./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/bench-exp3x3.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/bench-exp3x3.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 753355d7d8c08568df49ed9a7977f84d185e0dbf04984bcb7908b11aa84a04b9 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 15:15:12,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 15:15:12,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 15:15:12,732 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 15:15:12,733 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 15:15:12,733 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 15:15:12,734 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 15:15:12,735 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 15:15:12,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 15:15:12,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 15:15:12,738 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 15:15:12,738 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 15:15:12,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 15:15:12,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 15:15:12,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 15:15:12,741 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 15:15:12,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 15:15:12,742 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 15:15:12,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 15:15:12,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 15:15:12,744 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 15:15:12,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 15:15:12,752 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 15:15:12,753 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 15:15:12,754 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 15:15:12,755 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 15:15:12,755 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 15:15:12,755 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 15:15:12,756 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 15:15:12,756 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 15:15:12,756 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 15:15:12,757 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 15:15:12,757 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 15:15:12,758 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 15:15:12,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 15:15:12,758 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 15:15:12,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 15:15:12,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 15:15:12,759 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 15:15:12,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 15:15:12,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 15:15:12,762 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 15:15:12,788 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 15:15:12,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 15:15:12,788 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 15:15:12,788 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 15:15:12,789 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 15:15:12,789 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 15:15:12,790 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 15:15:12,790 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 15:15:12,790 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 15:15:12,790 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 15:15:12,790 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 15:15:12,790 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 15:15:12,790 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 15:15:12,790 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 15:15:12,791 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 15:15:12,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 15:15:12,791 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 15:15:12,791 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 15:15:12,791 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 15:15:12,791 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 15:15:12,791 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 15:15:12,792 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 15:15:12,792 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 15:15:12,792 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 15:15:12,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:15:12,792 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 15:15:12,792 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 15:15:12,793 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 15:15:12,794 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 15:15:12,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 15:15:12,794 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 15:15:12,794 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 15:15:12,794 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 15:15:12,794 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 15:15:12,795 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 753355d7d8c08568df49ed9a7977f84d185e0dbf04984bcb7908b11aa84a04b9 [2021-12-21 15:15:12,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 15:15:13,000 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 15:15:13,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 15:15:13,003 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 15:15:13,004 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 15:15:13,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/bench-exp3x3.wvr.c [2021-12-21 15:15:13,065 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cdfd8dce/ca28aa125d6d4e04b02105461c091e9d/FLAGc0dd2fa43 [2021-12-21 15:15:13,443 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 15:15:13,444 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp3x3.wvr.c [2021-12-21 15:15:13,448 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cdfd8dce/ca28aa125d6d4e04b02105461c091e9d/FLAGc0dd2fa43 [2021-12-21 15:15:13,868 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cdfd8dce/ca28aa125d6d4e04b02105461c091e9d [2021-12-21 15:15:13,869 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 15:15:13,870 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 15:15:13,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 15:15:13,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 15:15:13,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 15:15:13,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:15:13" (1/1) ... [2021-12-21 15:15:13,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a9f0bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:15:13, skipping insertion in model container [2021-12-21 15:15:13,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:15:13" (1/1) ... [2021-12-21 15:15:13,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 15:15:13,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 15:15:14,042 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/bench-exp3x3.wvr.c[2625,2638] [2021-12-21 15:15:14,052 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:15:14,058 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 15:15:14,083 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/bench-exp3x3.wvr.c[2625,2638] [2021-12-21 15:15:14,084 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:15:14,093 INFO L208 MainTranslator]: Completed translation [2021-12-21 15:15:14,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:15:14 WrapperNode [2021-12-21 15:15:14,094 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 15:15:14,094 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 15:15:14,095 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 15:15:14,095 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 15:15:14,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:15:14" (1/1) ... [2021-12-21 15:15:14,105 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:15:14" (1/1) ... [2021-12-21 15:15:14,119 INFO L137 Inliner]: procedures = 22, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 125 [2021-12-21 15:15:14,120 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 15:15:14,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 15:15:14,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 15:15:14,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 15:15:14,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:15:14" (1/1) ... [2021-12-21 15:15:14,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:15:14" (1/1) ... [2021-12-21 15:15:14,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:15:14" (1/1) ... [2021-12-21 15:15:14,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:15:14" (1/1) ... [2021-12-21 15:15:14,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:15:14" (1/1) ... [2021-12-21 15:15:14,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:15:14" (1/1) ... [2021-12-21 15:15:14,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:15:14" (1/1) ... [2021-12-21 15:15:14,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 15:15:14,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 15:15:14,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 15:15:14,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 15:15:14,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:15:14" (1/1) ... [2021-12-21 15:15:14,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:15:14,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:15:14,204 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 15:15:14,210 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 15:15:14,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 15:15:14,230 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-21 15:15:14,230 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-21 15:15:14,230 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-21 15:15:14,230 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-21 15:15:14,230 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-21 15:15:14,230 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-21 15:15:14,231 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-12-21 15:15:14,231 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-12-21 15:15:14,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 15:15:14,232 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-12-21 15:15:14,232 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-12-21 15:15:14,232 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-12-21 15:15:14,232 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-12-21 15:15:14,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 15:15:14,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 15:15:14,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 15:15:14,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 15:15:14,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 15:15:14,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 15:15:14,235 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 15:15:14,328 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 15:15:14,329 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 15:15:14,533 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 15:15:14,540 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 15:15:14,540 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-21 15:15:14,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:15:14 BoogieIcfgContainer [2021-12-21 15:15:14,541 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 15:15:14,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 15:15:14,543 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 15:15:14,545 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 15:15:14,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:15:13" (1/3) ... [2021-12-21 15:15:14,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe28bca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:15:14, skipping insertion in model container [2021-12-21 15:15:14,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:15:14" (2/3) ... [2021-12-21 15:15:14,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe28bca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:15:14, skipping insertion in model container [2021-12-21 15:15:14,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:15:14" (3/3) ... [2021-12-21 15:15:14,547 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp3x3.wvr.c [2021-12-21 15:15:14,567 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-21 15:15:14,567 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 15:15:14,567 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 15:15:14,567 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-21 15:15:14,616 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork4_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,616 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork4_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,616 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork4_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,616 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork4_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,617 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,618 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,618 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,618 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,619 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,619 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,619 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,619 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,620 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork5_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,621 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork5_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,621 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork5_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,621 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork5_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,622 WARN L322 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,622 WARN L322 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,622 WARN L322 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,622 WARN L322 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,623 WARN L322 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,624 WARN L322 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,624 WARN L322 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,624 WARN L322 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,626 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,626 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,628 WARN L322 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,628 WARN L322 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,628 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,629 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,629 WARN L322 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,630 WARN L322 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,630 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork4_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,630 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork4_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,631 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork5_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,631 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork5_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:14,638 INFO L148 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2021-12-21 15:15:14,667 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 15:15:14,672 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 15:15:14,672 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-12-21 15:15:14,681 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 174 places, 169 transitions, 386 flow [2021-12-21 15:15:14,734 INFO L129 PetriNetUnfolder]: 14/163 cut-off events. [2021-12-21 15:15:14,735 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-12-21 15:15:14,742 INFO L84 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 163 events. 14/163 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 73 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 120. Up to 2 conditions per place. [2021-12-21 15:15:14,745 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 169 transitions, 386 flow [2021-12-21 15:15:14,749 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 146 transitions, 328 flow [2021-12-21 15:15:14,806 INFO L129 PetriNetUnfolder]: 14/145 cut-off events. [2021-12-21 15:15:14,809 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-12-21 15:15:14,810 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:15:14,810 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:15:14,811 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-12-21 15:15:14,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:15:14,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1565365569, now seen corresponding path program 1 times [2021-12-21 15:15:14,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:15:14,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047109007] [2021-12-21 15:15:14,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:15:14,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:15:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:15:15,038 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 15:15:15,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:15:15,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047109007] [2021-12-21 15:15:15,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047109007] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:15:15,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:15:15,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 15:15:15,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568649481] [2021-12-21 15:15:15,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:15:15,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 15:15:15,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:15:15,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 15:15:15,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 15:15:15,087 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 169 [2021-12-21 15:15:15,093 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 146 transitions, 328 flow. Second operand has 2 states, 2 states have (on average 154.5) internal successors, (309), 2 states have internal predecessors, (309), 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 15:15:15,093 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:15:15,093 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 169 [2021-12-21 15:15:15,095 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:15:15,162 INFO L129 PetriNetUnfolder]: 6/138 cut-off events. [2021-12-21 15:15:15,163 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2021-12-21 15:15:15,165 INFO L84 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 138 events. 6/138 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 38/168 useless extension candidates. Maximal degree in co-relation 119. Up to 13 conditions per place. [2021-12-21 15:15:15,167 INFO L132 encePairwiseOnDemand]: 161/169 looper letters, 12 selfloop transitions, 0 changer transitions 2/138 dead transitions. [2021-12-21 15:15:15,167 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 138 transitions, 336 flow [2021-12-21 15:15:15,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 15:15:15,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-21 15:15:15,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 316 transitions. [2021-12-21 15:15:15,182 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9349112426035503 [2021-12-21 15:15:15,186 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 316 transitions. [2021-12-21 15:15:15,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 316 transitions. [2021-12-21 15:15:15,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:15:15,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 316 transitions. [2021-12-21 15:15:15,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 158.0) internal successors, (316), 2 states have internal predecessors, (316), 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 15:15:15,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 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 15:15:15,210 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 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 15:15:15,211 INFO L186 Difference]: Start difference. First operand has 151 places, 146 transitions, 328 flow. Second operand 2 states and 316 transitions. [2021-12-21 15:15:15,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 138 transitions, 336 flow [2021-12-21 15:15:15,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 138 transitions, 312 flow, removed 0 selfloop flow, removed 12 redundant places. [2021-12-21 15:15:15,220 INFO L242 Difference]: Finished difference. Result has 140 places, 136 transitions, 284 flow [2021-12-21 15:15:15,221 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=284, PETRI_PLACES=140, PETRI_TRANSITIONS=136} [2021-12-21 15:15:15,224 INFO L334 CegarLoopForPetriNet]: 151 programPoint places, -11 predicate places. [2021-12-21 15:15:15,224 INFO L470 AbstractCegarLoop]: Abstraction has has 140 places, 136 transitions, 284 flow [2021-12-21 15:15:15,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 154.5) internal successors, (309), 2 states have internal predecessors, (309), 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 15:15:15,225 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:15:15,226 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:15:15,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 15:15:15,226 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-12-21 15:15:15,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:15:15,229 INFO L85 PathProgramCache]: Analyzing trace with hash -616084000, now seen corresponding path program 1 times [2021-12-21 15:15:15,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:15:15,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992791318] [2021-12-21 15:15:15,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:15:15,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:15:15,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:15:15,639 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 15:15:15,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:15:15,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992791318] [2021-12-21 15:15:15,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992791318] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:15:15,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:15:15,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 15:15:15,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384571325] [2021-12-21 15:15:15,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:15:15,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:15:15,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:15:15,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:15:15,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:15:15,644 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 169 [2021-12-21 15:15:15,644 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 136 transitions, 284 flow. Second operand has 7 states, 7 states have (on average 113.42857142857143) internal successors, (794), 7 states have internal predecessors, (794), 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 15:15:15,645 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:15:15,645 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 169 [2021-12-21 15:15:15,645 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:15:17,500 INFO L129 PetriNetUnfolder]: 13855/19795 cut-off events. [2021-12-21 15:15:17,500 INFO L130 PetriNetUnfolder]: For 728/910 co-relation queries the response was YES. [2021-12-21 15:15:17,541 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37315 conditions, 19795 events. 13855/19795 cut-off events. For 728/910 co-relation queries the response was YES. Maximal size of possible extension queue 1028. Compared 113714 event pairs, 8389 based on Foata normal form. 1/13760 useless extension candidates. Maximal degree in co-relation 37312. Up to 10952 conditions per place. [2021-12-21 15:15:17,632 INFO L132 encePairwiseOnDemand]: 157/169 looper letters, 69 selfloop transitions, 9 changer transitions 4/168 dead transitions. [2021-12-21 15:15:17,632 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 168 transitions, 523 flow [2021-12-21 15:15:17,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:15:17,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-21 15:15:17,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 839 transitions. [2021-12-21 15:15:17,636 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7092138630600169 [2021-12-21 15:15:17,636 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 839 transitions. [2021-12-21 15:15:17,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 839 transitions. [2021-12-21 15:15:17,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:15:17,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 839 transitions. [2021-12-21 15:15:17,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 119.85714285714286) internal successors, (839), 7 states have internal predecessors, (839), 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 15:15:17,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 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 15:15:17,642 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 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 15:15:17,642 INFO L186 Difference]: Start difference. First operand has 140 places, 136 transitions, 284 flow. Second operand 7 states and 839 transitions. [2021-12-21 15:15:17,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 168 transitions, 523 flow [2021-12-21 15:15:17,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 168 transitions, 523 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-21 15:15:17,649 INFO L242 Difference]: Finished difference. Result has 147 places, 142 transitions, 339 flow [2021-12-21 15:15:17,649 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=339, PETRI_PLACES=147, PETRI_TRANSITIONS=142} [2021-12-21 15:15:17,650 INFO L334 CegarLoopForPetriNet]: 151 programPoint places, -4 predicate places. [2021-12-21 15:15:17,650 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 142 transitions, 339 flow [2021-12-21 15:15:17,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 113.42857142857143) internal successors, (794), 7 states have internal predecessors, (794), 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 15:15:17,651 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:15:17,651 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:15:17,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 15:15:17,652 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-12-21 15:15:17,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:15:17,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1758121540, now seen corresponding path program 1 times [2021-12-21 15:15:17,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:15:17,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838310873] [2021-12-21 15:15:17,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:15:17,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:15:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:15:18,010 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 15:15:18,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:15:18,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838310873] [2021-12-21 15:15:18,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838310873] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:15:18,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:15:18,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 15:15:18,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075959829] [2021-12-21 15:15:18,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:15:18,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:15:18,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:15:18,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:15:18,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:15:18,015 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2021-12-21 15:15:18,016 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 142 transitions, 339 flow. Second operand has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 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 15:15:18,016 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:15:18,016 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2021-12-21 15:15:18,016 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:15:19,587 INFO L129 PetriNetUnfolder]: 13532/20062 cut-off events. [2021-12-21 15:15:19,587 INFO L130 PetriNetUnfolder]: For 4486/4730 co-relation queries the response was YES. [2021-12-21 15:15:19,639 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44924 conditions, 20062 events. 13532/20062 cut-off events. For 4486/4730 co-relation queries the response was YES. Maximal size of possible extension queue 965. Compared 124546 event pairs, 1500 based on Foata normal form. 2/14619 useless extension candidates. Maximal degree in co-relation 44917. Up to 10954 conditions per place. [2021-12-21 15:15:19,738 INFO L132 encePairwiseOnDemand]: 156/169 looper letters, 84 selfloop transitions, 17 changer transitions 1/186 dead transitions. [2021-12-21 15:15:19,738 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 186 transitions, 665 flow [2021-12-21 15:15:19,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 15:15:19,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-21 15:15:19,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 740 transitions. [2021-12-21 15:15:19,740 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7297830374753451 [2021-12-21 15:15:19,740 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 740 transitions. [2021-12-21 15:15:19,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 740 transitions. [2021-12-21 15:15:19,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:15:19,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 740 transitions. [2021-12-21 15:15:19,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 123.33333333333333) internal successors, (740), 6 states have internal predecessors, (740), 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 15:15:19,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 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 15:15:19,744 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 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 15:15:19,744 INFO L186 Difference]: Start difference. First operand has 147 places, 142 transitions, 339 flow. Second operand 6 states and 740 transitions. [2021-12-21 15:15:19,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 186 transitions, 665 flow [2021-12-21 15:15:19,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 186 transitions, 644 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-12-21 15:15:19,751 INFO L242 Difference]: Finished difference. Result has 147 places, 150 transitions, 411 flow [2021-12-21 15:15:19,751 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=411, PETRI_PLACES=147, PETRI_TRANSITIONS=150} [2021-12-21 15:15:19,751 INFO L334 CegarLoopForPetriNet]: 151 programPoint places, -4 predicate places. [2021-12-21 15:15:19,752 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 150 transitions, 411 flow [2021-12-21 15:15:19,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 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 15:15:19,752 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:15:19,752 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:15:19,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 15:15:19,753 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-12-21 15:15:19,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:15:19,753 INFO L85 PathProgramCache]: Analyzing trace with hash 793584122, now seen corresponding path program 2 times [2021-12-21 15:15:19,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:15:19,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695212883] [2021-12-21 15:15:19,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:15:19,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:15:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:15:19,866 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 15:15:19,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:15:19,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695212883] [2021-12-21 15:15:19,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695212883] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:15:19,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:15:19,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 15:15:19,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724431012] [2021-12-21 15:15:19,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:15:19,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:15:19,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:15:19,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:15:19,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:15:19,869 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 169 [2021-12-21 15:15:19,870 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 150 transitions, 411 flow. Second operand has 6 states, 6 states have (on average 123.66666666666667) internal successors, (742), 6 states have internal predecessors, (742), 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 15:15:19,870 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:15:19,870 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 169 [2021-12-21 15:15:19,870 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:15:22,339 INFO L129 PetriNetUnfolder]: 20952/31681 cut-off events. [2021-12-21 15:15:22,340 INFO L130 PetriNetUnfolder]: For 12684/12915 co-relation queries the response was YES. [2021-12-21 15:15:22,447 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69906 conditions, 31681 events. 20952/31681 cut-off events. For 12684/12915 co-relation queries the response was YES. Maximal size of possible extension queue 1730. Compared 220714 event pairs, 11477 based on Foata normal form. 634/24236 useless extension candidates. Maximal degree in co-relation 69899. Up to 6711 conditions per place. [2021-12-21 15:15:22,600 INFO L132 encePairwiseOnDemand]: 158/169 looper letters, 104 selfloop transitions, 15 changer transitions 0/223 dead transitions. [2021-12-21 15:15:22,600 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 223 transitions, 852 flow [2021-12-21 15:15:22,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:15:22,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-21 15:15:22,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 941 transitions. [2021-12-21 15:15:22,603 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7954353338968724 [2021-12-21 15:15:22,603 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 941 transitions. [2021-12-21 15:15:22,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 941 transitions. [2021-12-21 15:15:22,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:15:22,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 941 transitions. [2021-12-21 15:15:22,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 134.42857142857142) internal successors, (941), 7 states have internal predecessors, (941), 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 15:15:22,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 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 15:15:22,608 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 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 15:15:22,608 INFO L186 Difference]: Start difference. First operand has 147 places, 150 transitions, 411 flow. Second operand 7 states and 941 transitions. [2021-12-21 15:15:22,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 223 transitions, 852 flow [2021-12-21 15:15:22,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 223 transitions, 824 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-21 15:15:22,620 INFO L242 Difference]: Finished difference. Result has 153 places, 155 transitions, 472 flow [2021-12-21 15:15:22,620 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=472, PETRI_PLACES=153, PETRI_TRANSITIONS=155} [2021-12-21 15:15:22,621 INFO L334 CegarLoopForPetriNet]: 151 programPoint places, 2 predicate places. [2021-12-21 15:15:22,622 INFO L470 AbstractCegarLoop]: Abstraction has has 153 places, 155 transitions, 472 flow [2021-12-21 15:15:22,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 123.66666666666667) internal successors, (742), 6 states have internal predecessors, (742), 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 15:15:22,623 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:15:22,623 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:15:22,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 15:15:22,624 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-12-21 15:15:22,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:15:22,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1562844010, now seen corresponding path program 1 times [2021-12-21 15:15:22,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:15:22,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106136508] [2021-12-21 15:15:22,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:15:22,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:15:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:15:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:15:22,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:15:22,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106136508] [2021-12-21 15:15:22,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106136508] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:15:22,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428100296] [2021-12-21 15:15:22,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:15:22,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:15:22,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:15:22,780 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 15:15:22,781 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 15:15:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:15:22,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 15:15:22,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:15:23,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:15:23,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:15:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:15:23,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428100296] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:15:23,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:15:23,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-21 15:15:23,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027970790] [2021-12-21 15:15:23,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:15:23,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 15:15:23,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:15:23,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 15:15:23,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:15:23,885 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 169 [2021-12-21 15:15:23,886 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 155 transitions, 472 flow. Second operand has 10 states, 10 states have (on average 123.3) internal successors, (1233), 10 states have internal predecessors, (1233), 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 15:15:23,887 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:15:23,887 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 169 [2021-12-21 15:15:23,887 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:15:29,895 INFO L129 PetriNetUnfolder]: 50113/75128 cut-off events. [2021-12-21 15:15:29,895 INFO L130 PetriNetUnfolder]: For 80131/81542 co-relation queries the response was YES. [2021-12-21 15:15:30,183 INFO L84 FinitePrefix]: Finished finitePrefix Result has 191498 conditions, 75128 events. 50113/75128 cut-off events. For 80131/81542 co-relation queries the response was YES. Maximal size of possible extension queue 3698. Compared 589842 event pairs, 7598 based on Foata normal form. 1208/59792 useless extension candidates. Maximal degree in co-relation 191488. Up to 15354 conditions per place. [2021-12-21 15:15:30,577 INFO L132 encePairwiseOnDemand]: 156/169 looper letters, 167 selfloop transitions, 22 changer transitions 0/294 dead transitions. [2021-12-21 15:15:30,578 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 294 transitions, 1458 flow [2021-12-21 15:15:30,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 15:15:30,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-21 15:15:30,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1573 transitions. [2021-12-21 15:15:30,587 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7756410256410257 [2021-12-21 15:15:30,587 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1573 transitions. [2021-12-21 15:15:30,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1573 transitions. [2021-12-21 15:15:30,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:15:30,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1573 transitions. [2021-12-21 15:15:30,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 131.08333333333334) internal successors, (1573), 12 states have internal predecessors, (1573), 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 15:15:30,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 169.0) internal successors, (2197), 13 states have internal predecessors, (2197), 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 15:15:30,598 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 169.0) internal successors, (2197), 13 states have internal predecessors, (2197), 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 15:15:30,598 INFO L186 Difference]: Start difference. First operand has 153 places, 155 transitions, 472 flow. Second operand 12 states and 1573 transitions. [2021-12-21 15:15:30,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 294 transitions, 1458 flow [2021-12-21 15:15:30,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 294 transitions, 1440 flow, removed 7 selfloop flow, removed 2 redundant places. [2021-12-21 15:15:30,661 INFO L242 Difference]: Finished difference. Result has 169 places, 167 transitions, 604 flow [2021-12-21 15:15:30,662 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=604, PETRI_PLACES=169, PETRI_TRANSITIONS=167} [2021-12-21 15:15:30,662 INFO L334 CegarLoopForPetriNet]: 151 programPoint places, 18 predicate places. [2021-12-21 15:15:30,662 INFO L470 AbstractCegarLoop]: Abstraction has has 169 places, 167 transitions, 604 flow [2021-12-21 15:15:30,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 123.3) internal successors, (1233), 10 states have internal predecessors, (1233), 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 15:15:30,663 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:15:30,663 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:15:30,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 15:15:30,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:15:30,872 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-12-21 15:15:30,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:15:30,872 INFO L85 PathProgramCache]: Analyzing trace with hash 87096828, now seen corresponding path program 1 times [2021-12-21 15:15:30,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:15:30,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164910031] [2021-12-21 15:15:30,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:15:30,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:15:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:15:31,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:15:31,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:15:31,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164910031] [2021-12-21 15:15:31,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164910031] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:15:31,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151674348] [2021-12-21 15:15:31,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:15:31,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:15:31,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:15:31,140 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 15:15:31,175 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 15:15:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:15:31,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 15:15:31,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:15:31,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:15:31,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:15:32,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:15:32,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151674348] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:15:32,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:15:32,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2021-12-21 15:15:32,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901723739] [2021-12-21 15:15:32,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:15:32,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 15:15:32,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:15:32,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 15:15:32,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-21 15:15:32,141 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2021-12-21 15:15:32,142 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 167 transitions, 604 flow. Second operand has 14 states, 14 states have (on average 110.92857142857143) internal successors, (1553), 14 states have internal predecessors, (1553), 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 15:15:32,143 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:15:32,143 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2021-12-21 15:15:32,143 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:15:43,464 INFO L129 PetriNetUnfolder]: 81740/122202 cut-off events. [2021-12-21 15:15:43,464 INFO L130 PetriNetUnfolder]: For 252386/253211 co-relation queries the response was YES. [2021-12-21 15:15:44,095 INFO L84 FinitePrefix]: Finished finitePrefix Result has 381847 conditions, 122202 events. 81740/122202 cut-off events. For 252386/253211 co-relation queries the response was YES. Maximal size of possible extension queue 4957. Compared 975015 event pairs, 25887 based on Foata normal form. 1881/108125 useless extension candidates. Maximal degree in co-relation 381830. Up to 34691 conditions per place. [2021-12-21 15:15:44,965 INFO L132 encePairwiseOnDemand]: 152/169 looper letters, 290 selfloop transitions, 36 changer transitions 1/411 dead transitions. [2021-12-21 15:15:44,966 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 411 transitions, 2493 flow [2021-12-21 15:15:44,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 15:15:44,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-21 15:15:44,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1725 transitions. [2021-12-21 15:15:44,970 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7290786136939983 [2021-12-21 15:15:44,970 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1725 transitions. [2021-12-21 15:15:44,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1725 transitions. [2021-12-21 15:15:44,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:15:44,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1725 transitions. [2021-12-21 15:15:44,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 123.21428571428571) internal successors, (1725), 14 states have internal predecessors, (1725), 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 15:15:45,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 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 15:15:45,001 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 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 15:15:45,001 INFO L186 Difference]: Start difference. First operand has 169 places, 167 transitions, 604 flow. Second operand 14 states and 1725 transitions. [2021-12-21 15:15:45,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 411 transitions, 2493 flow [2021-12-21 15:15:45,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 411 transitions, 2487 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-21 15:15:45,680 INFO L242 Difference]: Finished difference. Result has 187 places, 183 transitions, 852 flow [2021-12-21 15:15:45,680 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=852, PETRI_PLACES=187, PETRI_TRANSITIONS=183} [2021-12-21 15:15:45,681 INFO L334 CegarLoopForPetriNet]: 151 programPoint places, 36 predicate places. [2021-12-21 15:15:45,681 INFO L470 AbstractCegarLoop]: Abstraction has has 187 places, 183 transitions, 852 flow [2021-12-21 15:15:45,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 110.92857142857143) internal successors, (1553), 14 states have internal predecessors, (1553), 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 15:15:45,682 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:15:45,682 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:15:45,700 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 15:15:45,888 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,SelfDestructingSolverStorable5 [2021-12-21 15:15:45,888 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-12-21 15:15:45,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:15:45,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1417117332, now seen corresponding path program 2 times [2021-12-21 15:15:45,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:15:45,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784154760] [2021-12-21 15:15:45,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:15:45,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:15:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:15:46,105 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 15:15:46,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:15:46,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784154760] [2021-12-21 15:15:46,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784154760] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:15:46,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:15:46,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 15:15:46,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394372120] [2021-12-21 15:15:46,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:15:46,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:15:46,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:15:46,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:15:46,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:15:46,107 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2021-12-21 15:15:46,108 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 183 transitions, 852 flow. Second operand has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 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 15:15:46,108 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:15:46,108 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2021-12-21 15:15:46,108 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand