./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 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-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-?-3598765 [2022-07-21 09:09:28,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:09:28,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:09:28,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:09:28,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:09:28,237 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:09:28,241 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:09:28,243 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:09:28,244 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:09:28,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:09:28,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:09:28,251 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:09:28,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:09:28,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:09:28,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:09:28,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:09:28,259 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:09:28,260 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:09:28,261 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:09:28,266 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:09:28,267 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:09:28,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:09:28,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:09:28,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:09:28,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:09:28,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:09:28,282 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:09:28,283 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:09:28,283 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:09:28,284 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:09:28,284 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:09:28,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:09:28,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:09:28,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:09:28,287 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:09:28,288 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:09:28,288 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:09:28,289 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:09:28,289 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:09:28,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:09:28,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:09:28,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:09:28,297 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:09:28,324 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:09:28,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:09:28,325 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:09:28,325 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:09:28,326 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:09:28,326 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:09:28,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:09:28,327 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:09:28,327 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:09:28,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:09:28,328 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:09:28,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:09:28,328 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:09:28,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:09:28,328 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:09:28,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:09:28,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:09:28,329 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:09:28,329 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:09:28,329 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:09:28,329 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:09:28,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:09:28,330 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:09:28,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:09:28,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:09:28,330 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:09:28,330 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:09:28,330 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:09:28,331 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:09:28,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:09:28,331 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:09:28,331 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:09:28,331 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:09:28,331 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 [2022-07-21 09:09:28,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:09:28,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:09:28,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:09:28,622 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:09:28,623 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:09:28,624 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2022-07-21 09:09:28,666 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48a791994/d3bcfd2be6a3454aa23e1903cb6f4d42/FLAG2dddca25c [2022-07-21 09:09:29,126 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:09:29,127 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2022-07-21 09:09:29,132 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48a791994/d3bcfd2be6a3454aa23e1903cb6f4d42/FLAG2dddca25c [2022-07-21 09:09:29,142 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48a791994/d3bcfd2be6a3454aa23e1903cb6f4d42 [2022-07-21 09:09:29,144 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:09:29,145 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:09:29,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:09:29,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:09:29,148 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:09:29,148 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:09:29" (1/1) ... [2022-07-21 09:09:29,149 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7226fd78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:09:29, skipping insertion in model container [2022-07-21 09:09:29,149 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:09:29" (1/1) ... [2022-07-21 09:09:29,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:09:29,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:09:29,323 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] [2022-07-21 09:09:29,335 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:09:29,340 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:09:29,367 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] [2022-07-21 09:09:29,369 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:09:29,379 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:09:29,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:09:29 WrapperNode [2022-07-21 09:09:29,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:09:29,382 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:09:29,382 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:09:29,382 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:09:29,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:09:29" (1/1) ... [2022-07-21 09:09:29,398 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:09:29" (1/1) ... [2022-07-21 09:09:29,420 INFO L137 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 106 [2022-07-21 09:09:29,421 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:09:29,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:09:29,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:09:29,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:09:29,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:09:29" (1/1) ... [2022-07-21 09:09:29,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:09:29" (1/1) ... [2022-07-21 09:09:29,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:09:29" (1/1) ... [2022-07-21 09:09:29,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:09:29" (1/1) ... [2022-07-21 09:09:29,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:09:29" (1/1) ... [2022-07-21 09:09:29,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:09:29" (1/1) ... [2022-07-21 09:09:29,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:09:29" (1/1) ... [2022-07-21 09:09:29,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:09:29,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:09:29,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:09:29,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:09:29,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:09:29" (1/1) ... [2022-07-21 09:09:29,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:09:29,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:09:29,486 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 09:09:29,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 09:09:29,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:09:29,512 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:09:29,512 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:09:29,512 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:09:29,513 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:09:29,513 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-21 09:09:29,513 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-21 09:09:29,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:09:29,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:09:29,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:09:29,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 09:09:29,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 09:09:29,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 09:09:29,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:09:29,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:09:29,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:09:29,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:09:29,515 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:09:29,571 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:09:29,572 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:09:29,744 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:09:29,795 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:09:29,796 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-21 09:09:29,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:09:29 BoogieIcfgContainer [2022-07-21 09:09:29,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:09:29,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:09:29,798 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:09:29,818 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:09:29,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:09:29" (1/3) ... [2022-07-21 09:09:29,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c2a9ca6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:09:29, skipping insertion in model container [2022-07-21 09:09:29,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:09:29" (2/3) ... [2022-07-21 09:09:29,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c2a9ca6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:09:29, skipping insertion in model container [2022-07-21 09:09:29,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:09:29" (3/3) ... [2022-07-21 09:09:29,821 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2022-07-21 09:09:29,824 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:09:29,830 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:09:29,830 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:09:29,830 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:09:29,912 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-21 09:09:29,952 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 156 places, 159 transitions, 342 flow [2022-07-21 09:09:30,025 INFO L129 PetriNetUnfolder]: 13/156 cut-off events. [2022-07-21 09:09:30,025 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 09:09:30,028 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. [2022-07-21 09:09:30,029 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 159 transitions, 342 flow [2022-07-21 09:09:30,036 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 145 transitions, 308 flow [2022-07-21 09:09:30,050 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:09:30,056 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@6e576cd8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7831d266 [2022-07-21 09:09:30,056 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-21 09:09:30,088 INFO L129 PetriNetUnfolder]: 13/144 cut-off events. [2022-07-21 09:09:30,095 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 09:09:30,095 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:09:30,096 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] [2022-07-21 09:09:30,096 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:09:30,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:09:30,101 INFO L85 PathProgramCache]: Analyzing trace with hash 379312160, now seen corresponding path program 1 times [2022-07-21 09:09:30,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:09:30,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683560701] [2022-07-21 09:09:30,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:09:30,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:09:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:09:30,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:09:30,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:09:30,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683560701] [2022-07-21 09:09:30,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683560701] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:09:30,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:09:30,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:09:30,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072914845] [2022-07-21 09:09:30,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:09:30,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:09:30,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:09:30,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:09:30,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:09:30,348 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 159 [2022-07-21 09:09:30,350 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) [2022-07-21 09:09:30,350 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:09:30,350 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 159 [2022-07-21 09:09:30,351 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:09:30,438 INFO L129 PetriNetUnfolder]: 42/270 cut-off events. [2022-07-21 09:09:30,438 INFO L130 PetriNetUnfolder]: For 50/51 co-relation queries the response was YES. [2022-07-21 09:09:30,442 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. [2022-07-21 09:09:30,444 INFO L132 encePairwiseOnDemand]: 151/159 looper letters, 9 selfloop transitions, 0 changer transitions 4/137 dead transitions. [2022-07-21 09:09:30,444 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 137 transitions, 310 flow [2022-07-21 09:09:30,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:09:30,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:09:30,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 299 transitions. [2022-07-21 09:09:30,457 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.940251572327044 [2022-07-21 09:09:30,457 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 299 transitions. [2022-07-21 09:09:30,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 299 transitions. [2022-07-21 09:09:30,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:09:30,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 299 transitions. [2022-07-21 09:09:30,465 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) [2022-07-21 09:09:30,471 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) [2022-07-21 09:09:30,471 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) [2022-07-21 09:09:30,472 INFO L186 Difference]: Start difference. First operand has 142 places, 145 transitions, 308 flow. Second operand 2 states and 299 transitions. [2022-07-21 09:09:30,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 137 transitions, 310 flow [2022-07-21 09:09:30,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 137 transitions, 298 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-21 09:09:30,479 INFO L242 Difference]: Finished difference. Result has 137 places, 133 transitions, 272 flow [2022-07-21 09:09:30,480 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} [2022-07-21 09:09:30,483 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, -5 predicate places. [2022-07-21 09:09:30,483 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 133 transitions, 272 flow [2022-07-21 09:09:30,484 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) [2022-07-21 09:09:30,484 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:09:30,484 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:09:30,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:09:30,485 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:09:30,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:09:30,486 INFO L85 PathProgramCache]: Analyzing trace with hash 191455911, now seen corresponding path program 1 times [2022-07-21 09:09:30,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:09:30,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456908396] [2022-07-21 09:09:30,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:09:30,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:09:30,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:09:30,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:09:30,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:09:30,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456908396] [2022-07-21 09:09:30,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456908396] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:09:30,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:09:30,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 09:09:30,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605292525] [2022-07-21 09:09:30,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:09:30,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:09:30,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:09:30,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:09:30,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:09:30,790 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 159 [2022-07-21 09:09:30,791 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) [2022-07-21 09:09:30,791 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:09:30,791 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 159 [2022-07-21 09:09:30,791 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:09:31,012 INFO L129 PetriNetUnfolder]: 296/684 cut-off events. [2022-07-21 09:09:31,013 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-21 09:09:31,014 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. [2022-07-21 09:09:31,017 INFO L132 encePairwiseOnDemand]: 149/159 looper letters, 44 selfloop transitions, 6 changer transitions 4/141 dead transitions. [2022-07-21 09:09:31,017 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 141 transitions, 396 flow [2022-07-21 09:09:31,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:09:31,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 09:09:31,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 855 transitions. [2022-07-21 09:09:31,019 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6721698113207547 [2022-07-21 09:09:31,019 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 855 transitions. [2022-07-21 09:09:31,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 855 transitions. [2022-07-21 09:09:31,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:09:31,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 855 transitions. [2022-07-21 09:09:31,021 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) [2022-07-21 09:09:31,024 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) [2022-07-21 09:09:31,024 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) [2022-07-21 09:09:31,025 INFO L186 Difference]: Start difference. First operand has 137 places, 133 transitions, 272 flow. Second operand 8 states and 855 transitions. [2022-07-21 09:09:31,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 141 transitions, 396 flow [2022-07-21 09:09:31,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 141 transitions, 396 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:09:31,028 INFO L242 Difference]: Finished difference. Result has 144 places, 134 transitions, 300 flow [2022-07-21 09:09:31,028 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} [2022-07-21 09:09:31,029 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 2 predicate places. [2022-07-21 09:09:31,029 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 134 transitions, 300 flow [2022-07-21 09:09:31,029 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) [2022-07-21 09:09:31,030 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:09:31,030 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] [2022-07-21 09:09:31,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:09:31,030 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:09:31,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:09:31,031 INFO L85 PathProgramCache]: Analyzing trace with hash -553736524, now seen corresponding path program 1 times [2022-07-21 09:09:31,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:09:31,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266962577] [2022-07-21 09:09:31,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:09:31,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:09:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:09:31,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:09:31,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:09:31,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266962577] [2022-07-21 09:09:31,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266962577] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:09:31,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363825987] [2022-07-21 09:09:31,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:09:31,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:09:31,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:09:31,183 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:09:31,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:09:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:09:31,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 09:09:31,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:09:31,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:09:31,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:09:31,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:09:31,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363825987] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:09:31,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:09:31,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-21 09:09:31,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156673712] [2022-07-21 09:09:31,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:09:31,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:09:31,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:09:31,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:09:31,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:09:31,578 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 159 [2022-07-21 09:09:31,579 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) [2022-07-21 09:09:31,580 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:09:31,580 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 159 [2022-07-21 09:09:31,580 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:09:31,715 INFO L129 PetriNetUnfolder]: 183/623 cut-off events. [2022-07-21 09:09:31,715 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-21 09:09:31,717 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. [2022-07-21 09:09:31,719 INFO L132 encePairwiseOnDemand]: 151/159 looper letters, 33 selfloop transitions, 7 changer transitions 0/142 dead transitions. [2022-07-21 09:09:31,719 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 142 transitions, 398 flow [2022-07-21 09:09:31,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:09:31,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:09:31,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 873 transitions. [2022-07-21 09:09:31,722 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.784366576819407 [2022-07-21 09:09:31,722 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 873 transitions. [2022-07-21 09:09:31,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 873 transitions. [2022-07-21 09:09:31,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:09:31,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 873 transitions. [2022-07-21 09:09:31,724 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) [2022-07-21 09:09:31,726 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) [2022-07-21 09:09:31,727 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) [2022-07-21 09:09:31,727 INFO L186 Difference]: Start difference. First operand has 144 places, 134 transitions, 300 flow. Second operand 7 states and 873 transitions. [2022-07-21 09:09:31,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 142 transitions, 398 flow [2022-07-21 09:09:31,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 142 transitions, 380 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-07-21 09:09:31,730 INFO L242 Difference]: Finished difference. Result has 144 places, 136 transitions, 315 flow [2022-07-21 09:09:31,731 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} [2022-07-21 09:09:31,731 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 2 predicate places. [2022-07-21 09:09:31,732 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 136 transitions, 315 flow [2022-07-21 09:09:31,732 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) [2022-07-21 09:09:31,732 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:09:31,732 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] [2022-07-21 09:09:31,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 09:09:31,952 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 [2022-07-21 09:09:31,953 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:09:31,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:09:31,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1840372881, now seen corresponding path program 1 times [2022-07-21 09:09:31,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:09:31,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894293420] [2022-07-21 09:09:31,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:09:31,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:09:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:09:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:09:32,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:09:32,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894293420] [2022-07-21 09:09:32,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894293420] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:09:32,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354499672] [2022-07-21 09:09:32,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:09:32,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:09:32,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:09:32,088 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:09:32,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:09:32,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:09:32,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:09:32,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:09:32,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:09:32,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:09:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:09:32,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354499672] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:09:32,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:09:32,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 18 [2022-07-21 09:09:32,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123746621] [2022-07-21 09:09:32,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:09:32,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:09:32,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:09:32,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:09:32,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-07-21 09:09:32,457 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 159 [2022-07-21 09:09:32,458 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) [2022-07-21 09:09:32,458 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:09:32,458 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 159 [2022-07-21 09:09:32,458 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:09:32,717 INFO L129 PetriNetUnfolder]: 850/1566 cut-off events. [2022-07-21 09:09:32,717 INFO L130 PetriNetUnfolder]: For 646/901 co-relation queries the response was YES. [2022-07-21 09:09:32,720 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. [2022-07-21 09:09:32,727 INFO L132 encePairwiseOnDemand]: 148/159 looper letters, 84 selfloop transitions, 17 changer transitions 0/196 dead transitions. [2022-07-21 09:09:32,727 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 196 transitions, 688 flow [2022-07-21 09:09:32,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:09:32,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-21 09:09:32,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1327 transitions. [2022-07-21 09:09:32,729 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7587192681532304 [2022-07-21 09:09:32,730 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1327 transitions. [2022-07-21 09:09:32,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1327 transitions. [2022-07-21 09:09:32,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:09:32,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1327 transitions. [2022-07-21 09:09:32,733 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) [2022-07-21 09:09:32,736 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) [2022-07-21 09:09:32,737 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) [2022-07-21 09:09:32,737 INFO L186 Difference]: Start difference. First operand has 144 places, 136 transitions, 315 flow. Second operand 11 states and 1327 transitions. [2022-07-21 09:09:32,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 196 transitions, 688 flow [2022-07-21 09:09:32,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 196 transitions, 675 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:09:32,741 INFO L242 Difference]: Finished difference. Result has 154 places, 147 transitions, 395 flow [2022-07-21 09:09:32,741 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} [2022-07-21 09:09:32,742 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 12 predicate places. [2022-07-21 09:09:32,742 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 147 transitions, 395 flow [2022-07-21 09:09:32,743 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) [2022-07-21 09:09:32,743 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:09:32,744 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] [2022-07-21 09:09:32,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-21 09:09:32,961 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 [2022-07-21 09:09:32,961 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:09:32,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:09:32,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1817451035, now seen corresponding path program 2 times [2022-07-21 09:09:32,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:09:32,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042816156] [2022-07-21 09:09:32,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:09:32,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:09:33,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:09:33,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:09:33,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:09:33,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042816156] [2022-07-21 09:09:33,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042816156] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:09:33,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547383986] [2022-07-21 09:09:33,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:09:33,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:09:33,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:09:33,112 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:09:33,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:09:33,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 09:09:33,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:09:33,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 09:09:33,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:09:33,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:09:33,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:09:33,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547383986] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:09:33,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:09:33,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-07-21 09:09:33,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291764488] [2022-07-21 09:09:33,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:09:33,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:09:33,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:09:33,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:09:33,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:09:33,390 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 159 [2022-07-21 09:09:33,391 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) [2022-07-21 09:09:33,391 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:09:33,392 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 159 [2022-07-21 09:09:33,392 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:09:33,619 INFO L129 PetriNetUnfolder]: 608/1360 cut-off events. [2022-07-21 09:09:33,619 INFO L130 PetriNetUnfolder]: For 932/1135 co-relation queries the response was YES. [2022-07-21 09:09:33,623 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. [2022-07-21 09:09:33,628 INFO L132 encePairwiseOnDemand]: 150/159 looper letters, 48 selfloop transitions, 13 changer transitions 0/160 dead transitions. [2022-07-21 09:09:33,628 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 160 transitions, 570 flow [2022-07-21 09:09:33,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:09:33,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 09:09:33,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 905 transitions. [2022-07-21 09:09:33,630 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7114779874213837 [2022-07-21 09:09:33,630 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 905 transitions. [2022-07-21 09:09:33,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 905 transitions. [2022-07-21 09:09:33,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:09:33,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 905 transitions. [2022-07-21 09:09:33,632 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) [2022-07-21 09:09:33,634 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) [2022-07-21 09:09:33,634 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) [2022-07-21 09:09:33,634 INFO L186 Difference]: Start difference. First operand has 154 places, 147 transitions, 395 flow. Second operand 8 states and 905 transitions. [2022-07-21 09:09:33,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 160 transitions, 570 flow [2022-07-21 09:09:33,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 160 transitions, 563 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:09:33,641 INFO L242 Difference]: Finished difference. Result has 159 places, 150 transitions, 456 flow [2022-07-21 09:09:33,641 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} [2022-07-21 09:09:33,643 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 17 predicate places. [2022-07-21 09:09:33,643 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 150 transitions, 456 flow [2022-07-21 09:09:33,643 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) [2022-07-21 09:09:33,644 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:09:33,644 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] [2022-07-21 09:09:33,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 09:09:33,859 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 [2022-07-21 09:09:33,859 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:09:33,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:09:33,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1490878222, now seen corresponding path program 1 times [2022-07-21 09:09:33,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:09:33,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220359191] [2022-07-21 09:09:33,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:09:33,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:09:33,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:09:34,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:09:34,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:09:34,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220359191] [2022-07-21 09:09:34,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220359191] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:09:34,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450512992] [2022-07-21 09:09:34,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:09:34,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:09:34,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:09:34,560 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:09:34,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:09:34,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:09:34,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-21 09:09:34,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:09:35,544 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-07-21 09:09:35,544 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 [2022-07-21 09:09:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:09:35,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:09:35,992 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:09:35,992 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 83 treesize of output 51 [2022-07-21 09:09:36,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:09:36,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450512992] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:09:36,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:09:36,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 21, 21] total 58 [2022-07-21 09:09:36,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494420793] [2022-07-21 09:09:36,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:09:36,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-21 09:09:36,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:09:36,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-21 09:09:36,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=584, Invalid=2722, Unknown=0, NotChecked=0, Total=3306 [2022-07-21 09:09:36,731 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 159 [2022-07-21 09:09:36,743 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) [2022-07-21 09:09:36,744 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:09:36,744 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 159 [2022-07-21 09:09:36,744 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:09:41,118 INFO L129 PetriNetUnfolder]: 8356/13792 cut-off events. [2022-07-21 09:09:41,118 INFO L130 PetriNetUnfolder]: For 14091/14450 co-relation queries the response was YES. [2022-07-21 09:09:41,155 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. [2022-07-21 09:09:41,213 INFO L132 encePairwiseOnDemand]: 114/159 looper letters, 427 selfloop transitions, 136 changer transitions 21/642 dead transitions. [2022-07-21 09:09:41,213 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 642 transitions, 3741 flow [2022-07-21 09:09:41,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-21 09:09:41,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-07-21 09:09:41,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 4837 transitions. [2022-07-21 09:09:41,221 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.47533411949685533 [2022-07-21 09:09:41,222 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 4837 transitions. [2022-07-21 09:09:41,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 4837 transitions. [2022-07-21 09:09:41,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:09:41,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 4837 transitions. [2022-07-21 09:09:41,230 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) [2022-07-21 09:09:41,240 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) [2022-07-21 09:09:41,242 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) [2022-07-21 09:09:41,243 INFO L186 Difference]: Start difference. First operand has 159 places, 150 transitions, 456 flow. Second operand 64 states and 4837 transitions. [2022-07-21 09:09:41,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 642 transitions, 3741 flow [2022-07-21 09:09:41,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 642 transitions, 3608 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-07-21 09:09:41,342 INFO L242 Difference]: Finished difference. Result has 266 places, 270 transitions, 1618 flow [2022-07-21 09:09:41,343 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} [2022-07-21 09:09:41,343 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 124 predicate places. [2022-07-21 09:09:41,344 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 270 transitions, 1618 flow [2022-07-21 09:09:41,345 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) [2022-07-21 09:09:41,345 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:09:41,345 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] [2022-07-21 09:09:41,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-21 09:09:41,560 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 [2022-07-21 09:09:41,560 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:09:41,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:09:41,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1409400304, now seen corresponding path program 2 times [2022-07-21 09:09:41,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:09:41,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327341275] [2022-07-21 09:09:41,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:09:41,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:09:41,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:09:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:09:42,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:09:42,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327341275] [2022-07-21 09:09:42,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327341275] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:09:42,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235286013] [2022-07-21 09:09:42,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:09:42,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:09:42,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:09:42,242 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:09:42,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:09:42,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:09:42,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:09:42,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-21 09:09:42,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:09:42,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:09:42,627 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:09:42,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 09:09:42,763 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 [2022-07-21 09:09:43,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:09:43,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:09:43,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:09:43,762 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:09:43,762 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 [2022-07-21 09:09:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:09:44,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:09:45,531 WARN L833 $PredicateComparison]: unable to prove that (forall ((~M~0 Int) (v_ArrVal_194 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_194) c_~A~0.base))) (or (< 0 ~M~0) (let ((.cse0 (select .cse2 (+ c_~A~0.offset (* c_thread1Thread1of1ForFork2_~i~0 4))))) (let ((.cse1 (< .cse0 c_~min1~0))) (and (or (= c_~min2~0 .cse0) (not .cse1)) (or (= c_~min2~0 c_~min1~0) .cse1)))) (let ((.cse4 (select .cse2 (+ c_~A~0.offset (* ~M~0 4))))) (let ((.cse3 (< .cse4 c_~min3~0))) (and (or .cse3 (< c_~min3~0 c_~min2~0)) (or (< .cse4 c_~min2~0) (not .cse3))))) (< (+ ~M~0 1) c_~N~0)))) is different from false [2022-07-21 09:09:48,474 WARN L833 $PredicateComparison]: unable to prove that (forall ((~M~0 Int) (v_ArrVal_194 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_194) c_~A~0.base))) (or (<= (+ ~M~0 1) c_thread1Thread1of1ForFork2_~i~0) (< 0 ~M~0) (let ((.cse0 (select .cse2 (+ c_~A~0.offset (* c_thread1Thread1of1ForFork2_~i~0 4))))) (let ((.cse1 (< .cse0 c_~min1~0))) (and (or (= c_~min2~0 .cse0) (not .cse1)) (or (= c_~min2~0 c_~min1~0) .cse1)))) (let ((.cse4 (select .cse2 (+ c_~A~0.offset (* ~M~0 4))))) (let ((.cse3 (< .cse4 c_~min3~0))) (and (or .cse3 (< c_~min3~0 c_~min2~0)) (or (< .cse4 c_~min2~0) (not .cse3)))))))) is different from false [2022-07-21 09:09:49,142 WARN L833 $PredicateComparison]: unable to prove that (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))) (or (<= (+ ~M~0 1) c_thread1Thread1of1ForFork2_~i~0) (let ((.cse0 (select .cse2 (+ c_~A~0.offset (* c_thread1Thread1of1ForFork2_~i~0 4))))) (let ((.cse1 (< .cse0 c_~min1~0))) (and (or (= c_~min2~0 .cse0) (not .cse1)) (or (= c_~min2~0 c_~min1~0) .cse1)))) (< 0 ~M~0) (let ((.cse4 (select .cse2 (+ c_~A~0.offset (* ~M~0 4))))) (let ((.cse3 (< .cse4 c_~min3~0))) (and (or .cse3 (< c_~min3~0 c_~min2~0)) (or (< .cse4 c_~min2~0) (not .cse3)))))))) is different from false [2022-07-21 09:10:09,288 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:10:09,289 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 195 treesize of output 135 [2022-07-21 09:10:09,316 INFO L356 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-07-21 09:10:09,317 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 6701 treesize of output 6417 [2022-07-21 09:10:09,382 INFO L356 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-07-21 09:10:09,382 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 6413 treesize of output 6033 [2022-07-21 09:10:09,445 INFO L356 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-07-21 09:10:09,446 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 6029 treesize of output 5841 [2022-07-21 09:10:09,506 INFO L356 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-07-21 09:10:09,506 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 5837 treesize of output 5073 [2022-07-21 09:10:31,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 09:10:31,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-21 09:10:31,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235286013] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:10:31,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:10:31,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 26] total 71 [2022-07-21 09:10:31,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351854697] [2022-07-21 09:10:31,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:10:31,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-21 09:10:31,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:31,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-21 09:10:31,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=907, Invalid=3538, Unknown=123, NotChecked=402, Total=4970 [2022-07-21 09:10:31,891 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 159 [2022-07-21 09:10:31,894 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) [2022-07-21 09:10:31,894 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:31,894 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 159 [2022-07-21 09:10:31,894 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:40,699 INFO L129 PetriNetUnfolder]: 16294/25887 cut-off events. [2022-07-21 09:10:40,700 INFO L130 PetriNetUnfolder]: For 136705/136775 co-relation queries the response was YES. [2022-07-21 09:10:41,002 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101541 conditions, 25887 events. 16294/25887 cut-off events. For 136705/136775 co-relation queries the response was YES. Maximal size of possible extension queue 1421. Compared 201292 event pairs, 2837 based on Foata normal form. 13/25734 useless extension candidates. Maximal degree in co-relation 101479. Up to 10317 conditions per place. [2022-07-21 09:10:41,147 INFO L132 encePairwiseOnDemand]: 115/159 looper letters, 434 selfloop transitions, 419 changer transitions 18/918 dead transitions. [2022-07-21 09:10:41,147 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 918 transitions, 8099 flow [2022-07-21 09:10:41,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-21 09:10:41,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-07-21 09:10:41,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3942 transitions. [2022-07-21 09:10:41,155 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.38142235123367196 [2022-07-21 09:10:41,156 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3942 transitions. [2022-07-21 09:10:41,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3942 transitions. [2022-07-21 09:10:41,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:10:41,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3942 transitions. [2022-07-21 09:10:41,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 60.646153846153844) internal successors, (3942), 65 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:41,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 159.0) internal successors, (10494), 66 states have internal predecessors, (10494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:41,187 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 159.0) internal successors, (10494), 66 states have internal predecessors, (10494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:41,187 INFO L186 Difference]: Start difference. First operand has 266 places, 270 transitions, 1618 flow. Second operand 65 states and 3942 transitions. [2022-07-21 09:10:41,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 918 transitions, 8099 flow [2022-07-21 09:10:42,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 918 transitions, 7899 flow, removed 52 selfloop flow, removed 27 redundant places. [2022-07-21 09:10:42,077 INFO L242 Difference]: Finished difference. Result has 323 places, 633 transitions, 6357 flow [2022-07-21 09:10:42,078 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=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=6357, PETRI_PLACES=323, PETRI_TRANSITIONS=633} [2022-07-21 09:10:42,079 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 181 predicate places. [2022-07-21 09:10:42,079 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 633 transitions, 6357 flow [2022-07-21 09:10:42,080 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) [2022-07-21 09:10:42,081 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:42,081 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] [2022-07-21 09:10:42,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-21 09:10:42,295 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 [2022-07-21 09:10:42,296 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:10:42,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:42,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1242628626, now seen corresponding path program 3 times [2022-07-21 09:10:42,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:42,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580510399] [2022-07-21 09:10:42,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:42,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:43,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:43,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:43,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580510399] [2022-07-21 09:10:43,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580510399] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:10:43,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797797520] [2022-07-21 09:10:43,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:10:43,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:10:43,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:10:43,105 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:10:43,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 09:10:43,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 09:10:43,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:10:43,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-21 09:10:43,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:10:44,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:10:44,024 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 [2022-07-21 09:10:44,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:10:44,283 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 [2022-07-21 09:10:44,592 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:10:44,593 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 [2022-07-21 09:10:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:10:45,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:10:46,438 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:10:46,439 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 255 treesize of output 223 [2022-07-21 09:10:46,445 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 124 treesize of output 100 [2022-07-21 09:10:46,449 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 79 treesize of output 67 [2022-07-21 09:10:46,593 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 9 treesize of output 3 [2022-07-21 09:10:46,605 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 41 treesize of output 29 [2022-07-21 09:10:47,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:10:47,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797797520] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:10:47,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:10:47,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 28, 28] total 73 [2022-07-21 09:10:47,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613453541] [2022-07-21 09:10:47,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:10:47,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-21 09:10:47,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:47,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-21 09:10:47,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=4300, Unknown=4, NotChecked=0, Total=5256 [2022-07-21 09:10:47,451 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 159 [2022-07-21 09:10:47,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 633 transitions, 6357 flow. Second operand has 73 states, 73 states have (on average 65.73972602739725) internal successors, (4799), 73 states have internal predecessors, (4799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:47,456 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:47,456 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 159 [2022-07-21 09:10:47,456 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:59,777 INFO L129 PetriNetUnfolder]: 18629/31921 cut-off events. [2022-07-21 09:10:59,777 INFO L130 PetriNetUnfolder]: For 345049/346393 co-relation queries the response was YES. [2022-07-21 09:11:00,461 INFO L84 FinitePrefix]: Finished finitePrefix Result has 167295 conditions, 31921 events. 18629/31921 cut-off events. For 345049/346393 co-relation queries the response was YES. Maximal size of possible extension queue 1851. Compared 279809 event pairs, 1201 based on Foata normal form. 910/32311 useless extension candidates. Maximal degree in co-relation 167215. Up to 9402 conditions per place. [2022-07-21 09:11:00,616 INFO L132 encePairwiseOnDemand]: 116/159 looper letters, 645 selfloop transitions, 948 changer transitions 21/1710 dead transitions. [2022-07-21 09:11:00,616 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 1710 transitions, 21416 flow [2022-07-21 09:11:00,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-21 09:11:00,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-21 09:11:00,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 6461 transitions. [2022-07-21 09:11:00,633 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.436937850814905 [2022-07-21 09:11:00,633 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 6461 transitions. [2022-07-21 09:11:00,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 6461 transitions. [2022-07-21 09:11:00,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:11:00,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 6461 transitions. [2022-07-21 09:11:00,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 69.47311827956989) internal successors, (6461), 93 states have internal predecessors, (6461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:00,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 159.0) internal successors, (14946), 94 states have internal predecessors, (14946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:00,659 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 159.0) internal successors, (14946), 94 states have internal predecessors, (14946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:00,659 INFO L186 Difference]: Start difference. First operand has 323 places, 633 transitions, 6357 flow. Second operand 93 states and 6461 transitions. [2022-07-21 09:11:00,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 1710 transitions, 21416 flow [2022-07-21 09:11:04,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 1710 transitions, 20079 flow, removed 635 selfloop flow, removed 25 redundant places. [2022-07-21 09:11:04,550 INFO L242 Difference]: Finished difference. Result has 431 places, 1289 transitions, 17520 flow [2022-07-21 09:11:04,551 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=5832, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=348, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=17520, PETRI_PLACES=431, PETRI_TRANSITIONS=1289} [2022-07-21 09:11:04,552 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 289 predicate places. [2022-07-21 09:11:04,552 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 1289 transitions, 17520 flow [2022-07-21 09:11:04,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 65.73972602739725) internal successors, (4799), 73 states have internal predecessors, (4799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:04,553 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:11:04,553 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:11:04,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 09:11:04,770 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 [2022-07-21 09:11:04,773 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:11:04,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:11:04,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1938704318, now seen corresponding path program 4 times [2022-07-21 09:11:04,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:11:04,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413272876] [2022-07-21 09:11:04,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:11:04,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:11:04,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:05,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:05,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:11:05,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413272876] [2022-07-21 09:11:05,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413272876] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:11:05,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037112939] [2022-07-21 09:11:05,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:11:05,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:05,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:11:05,616 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:11:05,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 09:11:05,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:11:05,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:11:05,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-21 09:11:05,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:11:06,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:11:06,868 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 [2022-07-21 09:11:07,089 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:11:07,090 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 [2022-07-21 09:11:07,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:07,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:11:08,148 WARN L833 $PredicateComparison]: unable to prove that (or (= c_~min2~0 c_~min1~0) (forall ((~M~0 Int) (v_ArrVal_261 (Array Int Int))) (or (not (< ~M~0 c_~N~0)) (let ((.cse1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_261) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))))) (let ((.cse0 (< .cse1 c_~min3~0))) (and (or (not .cse0) (< .cse1 c_~min2~0)) (or .cse0 (< c_~min3~0 c_~min2~0))))) (< (+ ~M~0 1) c_~N~0)))) is different from false [2022-07-21 09:11:08,417 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:11:08,418 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 139 treesize of output 107 [2022-07-21 09:11:08,422 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 38 treesize of output 26 [2022-07-21 09:11:08,457 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 9 treesize of output 3 [2022-07-21 09:11:10,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-21 09:11:10,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037112939] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:11:10,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:11:10,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 29, 30] total 81 [2022-07-21 09:11:10,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116623504] [2022-07-21 09:11:10,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:11:10,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-07-21 09:11:10,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:11:10,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-07-21 09:11:10,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1118, Invalid=5205, Unknown=1, NotChecked=156, Total=6480 [2022-07-21 09:11:10,096 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 159 [2022-07-21 09:11:10,108 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 1289 transitions, 17520 flow. Second operand has 81 states, 81 states have (on average 61.51851851851852) internal successors, (4983), 81 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:10,108 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:11:10,109 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 159 [2022-07-21 09:11:10,109 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:11:26,414 INFO L129 PetriNetUnfolder]: 21983/38033 cut-off events. [2022-07-21 09:11:26,414 INFO L130 PetriNetUnfolder]: For 565257/567175 co-relation queries the response was YES. [2022-07-21 09:11:27,528 INFO L84 FinitePrefix]: Finished finitePrefix Result has 239083 conditions, 38033 events. 21983/38033 cut-off events. For 565257/567175 co-relation queries the response was YES. Maximal size of possible extension queue 2181. Compared 345263 event pairs, 2143 based on Foata normal form. 1013/38460 useless extension candidates. Maximal degree in co-relation 238963. Up to 11455 conditions per place. [2022-07-21 09:11:27,800 INFO L132 encePairwiseOnDemand]: 117/159 looper letters, 749 selfloop transitions, 1060 changer transitions 22/1926 dead transitions. [2022-07-21 09:11:27,801 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 1926 transitions, 29141 flow [2022-07-21 09:11:27,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-21 09:11:27,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-07-21 09:11:27,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 4356 transitions. [2022-07-21 09:11:27,805 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.41509433962264153 [2022-07-21 09:11:27,805 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 4356 transitions. [2022-07-21 09:11:27,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 4356 transitions. [2022-07-21 09:11:27,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:11:27,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 4356 transitions. [2022-07-21 09:11:27,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 66.0) internal successors, (4356), 66 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:27,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 159.0) internal successors, (10653), 67 states have internal predecessors, (10653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:27,818 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 159.0) internal successors, (10653), 67 states have internal predecessors, (10653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:27,818 INFO L186 Difference]: Start difference. First operand has 431 places, 1289 transitions, 17520 flow. Second operand 66 states and 4356 transitions. [2022-07-21 09:11:27,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 1926 transitions, 29141 flow [2022-07-21 09:11:41,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 1926 transitions, 27098 flow, removed 964 selfloop flow, removed 37 redundant places. [2022-07-21 09:11:41,120 INFO L242 Difference]: Finished difference. Result has 473 places, 1572 transitions, 23910 flow [2022-07-21 09:11:41,121 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=16113, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=811, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=23910, PETRI_PLACES=473, PETRI_TRANSITIONS=1572} [2022-07-21 09:11:41,122 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 331 predicate places. [2022-07-21 09:11:41,122 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 1572 transitions, 23910 flow [2022-07-21 09:11:41,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 61.51851851851852) internal successors, (4983), 81 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:41,123 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:11:41,124 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] [2022-07-21 09:11:41,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 09:11:41,340 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 [2022-07-21 09:11:41,340 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:11:41,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:11:41,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1210384500, now seen corresponding path program 1 times [2022-07-21 09:11:41,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:11:41,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842605860] [2022-07-21 09:11:41,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:11:41,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:11:41,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:42,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:11:42,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842605860] [2022-07-21 09:11:42,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842605860] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:11:42,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608111365] [2022-07-21 09:11:42,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:11:42,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:42,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:11:42,173 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:11:42,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 09:11:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:42,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-21 09:11:42,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:11:42,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:11:42,323 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 09:11:42,324 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 [2022-07-21 09:11:42,548 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:11:42,548 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 [2022-07-21 09:11:43,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-07-21 09:11:43,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:11:43,441 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 [2022-07-21 09:11:43,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 09:11:43,618 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:11:43,618 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 [2022-07-21 09:11:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:43,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:11:43,976 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_297 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_297) c_~A~0.base) (+ c_~A~0.offset (* 4 c_~M~0))))) (or (not (< .cse0 c_~min2~0)) (not (< .cse0 c_~min3~0)) (= c_~min1~0 .cse0)))) (or (forall ((v_ArrVal_297 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_297) 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 [2022-07-21 09:11:44,049 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_296 (Array Int Int)) (v_ArrVal_297 (Array Int Int))) (let ((.cse0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_296) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_297) c_~A~0.base) (+ c_~A~0.offset (* 4 c_~M~0))))) (or (not (< .cse0 c_~min2~0)) (= c_~min1~0 .cse0) (not (< .cse0 c_~min3~0))))) (or (forall ((v_ArrVal_296 (Array Int Int)) (v_ArrVal_297 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_296) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_297) 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 [2022-07-21 09:11:44,141 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:11:44,141 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 573 treesize of output 509 [2022-07-21 09:11:44,149 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 342 treesize of output 306 [2022-07-21 09:11:44,153 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 370 treesize of output 298 [2022-07-21 09:11:46,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 09:11:46,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 09:11:46,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:46,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608111365] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:11:46,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:11:46,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 85 [2022-07-21 09:11:46,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816426715] [2022-07-21 09:11:46,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:11:46,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-07-21 09:11:46,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:11:46,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-07-21 09:11:46,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=805, Invalid=6007, Unknown=2, NotChecked=326, Total=7140 [2022-07-21 09:11:46,829 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 159 [2022-07-21 09:11:46,831 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 1572 transitions, 23910 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) [2022-07-21 09:11:46,831 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:11:46,831 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 159 [2022-07-21 09:11:46,831 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand