./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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-send-receive-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 15:23:24,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 15:23:24,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 15:23:24,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 15:23:24,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 15:23:24,576 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 15:23:24,577 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 15:23:24,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 15:23:24,583 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 15:23:24,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 15:23:24,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 15:23:24,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 15:23:24,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 15:23:24,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 15:23:24,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 15:23:24,594 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 15:23:24,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 15:23:24,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 15:23:24,597 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 15:23:24,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 15:23:24,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 15:23:24,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 15:23:24,603 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 15:23:24,604 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 15:23:24,607 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 15:23:24,607 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 15:23:24,607 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 15:23:24,608 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 15:23:24,608 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 15:23:24,609 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 15:23:24,609 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 15:23:24,609 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 15:23:24,610 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 15:23:24,610 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 15:23:24,611 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 15:23:24,611 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 15:23:24,611 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 15:23:24,611 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 15:23:24,611 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 15:23:24,612 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 15:23:24,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 15:23:24,613 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 15:23:24,645 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 15:23:24,646 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 15:23:24,646 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 15:23:24,646 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 15:23:24,647 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 15:23:24,647 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 15:23:24,647 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 15:23:24,648 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 15:23:24,648 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 15:23:24,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 15:23:24,648 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 15:23:24,649 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 15:23:24,649 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 15:23:24,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 15:23:24,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 15:23:24,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 15:23:24,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 15:23:24,650 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 15:23:24,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 15:23:24,650 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 15:23:24,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 15:23:24,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 15:23:24,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 15:23:24,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 15:23:24,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:23:24,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 15:23:24,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 15:23:24,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 15:23:24,652 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 15:23:24,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 15:23:24,653 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 15:23:24,653 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 15:23:24,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 15:23:24,653 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 15:23:24,653 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 [2021-12-21 15:23:24,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 15:23:24,849 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 15:23:24,852 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 15:23:24,852 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 15:23:24,853 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 15:23:24,854 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2021-12-21 15:23:24,917 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/230e8f00d/7464ebe1669b4070b7f7480371da45b9/FLAG3536433f2 [2021-12-21 15:23:25,223 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 15:23:25,224 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2021-12-21 15:23:25,234 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/230e8f00d/7464ebe1669b4070b7f7480371da45b9/FLAG3536433f2 [2021-12-21 15:23:25,645 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/230e8f00d/7464ebe1669b4070b7f7480371da45b9 [2021-12-21 15:23:25,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 15:23:25,649 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 15:23:25,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 15:23:25,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 15:23:25,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 15:23:25,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:23:25" (1/1) ... [2021-12-21 15:23:25,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d65710b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:25, skipping insertion in model container [2021-12-21 15:23:25,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:23:25" (1/1) ... [2021-12-21 15:23:25,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 15:23:25,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 15:23:25,870 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-send-receive-alt.wvr.c[2650,2663] [2021-12-21 15:23:25,884 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:23:25,889 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 15:23:25,926 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-send-receive-alt.wvr.c[2650,2663] [2021-12-21 15:23:25,930 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:23:25,941 INFO L208 MainTranslator]: Completed translation [2021-12-21 15:23:25,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:25 WrapperNode [2021-12-21 15:23:25,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 15:23:25,943 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 15:23:25,943 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 15:23:25,943 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 15:23:25,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:25" (1/1) ... [2021-12-21 15:23:25,964 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:25" (1/1) ... [2021-12-21 15:23:25,990 INFO L137 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 142 [2021-12-21 15:23:25,991 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 15:23:25,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 15:23:25,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 15:23:25,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 15:23:25,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:25" (1/1) ... [2021-12-21 15:23:25,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:25" (1/1) ... [2021-12-21 15:23:26,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:25" (1/1) ... [2021-12-21 15:23:26,010 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:25" (1/1) ... [2021-12-21 15:23:26,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:25" (1/1) ... [2021-12-21 15:23:26,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:25" (1/1) ... [2021-12-21 15:23:26,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:25" (1/1) ... [2021-12-21 15:23:26,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 15:23:26,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 15:23:26,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 15:23:26,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 15:23:26,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:25" (1/1) ... [2021-12-21 15:23:26,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:23:26,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:23:26,053 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) [2021-12-21 15:23:26,065 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 [2021-12-21 15:23:26,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 15:23:26,102 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-21 15:23:26,102 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-21 15:23:26,103 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-21 15:23:26,103 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-21 15:23:26,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 15:23:26,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 15:23:26,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 15:23:26,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-21 15:23:26,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-21 15:23:26,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 15:23:26,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 15:23:26,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 15:23:26,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 15:23:26,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 15:23:26,105 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-21 15:23:26,195 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 15:23:26,199 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 15:23:26,407 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 15:23:26,449 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 15:23:26,449 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-21 15:23:26,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:23:26 BoogieIcfgContainer [2021-12-21 15:23:26,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 15:23:26,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 15:23:26,452 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 15:23:26,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 15:23:26,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:23:25" (1/3) ... [2021-12-21 15:23:26,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79de55ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:23:26, skipping insertion in model container [2021-12-21 15:23:26,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:25" (2/3) ... [2021-12-21 15:23:26,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79de55ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:23:26, skipping insertion in model container [2021-12-21 15:23:26,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:23:26" (3/3) ... [2021-12-21 15:23:26,457 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2021-12-21 15:23:26,460 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-21 15:23:26,460 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 15:23:26,461 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 15:23:26,461 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-21 15:23:26,484 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,484 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,485 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,485 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,485 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,485 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,485 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,485 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,486 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,486 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,486 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,486 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,486 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,487 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,487 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,487 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,487 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,488 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,488 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,488 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,489 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,489 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,489 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,489 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,489 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,490 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,490 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,490 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,490 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,490 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,491 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,491 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,491 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,491 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,491 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,492 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,492 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,492 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,492 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,492 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,492 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,493 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,493 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,493 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,493 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,493 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,493 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,494 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,494 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,494 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,494 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,494 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,495 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,495 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,495 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,495 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,496 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,496 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,497 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,497 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,497 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,497 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,498 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,498 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,498 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,498 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,498 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,499 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,499 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,499 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,502 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,503 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,503 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,503 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,503 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,503 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,503 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,504 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,504 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,505 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,508 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,508 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,509 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,509 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,509 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,510 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,511 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:26,513 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-21 15:23:26,560 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 15:23:26,565 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 15:23:26,575 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-21 15:23:26,584 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 129 places, 133 transitions, 282 flow [2021-12-21 15:23:26,648 INFO L129 PetriNetUnfolder]: 11/131 cut-off events. [2021-12-21 15:23:26,648 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-21 15:23:26,652 INFO L84 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 131 events. 11/131 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2021-12-21 15:23:26,653 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 133 transitions, 282 flow [2021-12-21 15:23:26,657 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 122 transitions, 256 flow [2021-12-21 15:23:26,693 INFO L129 PetriNetUnfolder]: 11/121 cut-off events. [2021-12-21 15:23:26,693 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-21 15:23:26,694 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:26,694 INFO L254 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] [2021-12-21 15:23:26,695 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:23:26,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:26,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1382683983, now seen corresponding path program 1 times [2021-12-21 15:23:26,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:26,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300744301] [2021-12-21 15:23:26,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:26,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:26,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:26,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300744301] [2021-12-21 15:23:26,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300744301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:23:26,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:23:26,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 15:23:26,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416309613] [2021-12-21 15:23:26,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:23:26,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 15:23:26,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:26,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 15:23:26,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 15:23:26,923 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 133 [2021-12-21 15:23:26,928 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 122 transitions, 256 flow. Second operand has 2 states, 2 states have (on average 121.5) internal successors, (243), 2 states have internal predecessors, (243), 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) [2021-12-21 15:23:26,928 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:26,928 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 133 [2021-12-21 15:23:26,929 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:26,977 INFO L129 PetriNetUnfolder]: 8/122 cut-off events. [2021-12-21 15:23:26,978 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-12-21 15:23:26,979 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 122 events. 8/122 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 89 event pairs, 1 based on Foata normal form. 10/122 useless extension candidates. Maximal degree in co-relation 83. Up to 13 conditions per place. [2021-12-21 15:23:26,980 INFO L132 encePairwiseOnDemand]: 126/133 looper letters, 7 selfloop transitions, 0 changer transitions 3/115 dead transitions. [2021-12-21 15:23:26,980 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 115 transitions, 256 flow [2021-12-21 15:23:26,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 15:23:26,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-21 15:23:26,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 250 transitions. [2021-12-21 15:23:26,992 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9398496240601504 [2021-12-21 15:23:26,993 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 250 transitions. [2021-12-21 15:23:26,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 250 transitions. [2021-12-21 15:23:26,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:26,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 250 transitions. [2021-12-21 15:23:27,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 125.0) internal successors, (250), 2 states have internal predecessors, (250), 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) [2021-12-21 15:23:27,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 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) [2021-12-21 15:23:27,005 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 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) [2021-12-21 15:23:27,006 INFO L186 Difference]: Start difference. First operand has 118 places, 122 transitions, 256 flow. Second operand 2 states and 250 transitions. [2021-12-21 15:23:27,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 115 transitions, 256 flow [2021-12-21 15:23:27,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 115 transitions, 248 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-21 15:23:27,016 INFO L242 Difference]: Finished difference. Result has 115 places, 112 transitions, 228 flow [2021-12-21 15:23:27,018 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=228, PETRI_PLACES=115, PETRI_TRANSITIONS=112} [2021-12-21 15:23:27,028 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, -3 predicate places. [2021-12-21 15:23:27,028 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 112 transitions, 228 flow [2021-12-21 15:23:27,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 121.5) internal successors, (243), 2 states have internal predecessors, (243), 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) [2021-12-21 15:23:27,029 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:27,029 INFO L254 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] [2021-12-21 15:23:27,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 15:23:27,029 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:23:27,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:27,030 INFO L85 PathProgramCache]: Analyzing trace with hash 882365775, now seen corresponding path program 1 times [2021-12-21 15:23:27,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:27,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54999752] [2021-12-21 15:23:27,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:27,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:27,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:27,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:27,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:27,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54999752] [2021-12-21 15:23:27,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54999752] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:23:27,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:23:27,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:23:27,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621011507] [2021-12-21 15:23:27,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:23:27,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:23:27,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:27,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:23:27,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:23:27,213 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 133 [2021-12-21 15:23:27,214 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 112 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 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) [2021-12-21 15:23:27,214 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:27,214 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 133 [2021-12-21 15:23:27,214 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:27,311 INFO L129 PetriNetUnfolder]: 13/157 cut-off events. [2021-12-21 15:23:27,311 INFO L130 PetriNetUnfolder]: For 6/7 co-relation queries the response was YES. [2021-12-21 15:23:27,312 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 157 events. 13/157 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 261 event pairs, 1 based on Foata normal form. 2/149 useless extension candidates. Maximal degree in co-relation 199. Up to 19 conditions per place. [2021-12-21 15:23:27,314 INFO L132 encePairwiseOnDemand]: 128/133 looper letters, 23 selfloop transitions, 2 changer transitions 4/121 dead transitions. [2021-12-21 15:23:27,314 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 121 transitions, 307 flow [2021-12-21 15:23:27,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:23:27,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:23:27,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 540 transitions. [2021-12-21 15:23:27,318 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8120300751879699 [2021-12-21 15:23:27,318 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 540 transitions. [2021-12-21 15:23:27,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 540 transitions. [2021-12-21 15:23:27,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:27,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 540 transitions. [2021-12-21 15:23:27,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 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) [2021-12-21 15:23:27,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 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) [2021-12-21 15:23:27,324 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 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) [2021-12-21 15:23:27,324 INFO L186 Difference]: Start difference. First operand has 115 places, 112 transitions, 228 flow. Second operand 5 states and 540 transitions. [2021-12-21 15:23:27,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 121 transitions, 307 flow [2021-12-21 15:23:27,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 121 transitions, 307 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-21 15:23:27,328 INFO L242 Difference]: Finished difference. Result has 119 places, 113 transitions, 244 flow [2021-12-21 15:23:27,328 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=244, PETRI_PLACES=119, PETRI_TRANSITIONS=113} [2021-12-21 15:23:27,329 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2021-12-21 15:23:27,329 INFO L470 AbstractCegarLoop]: Abstraction has has 119 places, 113 transitions, 244 flow [2021-12-21 15:23:27,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 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) [2021-12-21 15:23:27,329 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:27,330 INFO L254 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] [2021-12-21 15:23:27,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 15:23:27,330 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:23:27,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:27,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1024793816, now seen corresponding path program 1 times [2021-12-21 15:23:27,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:27,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330240077] [2021-12-21 15:23:27,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:27,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:27,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:27,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:27,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330240077] [2021-12-21 15:23:27,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330240077] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:23:27,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:23:27,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 15:23:27,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011330025] [2021-12-21 15:23:27,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:23:27,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 15:23:27,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:27,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 15:23:27,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 15:23:27,527 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 133 [2021-12-21 15:23:27,528 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 113 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 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) [2021-12-21 15:23:27,528 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:27,528 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 133 [2021-12-21 15:23:27,528 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:27,596 INFO L129 PetriNetUnfolder]: 18/188 cut-off events. [2021-12-21 15:23:27,596 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2021-12-21 15:23:27,597 INFO L84 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 188 events. 18/188 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 350 event pairs, 3 based on Foata normal form. 3/175 useless extension candidates. Maximal degree in co-relation 240. Up to 30 conditions per place. [2021-12-21 15:23:27,598 INFO L132 encePairwiseOnDemand]: 127/133 looper letters, 14 selfloop transitions, 5 changer transitions 2/118 dead transitions. [2021-12-21 15:23:27,598 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 118 transitions, 298 flow [2021-12-21 15:23:27,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 15:23:27,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-21 15:23:27,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2021-12-21 15:23:27,600 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8796992481203008 [2021-12-21 15:23:27,600 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2021-12-21 15:23:27,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2021-12-21 15:23:27,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:27,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2021-12-21 15:23:27,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 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) [2021-12-21 15:23:27,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 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) [2021-12-21 15:23:27,602 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 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) [2021-12-21 15:23:27,603 INFO L186 Difference]: Start difference. First operand has 119 places, 113 transitions, 244 flow. Second operand 3 states and 351 transitions. [2021-12-21 15:23:27,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 118 transitions, 298 flow [2021-12-21 15:23:27,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 118 transitions, 292 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-12-21 15:23:27,605 INFO L242 Difference]: Finished difference. Result has 117 places, 115 transitions, 263 flow [2021-12-21 15:23:27,606 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=263, PETRI_PLACES=117, PETRI_TRANSITIONS=115} [2021-12-21 15:23:27,606 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, -1 predicate places. [2021-12-21 15:23:27,606 INFO L470 AbstractCegarLoop]: Abstraction has has 117 places, 115 transitions, 263 flow [2021-12-21 15:23:27,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 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) [2021-12-21 15:23:27,607 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:27,607 INFO L254 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] [2021-12-21 15:23:27,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 15:23:27,607 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:23:27,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:27,608 INFO L85 PathProgramCache]: Analyzing trace with hash 315089418, now seen corresponding path program 1 times [2021-12-21 15:23:27,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:27,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799046407] [2021-12-21 15:23:27,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:27,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:27,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:27,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:27,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799046407] [2021-12-21 15:23:27,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799046407] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:23:27,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:23:27,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 15:23:27,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466704509] [2021-12-21 15:23:27,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:23:27,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 15:23:27,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:27,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 15:23:27,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 15:23:27,662 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 133 [2021-12-21 15:23:27,662 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 115 transitions, 263 flow. Second operand has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 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) [2021-12-21 15:23:27,662 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:27,662 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 133 [2021-12-21 15:23:27,663 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:27,700 INFO L129 PetriNetUnfolder]: 29/229 cut-off events. [2021-12-21 15:23:27,700 INFO L130 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2021-12-21 15:23:27,702 INFO L84 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 229 events. 29/229 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 673 event pairs, 7 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 322. Up to 46 conditions per place. [2021-12-21 15:23:27,702 INFO L132 encePairwiseOnDemand]: 130/133 looper letters, 16 selfloop transitions, 2 changer transitions 1/120 dead transitions. [2021-12-21 15:23:27,702 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 120 transitions, 316 flow [2021-12-21 15:23:27,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 15:23:27,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-21 15:23:27,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2021-12-21 15:23:27,704 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9022556390977443 [2021-12-21 15:23:27,704 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2021-12-21 15:23:27,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2021-12-21 15:23:27,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:27,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2021-12-21 15:23:27,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 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) [2021-12-21 15:23:27,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 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) [2021-12-21 15:23:27,706 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 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) [2021-12-21 15:23:27,707 INFO L186 Difference]: Start difference. First operand has 117 places, 115 transitions, 263 flow. Second operand 3 states and 360 transitions. [2021-12-21 15:23:27,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 120 transitions, 316 flow [2021-12-21 15:23:27,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 120 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-21 15:23:27,710 INFO L242 Difference]: Finished difference. Result has 119 places, 115 transitions, 266 flow [2021-12-21 15:23:27,710 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=119, PETRI_TRANSITIONS=115} [2021-12-21 15:23:27,711 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2021-12-21 15:23:27,712 INFO L470 AbstractCegarLoop]: Abstraction has has 119 places, 115 transitions, 266 flow [2021-12-21 15:23:27,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 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) [2021-12-21 15:23:27,712 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:27,712 INFO L254 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] [2021-12-21 15:23:27,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 15:23:27,713 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:23:27,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:27,713 INFO L85 PathProgramCache]: Analyzing trace with hash -93519548, now seen corresponding path program 1 times [2021-12-21 15:23:27,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:27,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215003079] [2021-12-21 15:23:27,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:27,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:27,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:27,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:27,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215003079] [2021-12-21 15:23:27,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215003079] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:23:27,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:23:27,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 15:23:27,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941518095] [2021-12-21 15:23:27,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:23:27,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:23:27,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:27,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:23:27,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:23:27,832 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 133 [2021-12-21 15:23:27,833 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 115 transitions, 266 flow. Second operand has 6 states, 6 states have (on average 105.83333333333333) internal successors, (635), 6 states have internal predecessors, (635), 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) [2021-12-21 15:23:27,833 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:27,833 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 133 [2021-12-21 15:23:27,833 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:27,935 INFO L129 PetriNetUnfolder]: 24/281 cut-off events. [2021-12-21 15:23:27,936 INFO L130 PetriNetUnfolder]: For 50/54 co-relation queries the response was YES. [2021-12-21 15:23:27,937 INFO L84 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 281 events. 24/281 cut-off events. For 50/54 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 878 event pairs, 12 based on Foata normal form. 3/266 useless extension candidates. Maximal degree in co-relation 398. Up to 45 conditions per place. [2021-12-21 15:23:27,938 INFO L132 encePairwiseOnDemand]: 125/133 looper letters, 22 selfloop transitions, 6 changer transitions 9/128 dead transitions. [2021-12-21 15:23:27,938 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 128 transitions, 376 flow [2021-12-21 15:23:27,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:23:27,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-21 15:23:27,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 756 transitions. [2021-12-21 15:23:27,940 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8120300751879699 [2021-12-21 15:23:27,940 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 756 transitions. [2021-12-21 15:23:27,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 756 transitions. [2021-12-21 15:23:27,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:27,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 756 transitions. [2021-12-21 15:23:27,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 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) [2021-12-21 15:23:27,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 133.0) internal successors, (1064), 8 states have internal predecessors, (1064), 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) [2021-12-21 15:23:27,949 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 133.0) internal successors, (1064), 8 states have internal predecessors, (1064), 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) [2021-12-21 15:23:27,949 INFO L186 Difference]: Start difference. First operand has 119 places, 115 transitions, 266 flow. Second operand 7 states and 756 transitions. [2021-12-21 15:23:27,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 128 transitions, 376 flow [2021-12-21 15:23:27,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 128 transitions, 374 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-21 15:23:27,954 INFO L242 Difference]: Finished difference. Result has 126 places, 116 transitions, 286 flow [2021-12-21 15:23:27,954 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=286, PETRI_PLACES=126, PETRI_TRANSITIONS=116} [2021-12-21 15:23:27,956 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 8 predicate places. [2021-12-21 15:23:27,956 INFO L470 AbstractCegarLoop]: Abstraction has has 126 places, 116 transitions, 286 flow [2021-12-21 15:23:27,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 105.83333333333333) internal successors, (635), 6 states have internal predecessors, (635), 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) [2021-12-21 15:23:27,957 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:27,957 INFO L254 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] [2021-12-21 15:23:27,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 15:23:27,958 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:23:27,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:27,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1414783415, now seen corresponding path program 1 times [2021-12-21 15:23:27,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:27,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710571849] [2021-12-21 15:23:27,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:27,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:23:28,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:28,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710571849] [2021-12-21 15:23:28,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710571849] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:23:28,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925151199] [2021-12-21 15:23:28,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:28,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:23:28,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:23:28,168 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) [2021-12-21 15:23:28,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 15:23:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:28,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-21 15:23:28,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:23:28,422 INFO L387 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 [2021-12-21 15:23:28,984 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 15:23:28,984 INFO L387 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 [2021-12-21 15:23:29,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-21 15:23:29,552 INFO L387 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 [2021-12-21 15:23:29,634 INFO L387 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 [2021-12-21 15:23:29,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-21 15:23:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:29,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:23:31,119 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 15:23:31,120 INFO L387 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 96 treesize of output 72 [2021-12-21 15:23:31,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 15:23:31,131 INFO L387 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 494 treesize of output 462 [2021-12-21 15:23:31,142 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 15:23:31,142 INFO L387 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 446 treesize of output 390 [2021-12-21 15:23:31,154 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 15:23:31,154 INFO L387 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 374 treesize of output 354 [2021-12-21 15:23:32,524 INFO L387 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 [2021-12-21 15:23:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:32,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925151199] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:23:32,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:23:32,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 27, 25] total 51 [2021-12-21 15:23:32,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852490391] [2021-12-21 15:23:32,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:23:32,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-21 15:23:32,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:32,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-21 15:23:32,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=612, Invalid=1882, Unknown=56, NotChecked=0, Total=2550 [2021-12-21 15:23:32,584 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 133 [2021-12-21 15:23:32,587 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 116 transitions, 286 flow. Second operand has 51 states, 51 states have (on average 61.80392156862745) internal successors, (3152), 51 states have internal predecessors, (3152), 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) [2021-12-21 15:23:32,587 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:32,587 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 133 [2021-12-21 15:23:32,587 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:34,235 INFO L129 PetriNetUnfolder]: 167/936 cut-off events. [2021-12-21 15:23:34,235 INFO L130 PetriNetUnfolder]: For 195/195 co-relation queries the response was YES. [2021-12-21 15:23:34,238 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1525 conditions, 936 events. 167/936 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5964 event pairs, 14 based on Foata normal form. 4/866 useless extension candidates. Maximal degree in co-relation 1516. Up to 86 conditions per place. [2021-12-21 15:23:34,240 INFO L132 encePairwiseOnDemand]: 101/133 looper letters, 88 selfloop transitions, 39 changer transitions 34/215 dead transitions. [2021-12-21 15:23:34,240 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 215 transitions, 886 flow [2021-12-21 15:23:34,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-21 15:23:34,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-12-21 15:23:34,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2702 transitions. [2021-12-21 15:23:34,245 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4724602203182375 [2021-12-21 15:23:34,245 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2702 transitions. [2021-12-21 15:23:34,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2702 transitions. [2021-12-21 15:23:34,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:34,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2702 transitions. [2021-12-21 15:23:34,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 62.83720930232558) internal successors, (2702), 43 states have internal predecessors, (2702), 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) [2021-12-21 15:23:34,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 133.0) internal successors, (5852), 44 states have internal predecessors, (5852), 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) [2021-12-21 15:23:34,275 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 133.0) internal successors, (5852), 44 states have internal predecessors, (5852), 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) [2021-12-21 15:23:34,276 INFO L186 Difference]: Start difference. First operand has 126 places, 116 transitions, 286 flow. Second operand 43 states and 2702 transitions. [2021-12-21 15:23:34,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 215 transitions, 886 flow [2021-12-21 15:23:34,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 215 transitions, 872 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-12-21 15:23:34,280 INFO L242 Difference]: Finished difference. Result has 183 places, 136 transitions, 505 flow [2021-12-21 15:23:34,281 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=505, PETRI_PLACES=183, PETRI_TRANSITIONS=136} [2021-12-21 15:23:34,281 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 65 predicate places. [2021-12-21 15:23:34,282 INFO L470 AbstractCegarLoop]: Abstraction has has 183 places, 136 transitions, 505 flow [2021-12-21 15:23:34,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 61.80392156862745) internal successors, (3152), 51 states have internal predecessors, (3152), 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) [2021-12-21 15:23:34,283 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:34,283 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:23:34,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 15:23:34,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-21 15:23:34,496 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:23:34,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:34,496 INFO L85 PathProgramCache]: Analyzing trace with hash 400817075, now seen corresponding path program 2 times [2021-12-21 15:23:34,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:34,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830305777] [2021-12-21 15:23:34,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:34,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:34,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:34,552 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:23:34,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:34,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830305777] [2021-12-21 15:23:34,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830305777] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:23:34,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3494495] [2021-12-21 15:23:34,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:23:34,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:23:34,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:23:34,554 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) [2021-12-21 15:23:34,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 15:23:34,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:23:34,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:23:34,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 15:23:34,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:23:34,784 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:23:34,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:23:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:23:35,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3494495] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:23:35,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:23:35,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 6] total 9 [2021-12-21 15:23:35,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170785768] [2021-12-21 15:23:35,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:23:35,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 15:23:35,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:35,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 15:23:35,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-12-21 15:23:35,154 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 133 [2021-12-21 15:23:35,155 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 136 transitions, 505 flow. Second operand has 9 states, 9 states have (on average 115.55555555555556) internal successors, (1040), 9 states have internal predecessors, (1040), 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) [2021-12-21 15:23:35,155 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:35,155 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 133 [2021-12-21 15:23:35,155 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:35,296 INFO L129 PetriNetUnfolder]: 153/1198 cut-off events. [2021-12-21 15:23:35,297 INFO L130 PetriNetUnfolder]: For 1072/1080 co-relation queries the response was YES. [2021-12-21 15:23:35,301 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2176 conditions, 1198 events. 153/1198 cut-off events. For 1072/1080 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 8170 event pairs, 20 based on Foata normal form. 10/1108 useless extension candidates. Maximal degree in co-relation 2147. Up to 122 conditions per place. [2021-12-21 15:23:35,304 INFO L132 encePairwiseOnDemand]: 127/133 looper letters, 29 selfloop transitions, 30 changer transitions 0/170 dead transitions. [2021-12-21 15:23:35,305 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 170 transitions, 841 flow [2021-12-21 15:23:35,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 15:23:35,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-21 15:23:35,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 708 transitions. [2021-12-21 15:23:35,307 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8872180451127819 [2021-12-21 15:23:35,307 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 708 transitions. [2021-12-21 15:23:35,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 708 transitions. [2021-12-21 15:23:35,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:35,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 708 transitions. [2021-12-21 15:23:35,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.0) internal successors, (708), 6 states have internal predecessors, (708), 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) [2021-12-21 15:23:35,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 133.0) internal successors, (931), 7 states have internal predecessors, (931), 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) [2021-12-21 15:23:35,311 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 133.0) internal successors, (931), 7 states have internal predecessors, (931), 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) [2021-12-21 15:23:35,311 INFO L186 Difference]: Start difference. First operand has 183 places, 136 transitions, 505 flow. Second operand 6 states and 708 transitions. [2021-12-21 15:23:35,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 170 transitions, 841 flow [2021-12-21 15:23:35,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 170 transitions, 735 flow, removed 31 selfloop flow, removed 26 redundant places. [2021-12-21 15:23:35,317 INFO L242 Difference]: Finished difference. Result has 156 places, 161 transitions, 724 flow [2021-12-21 15:23:35,317 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=724, PETRI_PLACES=156, PETRI_TRANSITIONS=161} [2021-12-21 15:23:35,318 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 38 predicate places. [2021-12-21 15:23:35,318 INFO L470 AbstractCegarLoop]: Abstraction has has 156 places, 161 transitions, 724 flow [2021-12-21 15:23:35,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 115.55555555555556) internal successors, (1040), 9 states have internal predecessors, (1040), 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) [2021-12-21 15:23:35,318 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:35,319 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:23:35,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 15:23:35,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-21 15:23:35,538 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:23:35,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:35,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1811797277, now seen corresponding path program 3 times [2021-12-21 15:23:35,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:35,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893669199] [2021-12-21 15:23:35,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:35,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:35,606 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 15:23:35,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:35,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893669199] [2021-12-21 15:23:35,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893669199] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:23:35,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:23:35,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 15:23:35,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626012496] [2021-12-21 15:23:35,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:23:35,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:23:35,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:35,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:23:35,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 15:23:35,611 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 133 [2021-12-21 15:23:35,612 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 161 transitions, 724 flow. Second operand has 4 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 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) [2021-12-21 15:23:35,612 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:35,612 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 133 [2021-12-21 15:23:35,612 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:35,791 INFO L129 PetriNetUnfolder]: 213/1816 cut-off events. [2021-12-21 15:23:35,792 INFO L130 PetriNetUnfolder]: For 1476/1476 co-relation queries the response was YES. [2021-12-21 15:23:35,800 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3202 conditions, 1816 events. 213/1816 cut-off events. For 1476/1476 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 15080 event pairs, 43 based on Foata normal form. 69/1719 useless extension candidates. Maximal degree in co-relation 3178. Up to 244 conditions per place. [2021-12-21 15:23:35,805 INFO L132 encePairwiseOnDemand]: 129/133 looper letters, 67 selfloop transitions, 4 changer transitions 1/183 dead transitions. [2021-12-21 15:23:35,805 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 183 transitions, 1049 flow [2021-12-21 15:23:35,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 15:23:35,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-21 15:23:35,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 474 transitions. [2021-12-21 15:23:35,807 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8909774436090225 [2021-12-21 15:23:35,807 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 474 transitions. [2021-12-21 15:23:35,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 474 transitions. [2021-12-21 15:23:35,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:35,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 474 transitions. [2021-12-21 15:23:35,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:23:35,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 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) [2021-12-21 15:23:35,810 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 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) [2021-12-21 15:23:35,810 INFO L186 Difference]: Start difference. First operand has 156 places, 161 transitions, 724 flow. Second operand 4 states and 474 transitions. [2021-12-21 15:23:35,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 183 transitions, 1049 flow [2021-12-21 15:23:35,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 183 transitions, 1003 flow, removed 22 selfloop flow, removed 1 redundant places. [2021-12-21 15:23:35,818 INFO L242 Difference]: Finished difference. Result has 160 places, 159 transitions, 685 flow [2021-12-21 15:23:35,818 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=685, PETRI_PLACES=160, PETRI_TRANSITIONS=159} [2021-12-21 15:23:35,820 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 42 predicate places. [2021-12-21 15:23:35,820 INFO L470 AbstractCegarLoop]: Abstraction has has 160 places, 159 transitions, 685 flow [2021-12-21 15:23:35,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 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) [2021-12-21 15:23:35,820 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:35,821 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:23:35,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 15:23:35,821 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:23:35,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:35,821 INFO L85 PathProgramCache]: Analyzing trace with hash -193834779, now seen corresponding path program 1 times [2021-12-21 15:23:35,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:35,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080855032] [2021-12-21 15:23:35,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:35,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:36,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:36,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080855032] [2021-12-21 15:23:36,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080855032] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:23:36,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775204244] [2021-12-21 15:23:36,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:36,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:23:36,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:23:36,703 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) [2021-12-21 15:23:36,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 15:23:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:36,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-21 15:23:36,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:23:38,343 INFO L353 Elim1Store]: treesize reduction 93, result has 7.0 percent of original size [2021-12-21 15:23:38,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 22 [2021-12-21 15:23:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:38,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:23:38,907 INFO L353 Elim1Store]: treesize reduction 59, result has 41.0 percent of original size [2021-12-21 15:23:38,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 66 [2021-12-21 15:23:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:41,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775204244] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:23:41,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:23:41,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 23] total 61 [2021-12-21 15:23:41,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033840481] [2021-12-21 15:23:41,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:23:41,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-21 15:23:41,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:41,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-21 15:23:41,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=3186, Unknown=0, NotChecked=0, Total=3660 [2021-12-21 15:23:41,717 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 133 [2021-12-21 15:23:41,720 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 159 transitions, 685 flow. Second operand has 61 states, 61 states have (on average 67.75409836065573) internal successors, (4133), 61 states have internal predecessors, (4133), 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) [2021-12-21 15:23:41,720 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:41,720 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 133 [2021-12-21 15:23:41,720 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:46,689 INFO L129 PetriNetUnfolder]: 1759/7006 cut-off events. [2021-12-21 15:23:46,689 INFO L130 PetriNetUnfolder]: For 7009/7015 co-relation queries the response was YES. [2021-12-21 15:23:46,711 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14570 conditions, 7006 events. 1759/7006 cut-off events. For 7009/7015 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 71937 event pairs, 399 based on Foata normal form. 10/6342 useless extension candidates. Maximal degree in co-relation 14543. Up to 1909 conditions per place. [2021-12-21 15:23:46,724 INFO L132 encePairwiseOnDemand]: 95/133 looper letters, 148 selfloop transitions, 128 changer transitions 160/493 dead transitions. [2021-12-21 15:23:46,724 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 493 transitions, 3064 flow [2021-12-21 15:23:46,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-21 15:23:46,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-12-21 15:23:46,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 5559 transitions. [2021-12-21 15:23:46,733 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5224624060150376 [2021-12-21 15:23:46,733 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 5559 transitions. [2021-12-21 15:23:46,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 5559 transitions. [2021-12-21 15:23:46,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:46,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 5559 transitions. [2021-12-21 15:23:46,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 69.4875) internal successors, (5559), 80 states have internal predecessors, (5559), 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) [2021-12-21 15:23:46,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 133.0) internal successors, (10773), 81 states have internal predecessors, (10773), 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) [2021-12-21 15:23:46,786 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 133.0) internal successors, (10773), 81 states have internal predecessors, (10773), 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) [2021-12-21 15:23:46,787 INFO L186 Difference]: Start difference. First operand has 160 places, 159 transitions, 685 flow. Second operand 80 states and 5559 transitions. [2021-12-21 15:23:46,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 493 transitions, 3064 flow [2021-12-21 15:23:46,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 493 transitions, 3037 flow, removed 13 selfloop flow, removed 1 redundant places. [2021-12-21 15:23:46,805 INFO L242 Difference]: Finished difference. Result has 278 places, 256 transitions, 1908 flow [2021-12-21 15:23:46,805 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=1908, PETRI_PLACES=278, PETRI_TRANSITIONS=256} [2021-12-21 15:23:46,806 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 160 predicate places. [2021-12-21 15:23:46,806 INFO L470 AbstractCegarLoop]: Abstraction has has 278 places, 256 transitions, 1908 flow [2021-12-21 15:23:46,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 67.75409836065573) internal successors, (4133), 61 states have internal predecessors, (4133), 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) [2021-12-21 15:23:46,808 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:46,808 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:23:46,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 15:23:47,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:23:47,025 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:23:47,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:47,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1730009969, now seen corresponding path program 2 times [2021-12-21 15:23:47,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:47,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892780961] [2021-12-21 15:23:47,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:47,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 15:23:47,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:47,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892780961] [2021-12-21 15:23:47,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892780961] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:23:47,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115230553] [2021-12-21 15:23:47,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:23:47,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:23:47,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:23:47,183 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) [2021-12-21 15:23:47,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 15:23:47,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:23:47,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:23:47,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-21 15:23:47,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:23:47,301 INFO L387 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 [2021-12-21 15:23:47,669 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 15:23:47,669 INFO L387 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 [2021-12-21 15:23:47,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-21 15:23:48,224 INFO L387 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 [2021-12-21 15:23:48,288 INFO L387 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 [2021-12-21 15:23:48,704 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-21 15:23:48,704 INFO L387 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 48 treesize of output 14 [2021-12-21 15:23:48,735 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:48,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:23:50,307 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 15:23:50,307 INFO L387 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 185 treesize of output 125 [2021-12-21 15:23:50,332 INFO L353 Elim1Store]: treesize reduction 64, result has 37.9 percent of original size [2021-12-21 15:23:50,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 384 treesize of output 371 [2021-12-21 15:23:50,363 INFO L353 Elim1Store]: treesize reduction 64, result has 37.9 percent of original size [2021-12-21 15:23:50,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 333 treesize of output 293 [2021-12-21 15:23:50,392 INFO L353 Elim1Store]: treesize reduction 64, result has 37.9 percent of original size [2021-12-21 15:23:50,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 255 treesize of output 254 [2021-12-21 15:23:53,385 INFO L387 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 [2021-12-21 15:23:53,419 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:53,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115230553] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:23:53,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:23:53,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 30, 28] total 58 [2021-12-21 15:23:53,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851609536] [2021-12-21 15:23:53,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:23:53,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-21 15:23:53,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:53,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-21 15:23:53,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=744, Invalid=2492, Unknown=70, NotChecked=0, Total=3306 [2021-12-21 15:23:53,425 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 133 [2021-12-21 15:23:53,427 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 256 transitions, 1908 flow. Second operand has 58 states, 58 states have (on average 61.793103448275865) internal successors, (3584), 58 states have internal predecessors, (3584), 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) [2021-12-21 15:23:53,427 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:53,427 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 133 [2021-12-21 15:23:53,427 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:58,596 INFO L129 PetriNetUnfolder]: 1717/9759 cut-off events. [2021-12-21 15:23:58,596 INFO L130 PetriNetUnfolder]: For 94789/95089 co-relation queries the response was YES. [2021-12-21 15:23:58,690 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40073 conditions, 9759 events. 1717/9759 cut-off events. For 94789/95089 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 112745 event pairs, 207 based on Foata normal form. 166/9370 useless extension candidates. Maximal degree in co-relation 40006. Up to 1762 conditions per place. [2021-12-21 15:23:58,728 INFO L132 encePairwiseOnDemand]: 101/133 looper letters, 214 selfloop transitions, 189 changer transitions 88/552 dead transitions. [2021-12-21 15:23:58,728 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 552 transitions, 6590 flow [2021-12-21 15:23:58,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-21 15:23:58,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-12-21 15:23:58,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 4854 transitions. [2021-12-21 15:23:58,744 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.47397715066887997 [2021-12-21 15:23:58,744 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 4854 transitions. [2021-12-21 15:23:58,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 4854 transitions. [2021-12-21 15:23:58,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:58,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 4854 transitions. [2021-12-21 15:23:58,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 63.03896103896104) internal successors, (4854), 77 states have internal predecessors, (4854), 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) [2021-12-21 15:23:58,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 133.0) internal successors, (10374), 78 states have internal predecessors, (10374), 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) [2021-12-21 15:23:58,787 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 133.0) internal successors, (10374), 78 states have internal predecessors, (10374), 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) [2021-12-21 15:23:58,803 INFO L186 Difference]: Start difference. First operand has 278 places, 256 transitions, 1908 flow. Second operand 77 states and 4854 transitions. [2021-12-21 15:23:58,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 552 transitions, 6590 flow [2021-12-21 15:23:58,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 552 transitions, 5510 flow, removed 514 selfloop flow, removed 38 redundant places. [2021-12-21 15:23:58,986 INFO L242 Difference]: Finished difference. Result has 333 places, 357 transitions, 3406 flow [2021-12-21 15:23:58,987 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=1660, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=3406, PETRI_PLACES=333, PETRI_TRANSITIONS=357} [2021-12-21 15:23:58,987 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 215 predicate places. [2021-12-21 15:23:58,988 INFO L470 AbstractCegarLoop]: Abstraction has has 333 places, 357 transitions, 3406 flow [2021-12-21 15:23:58,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 61.793103448275865) internal successors, (3584), 58 states have internal predecessors, (3584), 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) [2021-12-21 15:23:58,989 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:58,989 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:23:59,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 15:23:59,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:23:59,203 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:23:59,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:59,204 INFO L85 PathProgramCache]: Analyzing trace with hash 221263351, now seen corresponding path program 3 times [2021-12-21 15:23:59,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:59,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6100582] [2021-12-21 15:23:59,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:59,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:24:00,423 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:24:00,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:24:00,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6100582] [2021-12-21 15:24:00,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6100582] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:24:00,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254065182] [2021-12-21 15:24:00,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 15:24:00,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:24:00,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:24:00,425 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) [2021-12-21 15:24:00,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 15:24:00,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-21 15:24:00,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:24:00,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-21 15:24:00,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:24:01,076 INFO L387 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 15 treesize of output 11 [2021-12-21 15:24:01,232 INFO L387 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 15 treesize of output 11 [2021-12-21 15:24:01,558 INFO L387 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 [2021-12-21 15:24:01,636 INFO L387 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 [2021-12-21 15:24:02,440 INFO L353 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2021-12-21 15:24:02,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 17 [2021-12-21 15:24:02,472 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:24:02,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:24:07,562 INFO L353 Elim1Store]: treesize reduction 28, result has 54.8 percent of original size [2021-12-21 15:24:07,562 INFO L387 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 2 case distinctions, treesize of input 226 treesize of output 145 [2021-12-21 15:24:07,698 INFO L353 Elim1Store]: treesize reduction 62, result has 62.4 percent of original size [2021-12-21 15:24:07,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 821 treesize of output 815 [2021-12-21 15:24:07,743 INFO L353 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2021-12-21 15:24:07,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 700 treesize of output 676 [2021-12-21 15:24:07,786 INFO L353 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2021-12-21 15:24:07,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 624 treesize of output 524 [2021-12-21 15:24:24,040 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:24:24,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254065182] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:24:24,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:24:24,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32, 30] total 80 [2021-12-21 15:24:24,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959027916] [2021-12-21 15:24:24,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:24:24,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-21 15:24:24,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:24:24,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-21 15:24:24,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=5725, Unknown=59, NotChecked=0, Total=6320 [2021-12-21 15:24:24,045 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 133 [2021-12-21 15:24:24,048 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 357 transitions, 3406 flow. Second operand has 80 states, 80 states have (on average 60.225) internal successors, (4818), 80 states have internal predecessors, (4818), 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) [2021-12-21 15:24:24,048 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:24:24,048 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 133 [2021-12-21 15:24:24,048 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand