./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/bench-exp2x4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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-exp2x4.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 f3514ef3a93910f9ac9453b24d3813c22e07d2a41de38e0bc0d58abd31257770 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 02:59:38,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 02:59:38,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 02:59:38,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 02:59:38,069 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 02:59:38,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 02:59:38,071 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 02:59:38,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 02:59:38,075 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 02:59:38,076 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 02:59:38,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 02:59:38,077 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 02:59:38,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 02:59:38,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 02:59:38,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 02:59:38,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 02:59:38,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 02:59:38,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 02:59:38,092 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 02:59:38,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 02:59:38,097 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 02:59:38,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 02:59:38,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 02:59:38,101 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 02:59:38,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 02:59:38,103 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 02:59:38,103 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 02:59:38,104 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 02:59:38,105 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 02:59:38,106 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 02:59:38,106 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 02:59:38,107 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 02:59:38,108 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 02:59:38,109 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 02:59:38,110 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 02:59:38,110 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 02:59:38,110 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 02:59:38,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 02:59:38,111 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 02:59:38,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 02:59:38,112 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 02:59:38,112 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 02:59:38,137 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 02:59:38,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 02:59:38,141 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 02:59:38,141 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 02:59:38,142 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 02:59:38,142 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 02:59:38,143 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 02:59:38,143 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 02:59:38,143 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 02:59:38,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 02:59:38,144 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 02:59:38,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 02:59:38,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 02:59:38,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 02:59:38,145 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 02:59:38,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 02:59:38,145 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 02:59:38,145 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 02:59:38,145 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 02:59:38,145 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 02:59:38,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 02:59:38,146 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 02:59:38,146 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 02:59:38,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 02:59:38,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:59:38,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 02:59:38,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 02:59:38,147 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 02:59:38,147 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 02:59:38,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 02:59:38,147 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 02:59:38,147 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 02:59:38,148 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 02:59:38,148 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 02:59:38,148 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3514ef3a93910f9ac9453b24d3813c22e07d2a41de38e0bc0d58abd31257770 [2021-12-16 02:59:38,342 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 02:59:38,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 02:59:38,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 02:59:38,365 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 02:59:38,371 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 02:59:38,373 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/bench-exp2x4.wvr.c [2021-12-16 02:59:38,431 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8e6cbd61/c3953bb832004120be36d653fe11087f/FLAGb80c90038 [2021-12-16 02:59:38,743 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 02:59:38,743 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp2x4.wvr.c [2021-12-16 02:59:38,753 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8e6cbd61/c3953bb832004120be36d653fe11087f/FLAGb80c90038 [2021-12-16 02:59:39,171 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8e6cbd61/c3953bb832004120be36d653fe11087f [2021-12-16 02:59:39,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 02:59:39,176 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 02:59:39,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 02:59:39,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 02:59:39,182 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 02:59:39,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:59:39" (1/1) ... [2021-12-16 02:59:39,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36fe2354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:59:39, skipping insertion in model container [2021-12-16 02:59:39,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:59:39" (1/1) ... [2021-12-16 02:59:39,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 02:59:39,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 02:59:39,369 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-exp2x4.wvr.c[2309,2322] [2021-12-16 02:59:39,377 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:59:39,388 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 02:59:39,420 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-exp2x4.wvr.c[2309,2322] [2021-12-16 02:59:39,422 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:59:39,432 INFO L208 MainTranslator]: Completed translation [2021-12-16 02:59:39,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:59:39 WrapperNode [2021-12-16 02:59:39,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 02:59:39,433 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 02:59:39,433 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 02:59:39,433 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 02:59:39,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:59:39" (1/1) ... [2021-12-16 02:59:39,452 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:59:39" (1/1) ... [2021-12-16 02:59:39,472 INFO L137 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2021-12-16 02:59:39,473 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 02:59:39,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 02:59:39,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 02:59:39,474 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 02:59:39,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:59:39" (1/1) ... [2021-12-16 02:59:39,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:59:39" (1/1) ... [2021-12-16 02:59:39,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:59:39" (1/1) ... [2021-12-16 02:59:39,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:59:39" (1/1) ... [2021-12-16 02:59:39,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:59:39" (1/1) ... [2021-12-16 02:59:39,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:59:39" (1/1) ... [2021-12-16 02:59:39,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:59:39" (1/1) ... [2021-12-16 02:59:39,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 02:59:39,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 02:59:39,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 02:59:39,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 02:59:39,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:59:39" (1/1) ... [2021-12-16 02:59:39,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:59:39,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:59:39,530 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) [2021-12-16 02:59:39,540 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 [2021-12-16 02:59:39,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 02:59:39,558 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-16 02:59:39,558 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-16 02:59:39,559 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-16 02:59:39,559 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-16 02:59:39,559 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-16 02:59:39,559 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-16 02:59:39,559 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-12-16 02:59:39,560 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-12-16 02:59:39,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 02:59:39,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 02:59:39,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 02:59:39,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 02:59:39,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 02:59:39,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 02:59:39,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 02:59:39,562 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-16 02:59:39,615 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 02:59:39,616 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 02:59:39,743 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 02:59:39,749 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 02:59:39,749 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-16 02:59:39,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:59:39 BoogieIcfgContainer [2021-12-16 02:59:39,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 02:59:39,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 02:59:39,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 02:59:39,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 02:59:39,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 02:59:39" (1/3) ... [2021-12-16 02:59:39,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75cfd3d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:59:39, skipping insertion in model container [2021-12-16 02:59:39,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:59:39" (2/3) ... [2021-12-16 02:59:39,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75cfd3d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:59:39, skipping insertion in model container [2021-12-16 02:59:39,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:59:39" (3/3) ... [2021-12-16 02:59:39,757 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp2x4.wvr.c [2021-12-16 02:59:39,760 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-16 02:59:39,760 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 02:59:39,760 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 02:59:39,761 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-16 02:59:39,785 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:59:39,785 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:59:39,785 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:59:39,785 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:59:39,786 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:59:39,786 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:59:39,786 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:59:39,787 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:59:39,787 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:59:39,787 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:59:39,788 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:59:39,788 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:59:39,788 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:59:39,788 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:59:39,789 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:59:39,789 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:59:39,794 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:59:39,795 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:59:39,796 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:59:39,797 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:59:39,797 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:59:39,798 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:59:39,798 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:59:39,799 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:59:39,802 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-12-16 02:59:39,839 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 02:59:39,844 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 [2021-12-16 02:59:39,844 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-12-16 02:59:39,854 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 132 places, 129 transitions, 290 flow [2021-12-16 02:59:39,895 INFO L129 PetriNetUnfolder]: 10/125 cut-off events. [2021-12-16 02:59:39,895 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-16 02:59:39,899 INFO L84 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 125 events. 10/125 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 64 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2021-12-16 02:59:39,899 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 129 transitions, 290 flow [2021-12-16 02:59:39,903 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 112 transitions, 248 flow [2021-12-16 02:59:39,944 INFO L129 PetriNetUnfolder]: 10/111 cut-off events. [2021-12-16 02:59:39,944 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-16 02:59:39,944 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:59:39,945 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] [2021-12-16 02:59:39,945 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-16 02:59:39,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:59:39,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1320447835, now seen corresponding path program 1 times [2021-12-16 02:59:39,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:59:39,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148885468] [2021-12-16 02:59:39,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:59:39,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:59:40,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:59:40,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:59:40,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:59:40,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148885468] [2021-12-16 02:59:40,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148885468] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:59:40,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:59:40,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 02:59:40,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640836983] [2021-12-16 02:59:40,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:59:40,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 02:59:40,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:59:40,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 02:59:40,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 02:59:40,175 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 129 [2021-12-16 02:59:40,180 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 112 transitions, 248 flow. Second operand has 2 states, 2 states have (on average 119.5) internal successors, (239), 2 states have internal predecessors, (239), 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) [2021-12-16 02:59:40,180 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:59:40,180 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 129 [2021-12-16 02:59:40,181 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:59:40,223 INFO L129 PetriNetUnfolder]: 4/106 cut-off events. [2021-12-16 02:59:40,224 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-12-16 02:59:40,225 INFO L84 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 106 events. 4/106 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 18/118 useless extension candidates. Maximal degree in co-relation 86. Up to 9 conditions per place. [2021-12-16 02:59:40,226 INFO L132 encePairwiseOnDemand]: 123/129 looper letters, 8 selfloop transitions, 0 changer transitions 2/106 dead transitions. [2021-12-16 02:59:40,226 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 106 transitions, 252 flow [2021-12-16 02:59:40,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 02:59:40,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-16 02:59:40,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 242 transitions. [2021-12-16 02:59:40,242 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.937984496124031 [2021-12-16 02:59:40,243 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 242 transitions. [2021-12-16 02:59:40,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 242 transitions. [2021-12-16 02:59:40,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:59:40,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 242 transitions. [2021-12-16 02:59:40,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 121.0) internal successors, (242), 2 states have internal predecessors, (242), 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) [2021-12-16 02:59:40,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 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) [2021-12-16 02:59:40,255 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 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) [2021-12-16 02:59:40,256 INFO L186 Difference]: Start difference. First operand has 115 places, 112 transitions, 248 flow. Second operand 2 states and 242 transitions. [2021-12-16 02:59:40,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 106 transitions, 252 flow [2021-12-16 02:59:40,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 106 transitions, 236 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-12-16 02:59:40,264 INFO L242 Difference]: Finished difference. Result has 108 places, 104 transitions, 216 flow [2021-12-16 02:59:40,265 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=216, PETRI_PLACES=108, PETRI_TRANSITIONS=104} [2021-12-16 02:59:40,268 INFO L334 CegarLoopForPetriNet]: 115 programPoint places, -7 predicate places. [2021-12-16 02:59:40,269 INFO L470 AbstractCegarLoop]: Abstraction has has 108 places, 104 transitions, 216 flow [2021-12-16 02:59:40,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 119.5) internal successors, (239), 2 states have internal predecessors, (239), 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) [2021-12-16 02:59:40,269 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:59:40,269 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] [2021-12-16 02:59:40,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 02:59:40,270 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-16 02:59:40,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:59:40,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1027447866, now seen corresponding path program 1 times [2021-12-16 02:59:40,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:59:40,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367886759] [2021-12-16 02:59:40,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:59:40,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:59:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:59:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:59:40,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:59:40,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367886759] [2021-12-16 02:59:40,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367886759] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:59:40,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:59:40,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:59:40,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714195317] [2021-12-16 02:59:40,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:59:40,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:59:40,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:59:40,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:59:40,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:59:40,672 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 129 [2021-12-16 02:59:40,673 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 104 transitions, 216 flow. Second operand has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 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) [2021-12-16 02:59:40,673 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:59:40,673 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 129 [2021-12-16 02:59:40,673 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:59:41,134 INFO L129 PetriNetUnfolder]: 1672/2858 cut-off events. [2021-12-16 02:59:41,135 INFO L130 PetriNetUnfolder]: For 125/177 co-relation queries the response was YES. [2021-12-16 02:59:41,142 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5261 conditions, 2858 events. 1672/2858 cut-off events. For 125/177 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 15534 event pairs, 727 based on Foata normal form. 1/2129 useless extension candidates. Maximal degree in co-relation 5258. Up to 1838 conditions per place. [2021-12-16 02:59:41,158 INFO L132 encePairwiseOnDemand]: 119/129 looper letters, 51 selfloop transitions, 7 changer transitions 4/126 dead transitions. [2021-12-16 02:59:41,158 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 126 transitions, 391 flow [2021-12-16 02:59:41,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:59:41,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 02:59:41,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 623 transitions. [2021-12-16 02:59:41,165 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.689922480620155 [2021-12-16 02:59:41,165 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 623 transitions. [2021-12-16 02:59:41,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 623 transitions. [2021-12-16 02:59:41,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:59:41,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 623 transitions. [2021-12-16 02:59:41,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 89.0) internal successors, (623), 7 states have internal predecessors, (623), 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) [2021-12-16 02:59:41,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 129.0) internal successors, (1032), 8 states have internal predecessors, (1032), 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) [2021-12-16 02:59:41,172 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 129.0) internal successors, (1032), 8 states have internal predecessors, (1032), 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) [2021-12-16 02:59:41,172 INFO L186 Difference]: Start difference. First operand has 108 places, 104 transitions, 216 flow. Second operand 7 states and 623 transitions. [2021-12-16 02:59:41,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 126 transitions, 391 flow [2021-12-16 02:59:41,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 126 transitions, 391 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-16 02:59:41,176 INFO L242 Difference]: Finished difference. Result has 115 places, 108 transitions, 257 flow [2021-12-16 02:59:41,177 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=257, PETRI_PLACES=115, PETRI_TRANSITIONS=108} [2021-12-16 02:59:41,178 INFO L334 CegarLoopForPetriNet]: 115 programPoint places, 0 predicate places. [2021-12-16 02:59:41,178 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 108 transitions, 257 flow [2021-12-16 02:59:41,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 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) [2021-12-16 02:59:41,178 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:59:41,179 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] [2021-12-16 02:59:41,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 02:59:41,180 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-16 02:59:41,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:59:41,181 INFO L85 PathProgramCache]: Analyzing trace with hash 2095688119, now seen corresponding path program 1 times [2021-12-16 02:59:41,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:59:41,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366796002] [2021-12-16 02:59:41,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:59:41,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:59:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:59:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:59:41,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:59:41,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366796002] [2021-12-16 02:59:41,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366796002] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:59:41,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:59:41,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:59:41,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896695627] [2021-12-16 02:59:41,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:59:41,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:59:41,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:59:41,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:59:41,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:59:41,532 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 129 [2021-12-16 02:59:41,533 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 108 transitions, 257 flow. Second operand has 6 states, 6 states have (on average 83.5) internal successors, (501), 6 states have internal predecessors, (501), 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) [2021-12-16 02:59:41,533 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:59:41,533 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 129 [2021-12-16 02:59:41,534 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:59:41,883 INFO L129 PetriNetUnfolder]: 1645/2775 cut-off events. [2021-12-16 02:59:41,883 INFO L130 PetriNetUnfolder]: For 410/472 co-relation queries the response was YES. [2021-12-16 02:59:41,887 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5882 conditions, 2775 events. 1645/2775 cut-off events. For 410/472 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 15426 event pairs, 251 based on Foata normal form. 0/2123 useless extension candidates. Maximal degree in co-relation 5875. Up to 1840 conditions per place. [2021-12-16 02:59:41,900 INFO L132 encePairwiseOnDemand]: 118/129 looper letters, 60 selfloop transitions, 13 changer transitions 1/136 dead transitions. [2021-12-16 02:59:41,900 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 136 transitions, 483 flow [2021-12-16 02:59:41,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 02:59:41,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-16 02:59:41,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 544 transitions. [2021-12-16 02:59:41,902 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7028423772609819 [2021-12-16 02:59:41,902 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 544 transitions. [2021-12-16 02:59:41,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 544 transitions. [2021-12-16 02:59:41,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:59:41,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 544 transitions. [2021-12-16 02:59:41,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 90.66666666666667) internal successors, (544), 6 states have internal predecessors, (544), 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) [2021-12-16 02:59:41,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 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) [2021-12-16 02:59:41,906 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 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) [2021-12-16 02:59:41,906 INFO L186 Difference]: Start difference. First operand has 115 places, 108 transitions, 257 flow. Second operand 6 states and 544 transitions. [2021-12-16 02:59:41,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 136 transitions, 483 flow [2021-12-16 02:59:41,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 136 transitions, 466 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-12-16 02:59:41,912 INFO L242 Difference]: Finished difference. Result has 115 places, 114 transitions, 311 flow [2021-12-16 02:59:41,913 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=311, PETRI_PLACES=115, PETRI_TRANSITIONS=114} [2021-12-16 02:59:41,915 INFO L334 CegarLoopForPetriNet]: 115 programPoint places, 0 predicate places. [2021-12-16 02:59:41,915 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 114 transitions, 311 flow [2021-12-16 02:59:41,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.5) internal successors, (501), 6 states have internal predecessors, (501), 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) [2021-12-16 02:59:41,915 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:59:41,915 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] [2021-12-16 02:59:41,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 02:59:41,916 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-16 02:59:41,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:59:41,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1439782455, now seen corresponding path program 2 times [2021-12-16 02:59:41,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:59:41,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964050133] [2021-12-16 02:59:41,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:59:41,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:59:41,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:59:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:59:42,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:59:42,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964050133] [2021-12-16 02:59:42,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964050133] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:59:42,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:59:42,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:59:42,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758768578] [2021-12-16 02:59:42,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:59:42,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:59:42,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:59:42,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:59:42,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:59:42,047 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 129 [2021-12-16 02:59:42,048 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 114 transitions, 311 flow. Second operand has 6 states, 6 states have (on average 90.83333333333333) internal successors, (545), 6 states have internal predecessors, (545), 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) [2021-12-16 02:59:42,051 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:59:42,051 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 129 [2021-12-16 02:59:42,052 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:59:42,433 INFO L129 PetriNetUnfolder]: 2104/3805 cut-off events. [2021-12-16 02:59:42,433 INFO L130 PetriNetUnfolder]: For 1077/1140 co-relation queries the response was YES. [2021-12-16 02:59:42,446 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8488 conditions, 3805 events. 2104/3805 cut-off events. For 1077/1140 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 24765 event pairs, 353 based on Foata normal form. 112/3258 useless extension candidates. Maximal degree in co-relation 8481. Up to 1165 conditions per place. [2021-12-16 02:59:42,467 INFO L132 encePairwiseOnDemand]: 118/129 looper letters, 73 selfloop transitions, 15 changer transitions 0/162 dead transitions. [2021-12-16 02:59:42,468 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 162 transitions, 626 flow [2021-12-16 02:59:42,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:59:42,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 02:59:42,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 686 transitions. [2021-12-16 02:59:42,470 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7596899224806202 [2021-12-16 02:59:42,470 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 686 transitions. [2021-12-16 02:59:42,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 686 transitions. [2021-12-16 02:59:42,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:59:42,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 686 transitions. [2021-12-16 02:59:42,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.0) internal successors, (686), 7 states have internal predecessors, (686), 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) [2021-12-16 02:59:42,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 129.0) internal successors, (1032), 8 states have internal predecessors, (1032), 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) [2021-12-16 02:59:42,474 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 129.0) internal successors, (1032), 8 states have internal predecessors, (1032), 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) [2021-12-16 02:59:42,474 INFO L186 Difference]: Start difference. First operand has 115 places, 114 transitions, 311 flow. Second operand 7 states and 686 transitions. [2021-12-16 02:59:42,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 162 transitions, 626 flow [2021-12-16 02:59:42,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 162 transitions, 606 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-16 02:59:42,482 INFO L242 Difference]: Finished difference. Result has 121 places, 119 transitions, 380 flow [2021-12-16 02:59:42,483 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=380, PETRI_PLACES=121, PETRI_TRANSITIONS=119} [2021-12-16 02:59:42,484 INFO L334 CegarLoopForPetriNet]: 115 programPoint places, 6 predicate places. [2021-12-16 02:59:42,484 INFO L470 AbstractCegarLoop]: Abstraction has has 121 places, 119 transitions, 380 flow [2021-12-16 02:59:42,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 90.83333333333333) internal successors, (545), 6 states have internal predecessors, (545), 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) [2021-12-16 02:59:42,484 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:59:42,485 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] [2021-12-16 02:59:42,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 02:59:42,485 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-16 02:59:42,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:59:42,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1910230498, now seen corresponding path program 1 times [2021-12-16 02:59:42,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:59:42,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905023446] [2021-12-16 02:59:42,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:59:42,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:59:42,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:59:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:59:42,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:59:42,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905023446] [2021-12-16 02:59:42,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905023446] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:59:42,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837667348] [2021-12-16 02:59:42,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:59:42,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:59:42,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:59:42,625 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) [2021-12-16 02:59:42,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 02:59:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:59:42,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 02:59:42,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:00:03,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:00:03,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:00:04,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:00:04,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837667348] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:00:04,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:00:04,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-16 03:00:04,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477557775] [2021-12-16 03:00:04,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:00:04,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 03:00:04,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:00:04,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 03:00:04,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-16 03:00:04,224 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 129 [2021-12-16 03:00:04,225 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 119 transitions, 380 flow. Second operand has 10 states, 10 states have (on average 90.3) internal successors, (903), 10 states have internal predecessors, (903), 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) [2021-12-16 03:00:04,225 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:00:04,225 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 129 [2021-12-16 03:00:04,225 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:00:05,124 INFO L129 PetriNetUnfolder]: 3691/6731 cut-off events. [2021-12-16 03:00:05,125 INFO L130 PetriNetUnfolder]: For 10371/10874 co-relation queries the response was YES. [2021-12-16 03:00:05,145 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18935 conditions, 6731 events. 3691/6731 cut-off events. For 10371/10874 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 50208 event pairs, 575 based on Foata normal form. 126/5817 useless extension candidates. Maximal degree in co-relation 18925. Up to 2146 conditions per place. [2021-12-16 03:00:05,181 INFO L132 encePairwiseOnDemand]: 116/129 looper letters, 127 selfloop transitions, 22 changer transitions 0/224 dead transitions. [2021-12-16 03:00:05,181 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 224 transitions, 1206 flow [2021-12-16 03:00:05,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 03:00:05,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-16 03:00:05,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1149 transitions. [2021-12-16 03:00:05,185 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7422480620155039 [2021-12-16 03:00:05,185 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1149 transitions. [2021-12-16 03:00:05,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1149 transitions. [2021-12-16 03:00:05,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:00:05,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1149 transitions. [2021-12-16 03:00:05,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 95.75) internal successors, (1149), 12 states have internal predecessors, (1149), 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) [2021-12-16 03:00:05,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 129.0) internal successors, (1677), 13 states have internal predecessors, (1677), 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) [2021-12-16 03:00:05,191 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 129.0) internal successors, (1677), 13 states have internal predecessors, (1677), 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) [2021-12-16 03:00:05,192 INFO L186 Difference]: Start difference. First operand has 121 places, 119 transitions, 380 flow. Second operand 12 states and 1149 transitions. [2021-12-16 03:00:05,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 224 transitions, 1206 flow [2021-12-16 03:00:05,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 224 transitions, 1188 flow, removed 7 selfloop flow, removed 2 redundant places. [2021-12-16 03:00:05,204 INFO L242 Difference]: Finished difference. Result has 137 places, 131 transitions, 512 flow [2021-12-16 03:00:05,205 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=512, PETRI_PLACES=137, PETRI_TRANSITIONS=131} [2021-12-16 03:00:05,206 INFO L334 CegarLoopForPetriNet]: 115 programPoint places, 22 predicate places. [2021-12-16 03:00:05,207 INFO L470 AbstractCegarLoop]: Abstraction has has 137 places, 131 transitions, 512 flow [2021-12-16 03:00:05,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 90.3) internal successors, (903), 10 states have internal predecessors, (903), 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) [2021-12-16 03:00:05,207 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:00:05,207 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] [2021-12-16 03:00:05,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 03:00:05,423 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 [2021-12-16 03:00:05,424 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-16 03:00:05,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:00:05,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1772304990, now seen corresponding path program 1 times [2021-12-16 03:00:05,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:00:05,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096519242] [2021-12-16 03:00:05,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:00:05,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:00:05,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:00:05,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:00:05,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:00:05,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096519242] [2021-12-16 03:00:05,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096519242] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:00:05,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585064355] [2021-12-16 03:00:05,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:00:05,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:00:05,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:00:05,519 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) [2021-12-16 03:00:05,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 03:00:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:00:05,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 03:00:05,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:00:07,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:00:07,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:00:07,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:00:07,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585064355] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:00:07,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:00:07,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-16 03:00:07,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761512159] [2021-12-16 03:00:07,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:00:07,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 03:00:07,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:00:07,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 03:00:07,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-16 03:00:07,778 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 129 [2021-12-16 03:00:07,779 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 131 transitions, 512 flow. Second operand has 10 states, 10 states have (on average 90.7) internal successors, (907), 10 states have internal predecessors, (907), 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) [2021-12-16 03:00:07,779 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:00:07,780 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 129 [2021-12-16 03:00:07,780 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:00:08,800 INFO L129 PetriNetUnfolder]: 4854/9066 cut-off events. [2021-12-16 03:00:08,800 INFO L130 PetriNetUnfolder]: For 18104/18220 co-relation queries the response was YES. [2021-12-16 03:00:08,843 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29781 conditions, 9066 events. 4854/9066 cut-off events. For 18104/18220 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 73342 event pairs, 636 based on Foata normal form. 275/9034 useless extension candidates. Maximal degree in co-relation 29764. Up to 2918 conditions per place. [2021-12-16 03:00:08,895 INFO L132 encePairwiseOnDemand]: 116/129 looper letters, 134 selfloop transitions, 20 changer transitions 0/233 dead transitions. [2021-12-16 03:00:08,895 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 233 transitions, 1361 flow [2021-12-16 03:00:08,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 03:00:08,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-16 03:00:08,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1144 transitions. [2021-12-16 03:00:08,898 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7390180878552972 [2021-12-16 03:00:08,898 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1144 transitions. [2021-12-16 03:00:08,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1144 transitions. [2021-12-16 03:00:08,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:00:08,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1144 transitions. [2021-12-16 03:00:08,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 95.33333333333333) internal successors, (1144), 12 states have internal predecessors, (1144), 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) [2021-12-16 03:00:08,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 129.0) internal successors, (1677), 13 states have internal predecessors, (1677), 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) [2021-12-16 03:00:08,903 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 129.0) internal successors, (1677), 13 states have internal predecessors, (1677), 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) [2021-12-16 03:00:08,903 INFO L186 Difference]: Start difference. First operand has 137 places, 131 transitions, 512 flow. Second operand 12 states and 1144 transitions. [2021-12-16 03:00:08,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 233 transitions, 1361 flow [2021-12-16 03:00:08,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 233 transitions, 1355 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-16 03:00:08,928 INFO L242 Difference]: Finished difference. Result has 152 places, 139 transitions, 647 flow [2021-12-16 03:00:08,928 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=647, PETRI_PLACES=152, PETRI_TRANSITIONS=139} [2021-12-16 03:00:08,930 INFO L334 CegarLoopForPetriNet]: 115 programPoint places, 37 predicate places. [2021-12-16 03:00:08,930 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 139 transitions, 647 flow [2021-12-16 03:00:08,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 90.7) internal successors, (907), 10 states have internal predecessors, (907), 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) [2021-12-16 03:00:08,931 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:00:08,931 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] [2021-12-16 03:00:08,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 03:00:09,147 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 [2021-12-16 03:00:09,147 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-16 03:00:09,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:00:09,148 INFO L85 PathProgramCache]: Analyzing trace with hash -788313852, now seen corresponding path program 2 times [2021-12-16 03:00:09,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:00:09,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67177463] [2021-12-16 03:00:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:00:09,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:00:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:00:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:00:09,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:00:09,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67177463] [2021-12-16 03:00:09,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67177463] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:00:09,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:00:09,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:00:09,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113483214] [2021-12-16 03:00:09,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:00:09,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:00:09,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:00:09,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:00:09,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:00:09,244 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 129 [2021-12-16 03:00:09,244 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 139 transitions, 647 flow. Second operand has 6 states, 6 states have (on average 90.83333333333333) internal successors, (545), 6 states have internal predecessors, (545), 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) [2021-12-16 03:00:09,245 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:00:09,245 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 129 [2021-12-16 03:00:09,245 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:00:09,956 INFO L129 PetriNetUnfolder]: 4018/7702 cut-off events. [2021-12-16 03:00:09,957 INFO L130 PetriNetUnfolder]: For 27191/27650 co-relation queries the response was YES. [2021-12-16 03:00:09,992 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28742 conditions, 7702 events. 4018/7702 cut-off events. For 27191/27650 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 60046 event pairs, 1132 based on Foata normal form. 180/7475 useless extension candidates. Maximal degree in co-relation 28718. Up to 2350 conditions per place. [2021-12-16 03:00:10,029 INFO L132 encePairwiseOnDemand]: 117/129 looper letters, 103 selfloop transitions, 24 changer transitions 0/205 dead transitions. [2021-12-16 03:00:10,029 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 205 transitions, 1413 flow [2021-12-16 03:00:10,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:00:10,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:00:10,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 680 transitions. [2021-12-16 03:00:10,031 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7530454042081949 [2021-12-16 03:00:10,031 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 680 transitions. [2021-12-16 03:00:10,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 680 transitions. [2021-12-16 03:00:10,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:00:10,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 680 transitions. [2021-12-16 03:00:10,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.14285714285714) internal successors, (680), 7 states have internal predecessors, (680), 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) [2021-12-16 03:00:10,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 129.0) internal successors, (1032), 8 states have internal predecessors, (1032), 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) [2021-12-16 03:00:10,035 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 129.0) internal successors, (1032), 8 states have internal predecessors, (1032), 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) [2021-12-16 03:00:10,035 INFO L186 Difference]: Start difference. First operand has 152 places, 139 transitions, 647 flow. Second operand 7 states and 680 transitions. [2021-12-16 03:00:10,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 205 transitions, 1413 flow [2021-12-16 03:00:10,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 205 transitions, 1354 flow, removed 21 selfloop flow, removed 4 redundant places. [2021-12-16 03:00:10,083 INFO L242 Difference]: Finished difference. Result has 157 places, 149 transitions, 790 flow [2021-12-16 03:00:10,083 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=790, PETRI_PLACES=157, PETRI_TRANSITIONS=149} [2021-12-16 03:00:10,084 INFO L334 CegarLoopForPetriNet]: 115 programPoint places, 42 predicate places. [2021-12-16 03:00:10,084 INFO L470 AbstractCegarLoop]: Abstraction has has 157 places, 149 transitions, 790 flow [2021-12-16 03:00:10,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 90.83333333333333) internal successors, (545), 6 states have internal predecessors, (545), 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) [2021-12-16 03:00:10,084 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:00:10,085 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] [2021-12-16 03:00:10,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 03:00:10,085 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-16 03:00:10,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:00:10,085 INFO L85 PathProgramCache]: Analyzing trace with hash 2096950625, now seen corresponding path program 1 times [2021-12-16 03:00:10,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:00:10,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972539967] [2021-12-16 03:00:10,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:00:10,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:00:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:00:10,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:00:10,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:00:10,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972539967] [2021-12-16 03:00:10,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972539967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:00:10,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:00:10,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:00:10,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928560817] [2021-12-16 03:00:10,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:00:10,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:00:10,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:00:10,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:00:10,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:00:10,167 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 129 [2021-12-16 03:00:10,168 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 149 transitions, 790 flow. Second operand has 6 states, 6 states have (on average 90.83333333333333) internal successors, (545), 6 states have internal predecessors, (545), 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) [2021-12-16 03:00:10,168 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:00:10,168 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 129 [2021-12-16 03:00:10,168 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:00:11,009 INFO L129 PetriNetUnfolder]: 4012/7585 cut-off events. [2021-12-16 03:00:11,009 INFO L130 PetriNetUnfolder]: For 29985/30183 co-relation queries the response was YES. [2021-12-16 03:00:11,042 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29834 conditions, 7585 events. 4012/7585 cut-off events. For 29985/30183 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 58027 event pairs, 1571 based on Foata normal form. 58/7307 useless extension candidates. Maximal degree in co-relation 29806. Up to 3466 conditions per place. [2021-12-16 03:00:11,078 INFO L132 encePairwiseOnDemand]: 116/129 looper letters, 106 selfloop transitions, 18 changer transitions 2/204 dead transitions. [2021-12-16 03:00:11,079 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 204 transitions, 1425 flow [2021-12-16 03:00:11,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:00:11,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:00:11,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 679 transitions. [2021-12-16 03:00:11,081 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.751937984496124 [2021-12-16 03:00:11,081 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 679 transitions. [2021-12-16 03:00:11,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 679 transitions. [2021-12-16 03:00:11,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:00:11,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 679 transitions. [2021-12-16 03:00:11,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 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) [2021-12-16 03:00:11,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 129.0) internal successors, (1032), 8 states have internal predecessors, (1032), 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) [2021-12-16 03:00:11,084 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 129.0) internal successors, (1032), 8 states have internal predecessors, (1032), 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) [2021-12-16 03:00:11,084 INFO L186 Difference]: Start difference. First operand has 157 places, 149 transitions, 790 flow. Second operand 7 states and 679 transitions. [2021-12-16 03:00:11,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 204 transitions, 1425 flow [2021-12-16 03:00:11,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 204 transitions, 1413 flow, removed 4 selfloop flow, removed 2 redundant places. [2021-12-16 03:00:11,212 INFO L242 Difference]: Finished difference. Result has 164 places, 149 transitions, 825 flow [2021-12-16 03:00:11,212 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=825, PETRI_PLACES=164, PETRI_TRANSITIONS=149} [2021-12-16 03:00:11,214 INFO L334 CegarLoopForPetriNet]: 115 programPoint places, 49 predicate places. [2021-12-16 03:00:11,214 INFO L470 AbstractCegarLoop]: Abstraction has has 164 places, 149 transitions, 825 flow [2021-12-16 03:00:11,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 90.83333333333333) internal successors, (545), 6 states have internal predecessors, (545), 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) [2021-12-16 03:00:11,215 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:00:11,215 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] [2021-12-16 03:00:11,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 03:00:11,215 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-16 03:00:11,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:00:11,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1986692643, now seen corresponding path program 2 times [2021-12-16 03:00:11,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:00:11,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207770031] [2021-12-16 03:00:11,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:00:11,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:00:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:00:11,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:00:11,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:00:11,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207770031] [2021-12-16 03:00:11,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207770031] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:00:11,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:00:11,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 03:00:11,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193159751] [2021-12-16 03:00:11,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:00:11,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 03:00:11,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:00:11,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 03:00:11,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-16 03:00:11,348 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 129 [2021-12-16 03:00:11,349 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 149 transitions, 825 flow. Second operand has 7 states, 7 states have (on average 82.71428571428571) internal successors, (579), 7 states have internal predecessors, (579), 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) [2021-12-16 03:00:11,349 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:00:11,349 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 129 [2021-12-16 03:00:11,349 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:00:12,511 INFO L129 PetriNetUnfolder]: 6858/11444 cut-off events. [2021-12-16 03:00:12,511 INFO L130 PetriNetUnfolder]: For 54698/54722 co-relation queries the response was YES. [2021-12-16 03:00:12,567 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48114 conditions, 11444 events. 6858/11444 cut-off events. For 54698/54722 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 81211 event pairs, 2777 based on Foata normal form. 220/11405 useless extension candidates. Maximal degree in co-relation 48083. Up to 6658 conditions per place. [2021-12-16 03:00:12,632 INFO L132 encePairwiseOnDemand]: 119/129 looper letters, 133 selfloop transitions, 19 changer transitions 2/216 dead transitions. [2021-12-16 03:00:12,632 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 216 transitions, 1670 flow [2021-12-16 03:00:12,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:00:12,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:00:12,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 635 transitions. [2021-12-16 03:00:12,638 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7032115171650055 [2021-12-16 03:00:12,639 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 635 transitions. [2021-12-16 03:00:12,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 635 transitions. [2021-12-16 03:00:12,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:00:12,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 635 transitions. [2021-12-16 03:00:12,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.71428571428571) internal successors, (635), 7 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:00:12,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 129.0) internal successors, (1032), 8 states have internal predecessors, (1032), 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) [2021-12-16 03:00:12,643 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 129.0) internal successors, (1032), 8 states have internal predecessors, (1032), 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) [2021-12-16 03:00:12,643 INFO L186 Difference]: Start difference. First operand has 164 places, 149 transitions, 825 flow. Second operand 7 states and 635 transitions. [2021-12-16 03:00:12,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 216 transitions, 1670 flow [2021-12-16 03:00:12,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 216 transitions, 1662 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-12-16 03:00:12,746 INFO L242 Difference]: Finished difference. Result has 171 places, 155 transitions, 949 flow [2021-12-16 03:00:12,747 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=949, PETRI_PLACES=171, PETRI_TRANSITIONS=155} [2021-12-16 03:00:12,747 INFO L334 CegarLoopForPetriNet]: 115 programPoint places, 56 predicate places. [2021-12-16 03:00:12,748 INFO L470 AbstractCegarLoop]: Abstraction has has 171 places, 155 transitions, 949 flow [2021-12-16 03:00:12,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 82.71428571428571) internal successors, (579), 7 states have internal predecessors, (579), 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) [2021-12-16 03:00:12,748 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:00:12,748 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] [2021-12-16 03:00:12,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 03:00:12,749 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-16 03:00:12,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:00:12,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1751536393, now seen corresponding path program 1 times [2021-12-16 03:00:12,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:00:12,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102954784] [2021-12-16 03:00:12,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:00:12,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:00:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:00:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:00:15,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:00:15,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102954784] [2021-12-16 03:00:15,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102954784] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:00:15,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712537292] [2021-12-16 03:00:15,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:00:15,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:00:15,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:00:15,213 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:00:15,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 03:00:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:00:17,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-16 03:00:17,808 INFO L286 TraceCheckSpWp]: Computing forward predicates...