output 1839 [2022-07-22 21:51:47,562 INFO L356 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-07-22 21:51:47,563 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 1835 treesize of output 1711 [2022-07-22 21:51:47,599 INFO L356 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-07-22 21:51:47,599 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 1707 treesize of output 1647 [2022-07-22 21:52:03,516 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-22 21:52:03,517 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 21:52:03,528 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-22 21:52:03,529 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 1 [2022-07-22 21:52:03,757 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 21:52:03,813 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 21:52:03,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646861987] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:52:03,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:52:03,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 26] total 71 [2022-07-22 21:52:03,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850254117] [2022-07-22 21:52:03,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:52:03,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-22 21:52:03,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:52:03,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-22 21:52:03,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=895, Invalid=3874, Unknown=65, NotChecked=136, Total=4970 [2022-07-22 21:52:03,820 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 159 [2022-07-22 21:52:03,823 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 270 transitions, 1618 flow. Second operand has 71 states, 71 states have (on average 55.985915492957744) internal successors, (3975), 71 states have internal predecessors, (3975), 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 21:52:03,823 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:52:03,823 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 159 [2022-07-22 21:52:03,823 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:52:13,173 INFO L129 PetriNetUnfolder]: 16054/25558 cut-off events. [2022-07-22 21:52:13,174 INFO L130 PetriNetUnfolder]: For 135128/135198 co-relation queries the response was YES. [2022-07-22 21:52:13,347 INFO L84 FinitePrefix]: Finished finitePrefix Result has 100236 conditions, 25558 events. 16054/25558 cut-off events. For 135128/135198 co-relation queries the response was YES. Maximal size of possible extension queue 1414. Compared 199106 event pairs, 2861 based on Foata normal form. 13/25404 useless extension candidates. Maximal degree in co-relation 100174. Up to 10317 conditions per place. [2022-07-22 21:52:13,583 INFO L132 encePairwiseOnDemand]: 117/159 looper letters, 436 selfloop transitions, 398 changer transitions 18/899 dead transitions. [2022-07-22 21:52:13,583 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 899 transitions, 7895 flow [2022-07-22 21:52:13,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-22 21:52:13,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-07-22 21:52:13,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3877 transitions. [2022-07-22 21:52:13,594 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.3809944968553459 [2022-07-22 21:52:13,594 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3877 transitions. [2022-07-22 21:52:13,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3877 transitions. [2022-07-22 21:52:13,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:52:13,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3877 transitions. [2022-07-22 21:52:13,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 60.578125) internal successors, (3877), 64 states have internal predecessors, (3877), 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 21:52:13,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 159.0) internal successors, (10335), 65 states have internal predecessors, (10335), 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 21:52:13,633 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 159.0) internal successors, (10335), 65 states have internal predecessors, (10335), 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 21:52:13,633 INFO L186 Difference]: Start difference. First operand has 266 places, 270 transitions, 1618 flow. Second operand 64 states and 3877 transitions. [2022-07-22 21:52:13,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 899 transitions, 7895 flow [2022-07-22 21:52:14,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 899 transitions, 7698 flow, removed 52 selfloop flow, removed 27 redundant places. [2022-07-22 21:52:14,426 INFO L242 Difference]: Finished difference. Result has 322 places, 613 transitions, 6109 flow [2022-07-22 21:52:14,426 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=6109, PETRI_PLACES=322, PETRI_TRANSITIONS=613} [2022-07-22 21:52:14,427 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 180 predicate places. [2022-07-22 21:52:14,427 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 613 transitions, 6109 flow [2022-07-22 21:52:14,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 55.985915492957744) internal successors, (3975), 71 states have internal predecessors, (3975), 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 21:52:14,429 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:52:14,429 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 21:52:14,456 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 21:52:14,651 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 21:52:14,652 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 21:52:14,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:52:14,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1492708534, now seen corresponding path program 3 times [2022-07-22 21:52:14,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:52:14,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902060672] [2022-07-22 21:52:14,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:52:14,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:52:14,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:52:15,868 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 21:52:15,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:52:15,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902060672] [2022-07-22 21:52:15,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902060672] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:52:15,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193006753] [2022-07-22 21:52:15,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:52:15,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:52:15,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:52:15,870 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 21:52:15,871 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 21:52:15,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 21:52:15,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:52:15,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-22 21:52:15,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:52:16,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:52:16,742 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 21:52:16,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:52:16,992 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 21:52:17,324 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:52:17,324 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 72 treesize of output 48 [2022-07-22 21:52:17,771 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 21:52:17,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:52:18,997 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:52:18,998 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 277 treesize of output 277 [2022-07-22 21:52:19,006 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 206 treesize of output 182 [2022-07-22 21:52:19,026 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 182 treesize of output 170 [2022-07-22 21:52:19,032 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 170 treesize of output 164 [2022-07-22 21:52:19,038 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 164 treesize of output 152 [2022-07-22 21:52:20,248 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 21:52:20,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193006753] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:52:20,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:52:20,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 28, 28] total 78 [2022-07-22 21:52:20,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937803019] [2022-07-22 21:52:20,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:52:20,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-07-22 21:52:20,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:52:20,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-07-22 21:52:20,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1091, Invalid=4911, Unknown=4, NotChecked=0, Total=6006 [2022-07-22 21:52:20,254 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 159 [2022-07-22 21:52:20,258 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 613 transitions, 6109 flow. Second operand has 78 states, 78 states have (on average 63.65384615384615) internal successors, (4965), 78 states have internal predecessors, (4965), 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 21:52:20,258 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:52:20,258 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 159 [2022-07-22 21:52:20,258 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:52:40,403 INFO L129 PetriNetUnfolder]: 23305/41073 cut-off events. [2022-07-22 21:52:40,403 INFO L130 PetriNetUnfolder]: For 405222/406956 co-relation queries the response was YES. [2022-07-22 21:52:40,903 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202050 conditions, 41073 events. 23305/41073 cut-off events. For 405222/406956 co-relation queries the response was YES. Maximal size of possible extension queue 2336. Compared 382994 event pairs, 831 based on Foata normal form. 1379/42076 useless extension candidates. Maximal degree in co-relation 201970. Up to 9138 conditions per place. [2022-07-22 21:52:41,125 INFO L132 encePairwiseOnDemand]: 114/159 looper letters, 822 selfloop transitions, 1591 changer transitions 34/2538 dead transitions. [2022-07-22 21:52:41,125 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 2538 transitions, 31527 flow [2022-07-22 21:52:41,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-07-22 21:52:41,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2022-07-22 21:52:41,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 9137 transitions. [2022-07-22 21:52:41,140 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4256696948520848 [2022-07-22 21:52:41,140 INFO L72 ComplementDD]: Start complementDD. Operand 135 states and 9137 transitions. [2022-07-22 21:52:41,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 135 states and 9137 transitions. [2022-07-22 21:52:41,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:52:41,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 135 states and 9137 transitions. [2022-07-22 21:52:41,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 136 states, 135 states have (on average 67.68148148148148) internal successors, (9137), 135 states have internal predecessors, (9137), 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 21:52:41,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 136 states, 136 states have (on average 159.0) internal successors, (21624), 136 states have internal predecessors, (21624), 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 21:52:41,185 INFO L81 ComplementDD]: Finished complementDD. Result has 136 states, 136 states have (on average 159.0) internal successors, (21624), 136 states have internal predecessors, (21624), 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 21:52:41,185 INFO L186 Difference]: Start difference. First operand has 322 places, 613 transitions, 6109 flow. Second operand 135 states and 9137 transitions. [2022-07-22 21:52:41,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 2538 transitions, 31527 flow [2022-07-22 21:52:44,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 2538 transitions, 29400 flow, removed 1030 selfloop flow, removed 25 redundant places. [2022-07-22 21:52:44,920 INFO L242 Difference]: Finished difference. Result has 499 places, 1881 transitions, 25796 flow [2022-07-22 21:52:44,921 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=5662, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=387, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=135, PETRI_FLOW=25796, PETRI_PLACES=499, PETRI_TRANSITIONS=1881} [2022-07-22 21:52:44,921 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 357 predicate places. [2022-07-22 21:52:44,922 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 1881 transitions, 25796 flow [2022-07-22 21:52:44,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 63.65384615384615) internal successors, (4965), 78 states have internal predecessors, (4965), 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 21:52:44,923 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:52:44,923 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 21:52:44,947 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 21:52:45,139 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 21:52:45,140 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 21:52:45,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:52:45,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1217097074, now seen corresponding path program 1 times [2022-07-22 21:52:45,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:52:45,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317602352] [2022-07-22 21:52:45,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:52:45,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:52:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:52:46,040 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 21:52:46,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:52:46,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317602352] [2022-07-22 21:52:46,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317602352] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:52:46,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215755814] [2022-07-22 21:52:46,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:52:46,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:52:46,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:52:46,042 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 21:52:46,043 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 21:52:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:52:46,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-22 21:52:46,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:52:46,201 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 21:52:46,236 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-22 21:52:46,237 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 21:52:46,544 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:52:46,544 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 21:52:47,482 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 21:52:47,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:52:47,688 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 21:52:48,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 21:52:48,069 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:52:48,070 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 21:52:48,245 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 21:52:48,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:52:48,588 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_264 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_264) c_~A~0.base) (+ c_~A~0.offset (* 4 c_~M~0))))) (or (= c_~min1~0 .cse0) (not (< .cse0 c_~min3~0)) (not (< .cse0 c_~min2~0))))) (or (forall ((v_ArrVal_264 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_264) c_~A~0.base) (+ c_~A~0.offset (* 4 c_~M~0))) c_~min3~0)) (= c_~min1~0 c_~min3~0) (not (< c_~min3~0 c_~min2~0)))) is different from false [2022-07-22 21:52:48,668 WARN L833 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_263 (Array Int Int)) (v_ArrVal_264 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_263) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_264) c_~A~0.base) (+ c_~A~0.offset (* 4 c_~M~0))) c_~min3~0)) (= c_~min1~0 c_~min3~0) (not (< c_~min3~0 c_~min2~0))) (forall ((v_ArrVal_263 (Array Int Int)) (v_ArrVal_264 (Array Int Int))) (let ((.cse0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_263) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_264) c_~A~0.base) (+ c_~A~0.offset (* 4 c_~M~0))))) (or (= c_~min1~0 .cse0) (not (< .cse0 c_~min2~0)) (not (< .cse0 c_~min3~0)))))) is different from false [2022-07-22 21:52:48,754 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:52:48,755 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 655 treesize of output 583 [2022-07-22 21:52:48,805 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 544 treesize of output 472 [2022-07-22 21:52:48,817 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 472 treesize of output 460 [2022-07-22 21:52:48,824 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 460 treesize of output 436 [2022-07-22 21:52:48,831 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 436 treesize of output 400 [2022-07-22 21:52:51,549 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 21:52:51,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215755814] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:52:51,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:52:51,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 85 [2022-07-22 21:52:51,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015425283] [2022-07-22 21:52:51,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:52:51,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-07-22 21:52:51,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:52:51,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-07-22 21:52:51,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=813, Invalid=5999, Unknown=2, NotChecked=326, Total=7140 [2022-07-22 21:52:51,560 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 159 [2022-07-22 21:52:51,584 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 1881 transitions, 25796 flow. Second operand has 85 states, 85 states have (on average 58.576470588235296) internal successors, (4979), 85 states have internal predecessors, (4979), 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 21:52:51,584 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:52:51,585 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 159 [2022-07-22 21:52:51,585 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:53:24,039 INFO L129 PetriNetUnfolder]: 37372/64222 cut-off events. [2022-07-22 21:53:24,039 INFO L130 PetriNetUnfolder]: For 1700479/1701314 co-relation queries the response was YES. [2022-07-22 21:53:26,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 433909 conditions, 64222 events. 37372/64222 cut-off events. For 1700479/1701314 co-relation queries the response was YES. Maximal size of possible extension queue 3500. Compared 620286 event pairs, 4183 based on Foata normal form. 554/63954 useless extension candidates. Maximal degree in co-relation 433761. Up to 28644 conditions per place. [2022-07-22 21:53:26,916 INFO L132 encePairwiseOnDemand]: 111/159 looper letters, 1938 selfloop transitions, 924 changer transitions 35/2962 dead transitions. [2022-07-22 21:53:26,916 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 2962 transitions, 45191 flow [2022-07-22 21:53:26,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-07-22 21:53:26,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2022-07-22 21:53:26,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 4915 transitions. [2022-07-22 21:53:26,924 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.40145389201992976 [2022-07-22 21:53:26,924 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 4915 transitions. [2022-07-22 21:53:26,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 4915 transitions. [2022-07-22 21:53:26,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:53:26,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 4915 transitions. [2022-07-22 21:53:26,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 63.83116883116883) internal successors, (4915), 77 states have internal predecessors, (4915), 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 21:53:26,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 159.0) internal successors, (12402), 78 states have internal predecessors, (12402), 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 21:53:26,946 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 159.0) internal successors, (12402), 78 states have internal predecessors, (12402), 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 21:53:26,947 INFO L186 Difference]: Start difference. First operand has 499 places, 1881 transitions, 25796 flow. Second operand 77 states and 4915 transitions. [2022-07-22 21:53:26,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 2962 transitions, 45191 flow [2022-07-22 21:53:59,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 2962 transitions, 42792 flow, removed 1141 selfloop flow, removed 50 redundant places. [2022-07-22 21:53:59,098 INFO L242 Difference]: Finished difference. Result has 539 places, 2270 transitions, 33788 flow [2022-07-22 21:53:59,100 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=24528, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1881, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=571, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1091, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=33788, PETRI_PLACES=539, PETRI_TRANSITIONS=2270} [2022-07-22 21:53:59,100 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 397 predicate places. [2022-07-22 21:53:59,101 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 2270 transitions, 33788 flow [2022-07-22 21:53:59,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 58.576470588235296) internal successors, (4979), 85 states have internal predecessors, (4979), 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 21:53:59,102 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:53:59,103 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 21:53:59,119 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 21:53:59,303 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 21:53:59,303 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 21:53:59,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:53:59,304 INFO L85 PathProgramCache]: Analyzing trace with hash 86549124, now seen corresponding path program 4 times [2022-07-22 21:53:59,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:53:59,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223152920] [2022-07-22 21:53:59,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:59,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:53:59,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:59,930 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 21:53:59,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:53:59,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223152920] [2022-07-22 21:53:59,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223152920] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:53:59,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233717307] [2022-07-22 21:53:59,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:53:59,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:53:59,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:53:59,940 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 21:53:59,941 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 21:54:00,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:54:00,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:54:00,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-22 21:54:00,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:54:01,291 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:54:01,292 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 43 [2022-07-22 21:54:01,672 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 21:54:01,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:54:01,971 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:54:01,971 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 87 treesize of output 55 [2022-07-22 21:54:02,999 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 21:54:03,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233717307] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:54:03,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:54:03,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 24] total 68 [2022-07-22 21:54:03,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162199217] [2022-07-22 21:54:03,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:54:03,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-22 21:54:03,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:03,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-22 21:54:03,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=958, Invalid=3598, Unknown=0, NotChecked=0, Total=4556 [2022-07-22 21:54:03,040 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 159 [2022-07-22 21:54:03,043 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 2270 transitions, 33788 flow. Second operand has 68 states, 68 states have (on average 67.94117647058823) internal successors, (4620), 68 states have internal predecessors, (4620), 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 21:54:03,043 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:03,043 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 159 [2022-07-22 21:54:03,043 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand