./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/fib_safe-10.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/pthread/fib_safe-10.i -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 a48fe857d08ac3a4ba438de35e4bd3e7e5363b4267f7ed4ba2475f684ca08cd5 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 02:40:37,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 02:40:37,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 02:40:37,386 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 02:40:37,386 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 02:40:37,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 02:40:37,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 02:40:37,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 02:40:37,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 02:40:37,400 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 02:40:37,401 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 02:40:37,402 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 02:40:37,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 02:40:37,404 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 02:40:37,405 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 02:40:37,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 02:40:37,411 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 02:40:37,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 02:40:37,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 02:40:37,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 02:40:37,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 02:40:37,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 02:40:37,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 02:40:37,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 02:40:37,421 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 02:40:37,422 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 02:40:37,422 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 02:40:37,423 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 02:40:37,423 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 02:40:37,424 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 02:40:37,424 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 02:40:37,424 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 02:40:37,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 02:40:37,426 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 02:40:37,427 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 02:40:37,427 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 02:40:37,427 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 02:40:37,428 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 02:40:37,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 02:40:37,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 02:40:37,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 02:40:37,430 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 02:40:37,460 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 02:40:37,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 02:40:37,461 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 02:40:37,461 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 02:40:37,462 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 02:40:37,462 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 02:40:37,463 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 02:40:37,463 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 02:40:37,463 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 02:40:37,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 02:40:37,464 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 02:40:37,464 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 02:40:37,464 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 02:40:37,464 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 02:40:37,465 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 02:40:37,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 02:40:37,465 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 02:40:37,465 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 02:40:37,465 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 02:40:37,465 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 02:40:37,465 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 02:40:37,466 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 02:40:37,466 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 02:40:37,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 02:40:37,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:40:37,466 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 02:40:37,466 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 02:40:37,466 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 02:40:37,467 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 02:40:37,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 02:40:37,467 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 02:40:37,467 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 02:40:37,467 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 02:40:37,467 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a48fe857d08ac3a4ba438de35e4bd3e7e5363b4267f7ed4ba2475f684ca08cd5 [2021-12-28 02:40:37,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 02:40:37,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 02:40:37,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 02:40:37,735 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 02:40:37,737 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 02:40:37,738 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_safe-10.i [2021-12-28 02:40:37,783 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d0e27955/3129398c84a94c6c943f56007c198f14/FLAG2b9205faa [2021-12-28 02:40:38,160 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 02:40:38,161 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_safe-10.i [2021-12-28 02:40:38,172 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d0e27955/3129398c84a94c6c943f56007c198f14/FLAG2b9205faa [2021-12-28 02:40:38,184 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d0e27955/3129398c84a94c6c943f56007c198f14 [2021-12-28 02:40:38,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 02:40:38,191 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 02:40:38,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 02:40:38,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 02:40:38,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 02:40:38,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:40:38" (1/1) ... [2021-12-28 02:40:38,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fcab287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:40:38, skipping insertion in model container [2021-12-28 02:40:38,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:40:38" (1/1) ... [2021-12-28 02:40:38,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 02:40:38,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 02:40:38,532 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/pthread/fib_safe-10.i[30815,30828] [2021-12-28 02:40:38,535 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:40:38,541 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 02:40:38,583 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/pthread/fib_safe-10.i[30815,30828] [2021-12-28 02:40:38,584 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:40:38,613 INFO L208 MainTranslator]: Completed translation [2021-12-28 02:40:38,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:40:38 WrapperNode [2021-12-28 02:40:38,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 02:40:38,614 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 02:40:38,614 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 02:40:38,615 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 02:40:38,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:40:38" (1/1) ... [2021-12-28 02:40:38,643 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:40:38" (1/1) ... [2021-12-28 02:40:38,663 INFO L137 Inliner]: procedures = 164, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2021-12-28 02:40:38,664 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 02:40:38,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 02:40:38,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 02:40:38,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 02:40:38,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:40:38" (1/1) ... [2021-12-28 02:40:38,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:40:38" (1/1) ... [2021-12-28 02:40:38,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:40:38" (1/1) ... [2021-12-28 02:40:38,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:40:38" (1/1) ... [2021-12-28 02:40:38,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:40:38" (1/1) ... [2021-12-28 02:40:38,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:40:38" (1/1) ... [2021-12-28 02:40:38,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:40:38" (1/1) ... [2021-12-28 02:40:38,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 02:40:38,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 02:40:38,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 02:40:38,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 02:40:38,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:40:38" (1/1) ... [2021-12-28 02:40:38,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:40:38,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:40:38,728 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) [2021-12-28 02:40:38,741 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 [2021-12-28 02:40:38,763 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-12-28 02:40:38,764 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-12-28 02:40:38,764 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-12-28 02:40:38,764 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-12-28 02:40:38,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 02:40:38,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-28 02:40:38,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 02:40:38,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 02:40:38,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 02:40:38,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 02:40:38,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-28 02:40:38,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 02:40:38,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 02:40:38,766 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-28 02:40:38,896 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 02:40:38,897 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 02:40:39,069 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 02:40:39,076 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 02:40:39,077 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-28 02:40:39,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:40:39 BoogieIcfgContainer [2021-12-28 02:40:39,080 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 02:40:39,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 02:40:39,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 02:40:39,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 02:40:39,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 02:40:38" (1/3) ... [2021-12-28 02:40:39,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eca31bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:40:39, skipping insertion in model container [2021-12-28 02:40:39,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:40:38" (2/3) ... [2021-12-28 02:40:39,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eca31bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:40:39, skipping insertion in model container [2021-12-28 02:40:39,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:40:39" (3/3) ... [2021-12-28 02:40:39,086 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_safe-10.i [2021-12-28 02:40:39,089 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-28 02:40:39,089 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 02:40:39,090 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 02:40:39,090 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-28 02:40:39,136 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,136 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,136 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,136 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,137 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,137 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,137 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,138 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,138 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,139 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,139 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,139 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,140 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,140 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,140 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,140 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,141 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,141 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,142 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,142 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,142 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,142 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,143 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,143 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,143 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,143 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,143 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,144 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,144 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,144 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,144 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,145 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,145 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,145 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,145 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,145 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,149 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,150 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,150 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,150 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,150 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,152 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,153 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,153 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,153 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,154 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:40:39,154 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-12-28 02:40:39,194 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 02:40:39,199 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 [2021-12-28 02:40:39,199 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-28 02:40:39,210 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 96 places, 96 transitions, 202 flow [2021-12-28 02:40:39,251 INFO L129 PetriNetUnfolder]: 7/94 cut-off events. [2021-12-28 02:40:39,251 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-28 02:40:39,255 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 94 events. 7/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 73 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2021-12-28 02:40:39,255 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 96 transitions, 202 flow [2021-12-28 02:40:39,259 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 94 transitions, 194 flow [2021-12-28 02:40:39,283 INFO L129 PetriNetUnfolder]: 7/85 cut-off events. [2021-12-28 02:40:39,284 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-28 02:40:39,284 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:40:39,285 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] [2021-12-28 02:40:39,285 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 02:40:39,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:40:39,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1927097680, now seen corresponding path program 1 times [2021-12-28 02:40:39,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:40:39,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319679429] [2021-12-28 02:40:39,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:40:39,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:40:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:40:39,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:40:39,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:40:39,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319679429] [2021-12-28 02:40:39,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319679429] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:40:39,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:40:39,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 02:40:39,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058316487] [2021-12-28 02:40:39,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:40:39,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 02:40:39,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:40:39,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 02:40:39,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 02:40:39,532 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 96 [2021-12-28 02:40:39,534 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 94 transitions, 194 flow. Second operand has 2 states, 2 states have (on average 90.5) internal successors, (181), 2 states have internal predecessors, (181), 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) [2021-12-28 02:40:39,535 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:40:39,537 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 96 [2021-12-28 02:40:39,538 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:40:39,569 INFO L129 PetriNetUnfolder]: 3/89 cut-off events. [2021-12-28 02:40:39,569 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-28 02:40:39,570 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 89 events. 3/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 5/90 useless extension candidates. Maximal degree in co-relation 60. Up to 3 conditions per place. [2021-12-28 02:40:39,572 INFO L132 encePairwiseOnDemand]: 92/96 looper letters, 2 selfloop transitions, 0 changer transitions 0/89 dead transitions. [2021-12-28 02:40:39,572 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 89 transitions, 188 flow [2021-12-28 02:40:39,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 02:40:39,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-28 02:40:39,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 184 transitions. [2021-12-28 02:40:39,586 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9583333333333334 [2021-12-28 02:40:39,586 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 184 transitions. [2021-12-28 02:40:39,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 184 transitions. [2021-12-28 02:40:39,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:40:39,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 184 transitions. [2021-12-28 02:40:39,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 92.0) internal successors, (184), 2 states have internal predecessors, (184), 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) [2021-12-28 02:40:39,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 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) [2021-12-28 02:40:39,600 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 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) [2021-12-28 02:40:39,602 INFO L186 Difference]: Start difference. First operand has 94 places, 94 transitions, 194 flow. Second operand 2 states and 184 transitions. [2021-12-28 02:40:39,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 89 transitions, 188 flow [2021-12-28 02:40:39,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 89 transitions, 186 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-28 02:40:39,608 INFO L242 Difference]: Finished difference. Result has 92 places, 89 transitions, 182 flow [2021-12-28 02:40:39,610 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=182, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2021-12-28 02:40:39,613 INFO L334 CegarLoopForPetriNet]: 94 programPoint places, -2 predicate places. [2021-12-28 02:40:39,613 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 182 flow [2021-12-28 02:40:39,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 90.5) internal successors, (181), 2 states have internal predecessors, (181), 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) [2021-12-28 02:40:39,614 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:40:39,615 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] [2021-12-28 02:40:39,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 02:40:39,615 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 02:40:39,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:40:39,616 INFO L85 PathProgramCache]: Analyzing trace with hash 560415153, now seen corresponding path program 1 times [2021-12-28 02:40:39,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:40:39,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406363585] [2021-12-28 02:40:39,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:40:39,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:40:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:40:39,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:40:39,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:40:39,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406363585] [2021-12-28 02:40:39,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406363585] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:40:39,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:40:39,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:40:39,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006421463] [2021-12-28 02:40:39,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:40:39,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:40:39,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:40:39,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:40:39,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:40:39,706 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 96 [2021-12-28 02:40:39,707 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 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) [2021-12-28 02:40:39,707 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:40:39,707 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 96 [2021-12-28 02:40:39,707 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:40:39,744 INFO L129 PetriNetUnfolder]: 3/95 cut-off events. [2021-12-28 02:40:39,745 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-28 02:40:39,746 INFO L84 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 95 events. 3/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 110. Up to 6 conditions per place. [2021-12-28 02:40:39,747 INFO L132 encePairwiseOnDemand]: 93/96 looper letters, 9 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2021-12-28 02:40:39,747 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 92 transitions, 210 flow [2021-12-28 02:40:39,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:40:39,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-28 02:40:39,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2021-12-28 02:40:39,752 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.90625 [2021-12-28 02:40:39,752 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 261 transitions. [2021-12-28 02:40:39,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 261 transitions. [2021-12-28 02:40:39,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:40:39,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 261 transitions. [2021-12-28 02:40:39,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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) [2021-12-28 02:40:39,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 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) [2021-12-28 02:40:39,756 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 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) [2021-12-28 02:40:39,756 INFO L186 Difference]: Start difference. First operand has 92 places, 89 transitions, 182 flow. Second operand 3 states and 261 transitions. [2021-12-28 02:40:39,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 92 transitions, 210 flow [2021-12-28 02:40:39,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 92 transitions, 210 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-28 02:40:39,759 INFO L242 Difference]: Finished difference. Result has 95 places, 90 transitions, 194 flow [2021-12-28 02:40:39,759 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=95, PETRI_TRANSITIONS=90} [2021-12-28 02:40:39,760 INFO L334 CegarLoopForPetriNet]: 94 programPoint places, 1 predicate places. [2021-12-28 02:40:39,760 INFO L470 AbstractCegarLoop]: Abstraction has has 95 places, 90 transitions, 194 flow [2021-12-28 02:40:39,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 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) [2021-12-28 02:40:39,761 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:40:39,761 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] [2021-12-28 02:40:39,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 02:40:39,761 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 02:40:39,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:40:39,762 INFO L85 PathProgramCache]: Analyzing trace with hash -951035470, now seen corresponding path program 1 times [2021-12-28 02:40:39,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:40:39,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799114086] [2021-12-28 02:40:39,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:40:39,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:40:39,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:40:39,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:40:39,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:40:39,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799114086] [2021-12-28 02:40:39,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799114086] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:40:39,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104923647] [2021-12-28 02:40:39,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:40:39,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:40:39,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:40:39,849 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) [2021-12-28 02:40:39,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 02:40:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:40:39,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-28 02:40:39,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:40:40,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:40:40,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:40:40,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:40:40,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104923647] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:40:40,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 02:40:40,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-28 02:40:40,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999759389] [2021-12-28 02:40:40,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 02:40:40,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 02:40:40,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:40:40,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 02:40:40,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:40:40,136 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 96 [2021-12-28 02:40:40,136 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 90 transitions, 194 flow. Second operand has 10 states, 10 states have (on average 83.0) internal successors, (830), 10 states have internal predecessors, (830), 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) [2021-12-28 02:40:40,137 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:40:40,137 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 96 [2021-12-28 02:40:40,137 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:40:40,188 INFO L129 PetriNetUnfolder]: 3/104 cut-off events. [2021-12-28 02:40:40,188 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-28 02:40:40,189 INFO L84 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 104 events. 3/104 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 2/103 useless extension candidates. Maximal degree in co-relation 133. Up to 6 conditions per place. [2021-12-28 02:40:40,190 INFO L132 encePairwiseOnDemand]: 90/96 looper letters, 10 selfloop transitions, 9 changer transitions 0/98 dead transitions. [2021-12-28 02:40:40,190 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 98 transitions, 250 flow [2021-12-28 02:40:40,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 02:40:40,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-28 02:40:40,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 750 transitions. [2021-12-28 02:40:40,192 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8680555555555556 [2021-12-28 02:40:40,192 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 750 transitions. [2021-12-28 02:40:40,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 750 transitions. [2021-12-28 02:40:40,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:40:40,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 750 transitions. [2021-12-28 02:40:40,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 83.33333333333333) internal successors, (750), 9 states have internal predecessors, (750), 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) [2021-12-28 02:40:40,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 96.0) internal successors, (960), 10 states have internal predecessors, (960), 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) [2021-12-28 02:40:40,196 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 96.0) internal successors, (960), 10 states have internal predecessors, (960), 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) [2021-12-28 02:40:40,196 INFO L186 Difference]: Start difference. First operand has 95 places, 90 transitions, 194 flow. Second operand 9 states and 750 transitions. [2021-12-28 02:40:40,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 98 transitions, 250 flow [2021-12-28 02:40:40,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 98 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-28 02:40:40,198 INFO L242 Difference]: Finished difference. Result has 105 places, 96 transitions, 242 flow [2021-12-28 02:40:40,198 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=242, PETRI_PLACES=105, PETRI_TRANSITIONS=96} [2021-12-28 02:40:40,203 INFO L334 CegarLoopForPetriNet]: 94 programPoint places, 11 predicate places. [2021-12-28 02:40:40,203 INFO L470 AbstractCegarLoop]: Abstraction has has 105 places, 96 transitions, 242 flow [2021-12-28 02:40:40,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 83.0) internal successors, (830), 10 states have internal predecessors, (830), 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) [2021-12-28 02:40:40,204 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:40:40,204 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:40:40,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-28 02:40:40,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:40:40,423 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 02:40:40,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:40:40,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1666707666, now seen corresponding path program 2 times [2021-12-28 02:40:40,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:40:40,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14865328] [2021-12-28 02:40:40,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:40:40,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:40:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:40:40,507 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:40:40,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:40:40,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14865328] [2021-12-28 02:40:40,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14865328] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:40:40,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75356377] [2021-12-28 02:40:40,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 02:40:40,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:40:40,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:40:40,509 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) [2021-12-28 02:40:40,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 02:40:40,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 02:40:40,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 02:40:40,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 02:40:40,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:40:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:40:40,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:40:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:40:40,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75356377] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:40:40,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 02:40:40,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2021-12-28 02:40:40,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729599446] [2021-12-28 02:40:40,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 02:40:40,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-28 02:40:40,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:40:40,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-28 02:40:40,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-12-28 02:40:40,822 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 96 [2021-12-28 02:40:40,823 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 96 transitions, 242 flow. Second operand has 18 states, 18 states have (on average 83.0) internal successors, (1494), 18 states have internal predecessors, (1494), 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) [2021-12-28 02:40:40,824 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:40:40,824 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 96 [2021-12-28 02:40:40,824 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:40:40,970 INFO L129 PetriNetUnfolder]: 3/132 cut-off events. [2021-12-28 02:40:40,971 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2021-12-28 02:40:40,973 INFO L84 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 132 events. 3/132 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 4/133 useless extension candidates. Maximal degree in co-relation 224. Up to 11 conditions per place. [2021-12-28 02:40:40,973 INFO L132 encePairwiseOnDemand]: 90/96 looper letters, 14 selfloop transitions, 21 changer transitions 0/114 dead transitions. [2021-12-28 02:40:40,973 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 114 transitions, 408 flow [2021-12-28 02:40:40,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-28 02:40:40,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-28 02:40:40,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1740 transitions. [2021-12-28 02:40:40,977 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8630952380952381 [2021-12-28 02:40:40,977 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1740 transitions. [2021-12-28 02:40:40,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1740 transitions. [2021-12-28 02:40:40,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:40:40,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1740 transitions. [2021-12-28 02:40:40,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 82.85714285714286) internal successors, (1740), 21 states have internal predecessors, (1740), 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) [2021-12-28 02:40:40,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 96.0) internal successors, (2112), 22 states have internal predecessors, (2112), 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) [2021-12-28 02:40:40,985 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 96.0) internal successors, (2112), 22 states have internal predecessors, (2112), 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) [2021-12-28 02:40:40,985 INFO L186 Difference]: Start difference. First operand has 105 places, 96 transitions, 242 flow. Second operand 21 states and 1740 transitions. [2021-12-28 02:40:40,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 114 transitions, 408 flow [2021-12-28 02:40:40,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 114 transitions, 394 flow, removed 6 selfloop flow, removed 1 redundant places. [2021-12-28 02:40:40,991 INFO L242 Difference]: Finished difference. Result has 129 places, 109 transitions, 366 flow [2021-12-28 02:40:40,991 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=366, PETRI_PLACES=129, PETRI_TRANSITIONS=109} [2021-12-28 02:40:40,992 INFO L334 CegarLoopForPetriNet]: 94 programPoint places, 35 predicate places. [2021-12-28 02:40:40,992 INFO L470 AbstractCegarLoop]: Abstraction has has 129 places, 109 transitions, 366 flow [2021-12-28 02:40:40,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 83.0) internal successors, (1494), 18 states have internal predecessors, (1494), 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) [2021-12-28 02:40:40,993 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:40:40,993 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:40:41,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 02:40:41,213 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,SelfDestructingSolverStorable3 [2021-12-28 02:40:41,214 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 02:40:41,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:40:41,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1283180782, now seen corresponding path program 3 times [2021-12-28 02:40:41,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:40:41,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897742310] [2021-12-28 02:40:41,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:40:41,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:40:41,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:40:41,393 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:40:41,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:40:41,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897742310] [2021-12-28 02:40:41,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897742310] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:40:41,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948656767] [2021-12-28 02:40:41,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 02:40:41,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:40:41,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:40:41,395 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) [2021-12-28 02:40:41,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 02:40:41,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-28 02:40:41,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 02:40:41,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-28 02:40:41,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:40:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:40:41,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:40:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:40:41,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948656767] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:40:41,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 02:40:41,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2021-12-28 02:40:41,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450549078] [2021-12-28 02:40:41,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 02:40:41,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-28 02:40:41,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:40:41,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-28 02:40:41,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2021-12-28 02:40:41,923 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 96 [2021-12-28 02:40:41,925 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 109 transitions, 366 flow. Second operand has 34 states, 34 states have (on average 83.0) internal successors, (2822), 34 states have internal predecessors, (2822), 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) [2021-12-28 02:40:41,926 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:40:41,926 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 96 [2021-12-28 02:40:41,926 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:40:42,382 INFO L129 PetriNetUnfolder]: 3/188 cut-off events. [2021-12-28 02:40:42,382 INFO L130 PetriNetUnfolder]: For 262/262 co-relation queries the response was YES. [2021-12-28 02:40:42,383 INFO L84 FinitePrefix]: Finished finitePrefix Result has 450 conditions, 188 events. 3/188 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 8/193 useless extension candidates. Maximal degree in co-relation 438. Up to 27 conditions per place. [2021-12-28 02:40:42,384 INFO L132 encePairwiseOnDemand]: 90/96 looper letters, 22 selfloop transitions, 45 changer transitions 0/146 dead transitions. [2021-12-28 02:40:42,384 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 146 transitions, 788 flow [2021-12-28 02:40:42,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-28 02:40:42,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-12-28 02:40:42,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3720 transitions. [2021-12-28 02:40:42,390 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8611111111111112 [2021-12-28 02:40:42,390 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3720 transitions. [2021-12-28 02:40:42,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3720 transitions. [2021-12-28 02:40:42,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:40:42,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3720 transitions. [2021-12-28 02:40:42,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 82.66666666666667) internal successors, (3720), 45 states have internal predecessors, (3720), 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) [2021-12-28 02:40:42,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 96.0) internal successors, (4416), 46 states have internal predecessors, (4416), 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) [2021-12-28 02:40:42,404 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 96.0) internal successors, (4416), 46 states have internal predecessors, (4416), 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) [2021-12-28 02:40:42,404 INFO L186 Difference]: Start difference. First operand has 129 places, 109 transitions, 366 flow. Second operand 45 states and 3720 transitions. [2021-12-28 02:40:42,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 146 transitions, 788 flow [2021-12-28 02:40:42,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 146 transitions, 748 flow, removed 14 selfloop flow, removed 6 redundant places. [2021-12-28 02:40:42,409 INFO L242 Difference]: Finished difference. Result has 176 places, 134 transitions, 644 flow [2021-12-28 02:40:42,409 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=644, PETRI_PLACES=176, PETRI_TRANSITIONS=134} [2021-12-28 02:40:42,410 INFO L334 CegarLoopForPetriNet]: 94 programPoint places, 82 predicate places. [2021-12-28 02:40:42,410 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 134 transitions, 644 flow [2021-12-28 02:40:42,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 83.0) internal successors, (2822), 34 states have internal predecessors, (2822), 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) [2021-12-28 02:40:42,411 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:40:42,411 INFO L254 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:40:42,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 02:40:42,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:40:42,632 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 02:40:42,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:40:42,632 INFO L85 PathProgramCache]: Analyzing trace with hash 835265426, now seen corresponding path program 4 times [2021-12-28 02:40:42,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:40:42,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124368744] [2021-12-28 02:40:42,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:40:42,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:40:42,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:40:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:40:42,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:40:42,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124368744] [2021-12-28 02:40:42,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124368744] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:40:42,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740063914] [2021-12-28 02:40:42,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-28 02:40:42,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:40:42,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:40:42,991 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:40:42,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 02:40:43,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-28 02:40:43,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 02:40:43,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-28 02:40:43,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:40:45,364 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 572 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:40:45,364 INFO L328 TraceCheckSpWp]: Computing backward predicates...