./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/forester-heap/dll-sorted-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-sorted-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4b55b51cb0b3b4f908f36b1c6f95a18eadc174b8702aa08ef4d6f9775df6bb52 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:38:00,597 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:38:00,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:38:00,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:38:00,655 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:38:00,656 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:38:00,658 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:38:00,660 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:38:00,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:38:00,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:38:00,665 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:38:00,666 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:38:00,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:38:00,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:38:00,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:38:00,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:38:00,673 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:38:00,674 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:38:00,676 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:38:00,679 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:38:00,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:38:00,682 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:38:00,683 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:38:00,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:38:00,688 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:38:00,688 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:38:00,689 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:38:00,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:38:00,691 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:38:00,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:38:00,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:38:00,693 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:38:00,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:38:00,695 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:38:00,697 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:38:00,697 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:38:00,698 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:38:00,698 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:38:00,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:38:00,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:38:00,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:38:00,702 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-10-28 09:38:00,744 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:38:00,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:38:00,745 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:38:00,745 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:38:00,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:38:00,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:38:00,752 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:38:00,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:38:00,753 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:38:00,753 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 09:38:00,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:38:00,754 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:38:00,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:38:00,754 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 09:38:00,754 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 09:38:00,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:38:00,755 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 09:38:00,755 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:38:00,755 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:38:00,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:38:00,756 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:38:00,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:38:00,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:38:00,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:38:00,757 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:38:00,757 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:38:00,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:38:00,758 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:38:00,758 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b55b51cb0b3b4f908f36b1c6f95a18eadc174b8702aa08ef4d6f9775df6bb52 [2021-10-28 09:38:01,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:38:01,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:38:01,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:38:01,125 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:38:01,126 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:38:01,127 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/forester-heap/dll-sorted-1.i [2021-10-28 09:38:01,190 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/data/5085b5517/5edc9dfbf7e74af9927cb43b990dc622/FLAG4bd430316 [2021-10-28 09:38:01,761 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:38:01,761 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/sv-benchmarks/c/forester-heap/dll-sorted-1.i [2021-10-28 09:38:01,783 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/data/5085b5517/5edc9dfbf7e74af9927cb43b990dc622/FLAG4bd430316 [2021-10-28 09:38:02,045 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/data/5085b5517/5edc9dfbf7e74af9927cb43b990dc622 [2021-10-28 09:38:02,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:38:02,050 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 09:38:02,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:38:02,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:38:02,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:38:02,057 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:38:02" (1/1) ... [2021-10-28 09:38:02,058 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@788f216c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:38:02, skipping insertion in model container [2021-10-28 09:38:02,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:38:02" (1/1) ... [2021-10-28 09:38:02,065 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:38:02,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:38:02,433 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/sv-benchmarks/c/forester-heap/dll-sorted-1.i[22384,22397] [2021-10-28 09:38:02,439 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/sv-benchmarks/c/forester-heap/dll-sorted-1.i[22614,22627] [2021-10-28 09:38:02,449 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/sv-benchmarks/c/forester-heap/dll-sorted-1.i[22989,23002] [2021-10-28 09:38:02,451 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/sv-benchmarks/c/forester-heap/dll-sorted-1.i[23053,23066] [2021-10-28 09:38:02,454 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/sv-benchmarks/c/forester-heap/dll-sorted-1.i[23184,23197] [2021-10-28 09:38:02,455 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/sv-benchmarks/c/forester-heap/dll-sorted-1.i[23248,23261] [2021-10-28 09:38:02,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:38:02,474 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:38:02,538 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/sv-benchmarks/c/forester-heap/dll-sorted-1.i[22384,22397] [2021-10-28 09:38:02,542 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/sv-benchmarks/c/forester-heap/dll-sorted-1.i[22614,22627] [2021-10-28 09:38:02,552 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/sv-benchmarks/c/forester-heap/dll-sorted-1.i[22989,23002] [2021-10-28 09:38:02,554 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/sv-benchmarks/c/forester-heap/dll-sorted-1.i[23053,23066] [2021-10-28 09:38:02,555 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/sv-benchmarks/c/forester-heap/dll-sorted-1.i[23184,23197] [2021-10-28 09:38:02,558 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/sv-benchmarks/c/forester-heap/dll-sorted-1.i[23248,23261] [2021-10-28 09:38:02,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:38:02,598 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:38:02,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:38:02 WrapperNode [2021-10-28 09:38:02,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:38:02,600 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:38:02,600 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:38:02,600 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:38:02,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:38:02" (1/1) ... [2021-10-28 09:38:02,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:38:02" (1/1) ... [2021-10-28 09:38:02,645 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:38:02" (1/1) ... [2021-10-28 09:38:02,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:38:02" (1/1) ... [2021-10-28 09:38:02,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:38:02" (1/1) ... [2021-10-28 09:38:02,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:38:02" (1/1) ... [2021-10-28 09:38:02,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:38:02" (1/1) ... [2021-10-28 09:38:02,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:38:02,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:38:02,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:38:02,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:38:02,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:38:02" (1/1) ... [2021-10-28 09:38:02,727 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:38:02,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:38:02,754 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:38:02,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:38:02,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 09:38:02,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:38:02,811 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 09:38:02,811 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 09:38:02,811 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 09:38:02,811 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 09:38:02,811 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 09:38:02,811 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 09:38:02,812 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 09:38:02,812 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 09:38:02,812 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 09:38:02,812 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 09:38:02,812 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 09:38:02,812 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 09:38:02,812 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 09:38:02,812 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 09:38:02,813 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 09:38:02,813 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 09:38:02,814 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 09:38:02,814 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 09:38:02,814 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 09:38:02,814 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 09:38:02,814 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 09:38:02,814 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 09:38:02,814 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 09:38:02,814 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 09:38:02,815 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 09:38:02,815 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 09:38:02,815 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 09:38:02,815 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 09:38:02,815 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 09:38:02,815 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 09:38:02,815 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 09:38:02,815 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 09:38:02,816 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 09:38:02,816 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 09:38:02,816 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 09:38:02,816 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 09:38:02,816 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 09:38:02,816 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 09:38:02,817 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 09:38:02,817 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 09:38:02,817 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 09:38:02,817 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 09:38:02,818 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 09:38:02,818 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 09:38:02,818 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 09:38:02,818 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 09:38:02,818 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 09:38:02,818 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 09:38:02,819 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 09:38:02,819 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 09:38:02,819 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 09:38:02,819 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 09:38:02,819 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 09:38:02,819 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 09:38:02,820 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 09:38:02,821 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 09:38:02,821 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-28 09:38:02,822 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 09:38:02,823 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 09:38:02,823 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 09:38:02,823 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 09:38:02,823 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 09:38:02,824 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 09:38:02,824 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 09:38:02,824 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 09:38:02,824 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 09:38:02,824 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 09:38:02,825 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 09:38:02,825 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 09:38:02,825 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 09:38:02,825 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 09:38:02,825 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 09:38:02,826 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 09:38:02,826 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 09:38:02,826 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 09:38:02,826 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 09:38:02,826 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 09:38:02,826 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 09:38:02,826 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 09:38:02,826 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 09:38:02,827 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 09:38:02,827 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 09:38:02,827 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 09:38:02,827 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 09:38:02,827 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 09:38:02,827 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 09:38:02,827 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 09:38:02,827 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 09:38:02,827 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 09:38:02,828 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 09:38:02,828 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 09:38:02,828 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 09:38:02,828 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 09:38:02,828 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 09:38:02,828 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 09:38:02,829 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 09:38:02,829 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 09:38:02,829 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 09:38:02,829 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 09:38:02,829 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 09:38:02,829 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 09:38:02,829 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 09:38:02,829 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 09:38:02,830 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 09:38:02,830 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 09:38:02,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 09:38:02,830 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 09:38:02,830 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 09:38:02,830 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 09:38:02,830 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 09:38:02,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:38:02,831 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 09:38:02,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 09:38:02,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 09:38:02,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 09:38:02,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 09:38:02,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 09:38:02,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 09:38:02,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 09:38:02,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 09:38:02,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:38:03,646 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:38:03,646 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-28 09:38:03,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:38:03 BoogieIcfgContainer [2021-10-28 09:38:03,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:38:03,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:38:03,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:38:03,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:38:03,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:38:02" (1/3) ... [2021-10-28 09:38:03,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56c0d99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:38:03, skipping insertion in model container [2021-10-28 09:38:03,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:38:02" (2/3) ... [2021-10-28 09:38:03,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56c0d99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:38:03, skipping insertion in model container [2021-10-28 09:38:03,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:38:03" (3/3) ... [2021-10-28 09:38:03,664 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-sorted-1.i [2021-10-28 09:38:03,670 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:38:03,670 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2021-10-28 09:38:03,726 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:38:03,733 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-10-28 09:38:03,733 INFO L340 AbstractCegarLoop]: Starting to check reachability of 80 error locations. [2021-10-28 09:38:03,754 INFO L276 IsEmpty]: Start isEmpty. Operand has 184 states, 99 states have (on average 2.1717171717171717) internal successors, (215), 179 states have internal predecessors, (215), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:38:03,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-28 09:38:03,759 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:38:03,760 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:38:03,760 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 09:38:03,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:38:03,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1404346321, now seen corresponding path program 1 times [2021-10-28 09:38:03,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:38:03,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794316192] [2021-10-28 09:38:03,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:38:03,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:38:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:03,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:38:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:38:04,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:38:04,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794316192] [2021-10-28 09:38:04,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794316192] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:38:04,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:38:04,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:38:04,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096877508] [2021-10-28 09:38:04,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:38:04,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:38:04,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:38:04,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:38:04,038 INFO L87 Difference]: Start difference. First operand has 184 states, 99 states have (on average 2.1717171717171717) internal successors, (215), 179 states have internal predecessors, (215), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:04,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:38:04,378 INFO L93 Difference]: Finished difference Result 186 states and 198 transitions. [2021-10-28 09:38:04,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:38:04,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-10-28 09:38:04,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:38:04,392 INFO L225 Difference]: With dead ends: 186 [2021-10-28 09:38:04,392 INFO L226 Difference]: Without dead ends: 182 [2021-10-28 09:38:04,395 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:38:04,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-10-28 09:38:04,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 178. [2021-10-28 09:38:04,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 98 states have (on average 1.8979591836734695) internal successors, (186), 174 states have internal predecessors, (186), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:04,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 189 transitions. [2021-10-28 09:38:04,459 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 189 transitions. Word has length 7 [2021-10-28 09:38:04,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:38:04,459 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 189 transitions. [2021-10-28 09:38:04,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:04,460 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 189 transitions. [2021-10-28 09:38:04,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-28 09:38:04,461 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:38:04,461 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:38:04,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:38:04,462 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 09:38:04,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:38:04,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1404346320, now seen corresponding path program 1 times [2021-10-28 09:38:04,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:38:04,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560664519] [2021-10-28 09:38:04,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:38:04,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:38:04,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:04,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:38:04,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:38:04,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:38:04,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560664519] [2021-10-28 09:38:04,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560664519] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:38:04,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:38:04,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:38:04,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820546649] [2021-10-28 09:38:04,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:38:04,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:38:04,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:38:04,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:38:04,603 INFO L87 Difference]: Start difference. First operand 178 states and 189 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:04,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:38:04,931 INFO L93 Difference]: Finished difference Result 179 states and 190 transitions. [2021-10-28 09:38:04,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:38:04,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-10-28 09:38:04,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:38:04,936 INFO L225 Difference]: With dead ends: 179 [2021-10-28 09:38:04,936 INFO L226 Difference]: Without dead ends: 179 [2021-10-28 09:38:04,937 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:38:04,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-10-28 09:38:04,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2021-10-28 09:38:04,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 98 states have (on average 1.8673469387755102) internal successors, (183), 171 states have internal predecessors, (183), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:04,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 186 transitions. [2021-10-28 09:38:04,957 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 186 transitions. Word has length 7 [2021-10-28 09:38:04,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:38:04,958 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 186 transitions. [2021-10-28 09:38:04,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:04,958 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 186 transitions. [2021-10-28 09:38:04,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 09:38:04,959 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:38:04,959 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:38:04,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 09:38:04,959 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 09:38:04,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:38:04,960 INFO L85 PathProgramCache]: Analyzing trace with hash -155484519, now seen corresponding path program 1 times [2021-10-28 09:38:04,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:38:04,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782773503] [2021-10-28 09:38:04,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:38:04,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:38:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:05,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:38:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:38:05,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:38:05,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782773503] [2021-10-28 09:38:05,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782773503] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:38:05,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:38:05,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:38:05,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917006706] [2021-10-28 09:38:05,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:38:05,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:38:05,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:38:05,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:38:05,115 INFO L87 Difference]: Start difference. First operand 175 states and 186 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:05,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:38:05,572 INFO L93 Difference]: Finished difference Result 289 states and 309 transitions. [2021-10-28 09:38:05,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:38:05,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-28 09:38:05,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:38:05,576 INFO L225 Difference]: With dead ends: 289 [2021-10-28 09:38:05,576 INFO L226 Difference]: Without dead ends: 289 [2021-10-28 09:38:05,576 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:38:05,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-10-28 09:38:05,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 234. [2021-10-28 09:38:05,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 157 states have (on average 1.8535031847133758) internal successors, (291), 230 states have internal predecessors, (291), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:05,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 294 transitions. [2021-10-28 09:38:05,592 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 294 transitions. Word has length 13 [2021-10-28 09:38:05,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:38:05,592 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 294 transitions. [2021-10-28 09:38:05,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:05,593 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 294 transitions. [2021-10-28 09:38:05,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 09:38:05,593 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:38:05,594 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:38:05,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 09:38:05,594 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 09:38:05,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:38:05,595 INFO L85 PathProgramCache]: Analyzing trace with hash -155484520, now seen corresponding path program 1 times [2021-10-28 09:38:05,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:38:05,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937481637] [2021-10-28 09:38:05,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:38:05,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:38:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:05,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:38:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:38:05,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:38:05,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937481637] [2021-10-28 09:38:05,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937481637] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:38:05,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:38:05,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:38:05,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380511613] [2021-10-28 09:38:05,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:38:05,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:38:05,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:38:05,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:38:05,674 INFO L87 Difference]: Start difference. First operand 234 states and 294 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:06,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:38:06,004 INFO L93 Difference]: Finished difference Result 232 states and 272 transitions. [2021-10-28 09:38:06,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:38:06,004 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-28 09:38:06,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:38:06,006 INFO L225 Difference]: With dead ends: 232 [2021-10-28 09:38:06,007 INFO L226 Difference]: Without dead ends: 232 [2021-10-28 09:38:06,007 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:38:06,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-10-28 09:38:06,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 224. [2021-10-28 09:38:06,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 165 states have (on average 1.612121212121212) internal successors, (266), 220 states have internal predecessors, (266), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:06,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 269 transitions. [2021-10-28 09:38:06,016 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 269 transitions. Word has length 13 [2021-10-28 09:38:06,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:38:06,016 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 269 transitions. [2021-10-28 09:38:06,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:06,017 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 269 transitions. [2021-10-28 09:38:06,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 09:38:06,017 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:38:06,017 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:38:06,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 09:38:06,018 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr20ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 09:38:06,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:38:06,018 INFO L85 PathProgramCache]: Analyzing trace with hash 903211970, now seen corresponding path program 1 times [2021-10-28 09:38:06,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:38:06,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181309873] [2021-10-28 09:38:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:38:06,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:38:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:06,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:38:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:06,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:38:06,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:38:06,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181309873] [2021-10-28 09:38:06,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181309873] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:38:06,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:38:06,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:38:06,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743603800] [2021-10-28 09:38:06,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:38:06,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:38:06,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:38:06,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:38:06,087 INFO L87 Difference]: Start difference. First operand 224 states and 269 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:06,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:38:06,312 INFO L93 Difference]: Finished difference Result 270 states and 319 transitions. [2021-10-28 09:38:06,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:38:06,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-28 09:38:06,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:38:06,314 INFO L225 Difference]: With dead ends: 270 [2021-10-28 09:38:06,314 INFO L226 Difference]: Without dead ends: 270 [2021-10-28 09:38:06,315 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:38:06,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-10-28 09:38:06,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 237. [2021-10-28 09:38:06,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 178 states have (on average 1.6067415730337078) internal successors, (286), 233 states have internal predecessors, (286), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:06,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 289 transitions. [2021-10-28 09:38:06,322 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 289 transitions. Word has length 15 [2021-10-28 09:38:06,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:38:06,322 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 289 transitions. [2021-10-28 09:38:06,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:06,323 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 289 transitions. [2021-10-28 09:38:06,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 09:38:06,323 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:38:06,323 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:38:06,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 09:38:06,324 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 09:38:06,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:38:06,324 INFO L85 PathProgramCache]: Analyzing trace with hash -2064587218, now seen corresponding path program 1 times [2021-10-28 09:38:06,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:38:06,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349012057] [2021-10-28 09:38:06,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:38:06,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:38:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:06,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:38:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:06,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:38:06,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:38:06,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349012057] [2021-10-28 09:38:06,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349012057] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:38:06,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:38:06,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:38:06,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783447871] [2021-10-28 09:38:06,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:38:06,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:38:06,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:38:06,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:38:06,405 INFO L87 Difference]: Start difference. First operand 237 states and 289 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:06,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:38:06,727 INFO L93 Difference]: Finished difference Result 236 states and 286 transitions. [2021-10-28 09:38:06,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:38:06,728 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-28 09:38:06,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:38:06,729 INFO L225 Difference]: With dead ends: 236 [2021-10-28 09:38:06,729 INFO L226 Difference]: Without dead ends: 236 [2021-10-28 09:38:06,730 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:38:06,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-10-28 09:38:06,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-10-28 09:38:06,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 178 states have (on average 1.5898876404494382) internal successors, (283), 232 states have internal predecessors, (283), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:06,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 286 transitions. [2021-10-28 09:38:06,736 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 286 transitions. Word has length 16 [2021-10-28 09:38:06,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:38:06,737 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 286 transitions. [2021-10-28 09:38:06,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:06,737 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 286 transitions. [2021-10-28 09:38:06,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 09:38:06,738 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:38:06,738 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:38:06,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 09:38:06,738 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr11REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 09:38:06,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:38:06,739 INFO L85 PathProgramCache]: Analyzing trace with hash -2064587217, now seen corresponding path program 1 times [2021-10-28 09:38:06,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:38:06,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199692578] [2021-10-28 09:38:06,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:38:06,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:38:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:06,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:38:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:06,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:38:06,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:38:06,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199692578] [2021-10-28 09:38:06,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199692578] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:38:06,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:38:06,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:38:06,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961294550] [2021-10-28 09:38:06,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:38:06,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:38:06,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:38:06,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:38:06,822 INFO L87 Difference]: Start difference. First operand 236 states and 286 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:07,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:38:07,152 INFO L93 Difference]: Finished difference Result 235 states and 283 transitions. [2021-10-28 09:38:07,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:38:07,157 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-28 09:38:07,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:38:07,158 INFO L225 Difference]: With dead ends: 235 [2021-10-28 09:38:07,158 INFO L226 Difference]: Without dead ends: 235 [2021-10-28 09:38:07,158 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:38:07,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-10-28 09:38:07,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2021-10-28 09:38:07,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 178 states have (on average 1.5730337078651686) internal successors, (280), 231 states have internal predecessors, (280), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:07,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 283 transitions. [2021-10-28 09:38:07,163 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 283 transitions. Word has length 16 [2021-10-28 09:38:07,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:38:07,164 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 283 transitions. [2021-10-28 09:38:07,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:07,164 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 283 transitions. [2021-10-28 09:38:07,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 09:38:07,165 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:38:07,165 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:38:07,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 09:38:07,165 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 09:38:07,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:38:07,166 INFO L85 PathProgramCache]: Analyzing trace with hash 949671408, now seen corresponding path program 1 times [2021-10-28 09:38:07,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:38:07,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649542665] [2021-10-28 09:38:07,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:38:07,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:38:07,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:07,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:38:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:07,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:38:07,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:38:07,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649542665] [2021-10-28 09:38:07,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649542665] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:38:07,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:38:07,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 09:38:07,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681811679] [2021-10-28 09:38:07,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:38:07,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:38:07,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:38:07,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:38:07,282 INFO L87 Difference]: Start difference. First operand 235 states and 283 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:07,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:38:07,861 INFO L93 Difference]: Finished difference Result 242 states and 284 transitions. [2021-10-28 09:38:07,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:38:07,862 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-28 09:38:07,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:38:07,864 INFO L225 Difference]: With dead ends: 242 [2021-10-28 09:38:07,864 INFO L226 Difference]: Without dead ends: 242 [2021-10-28 09:38:07,864 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-10-28 09:38:07,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-10-28 09:38:07,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 234. [2021-10-28 09:38:07,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 178 states have (on average 1.5617977528089888) internal successors, (278), 230 states have internal predecessors, (278), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:07,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 281 transitions. [2021-10-28 09:38:07,872 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 281 transitions. Word has length 20 [2021-10-28 09:38:07,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:38:07,872 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 281 transitions. [2021-10-28 09:38:07,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:07,873 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 281 transitions. [2021-10-28 09:38:07,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 09:38:07,874 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:38:07,874 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:38:07,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 09:38:07,874 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr15REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 09:38:07,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:38:07,875 INFO L85 PathProgramCache]: Analyzing trace with hash 949671409, now seen corresponding path program 1 times [2021-10-28 09:38:07,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:38:07,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178930320] [2021-10-28 09:38:07,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:38:07,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:38:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:08,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:38:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:38:08,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:38:08,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178930320] [2021-10-28 09:38:08,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178930320] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:38:08,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:38:08,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 09:38:08,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140975741] [2021-10-28 09:38:08,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 09:38:08,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:38:08,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:38:08,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:38:08,051 INFO L87 Difference]: Start difference. First operand 234 states and 281 transitions. Second operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:08,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:38:08,772 INFO L93 Difference]: Finished difference Result 237 states and 275 transitions. [2021-10-28 09:38:08,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 09:38:08,773 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-28 09:38:08,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:38:08,775 INFO L225 Difference]: With dead ends: 237 [2021-10-28 09:38:08,775 INFO L226 Difference]: Without dead ends: 237 [2021-10-28 09:38:08,775 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-10-28 09:38:08,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-10-28 09:38:08,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 220. [2021-10-28 09:38:08,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 170 states have (on average 1.5294117647058822) internal successors, (260), 216 states have internal predecessors, (260), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:08,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 263 transitions. [2021-10-28 09:38:08,781 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 263 transitions. Word has length 20 [2021-10-28 09:38:08,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:38:08,782 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 263 transitions. [2021-10-28 09:38:08,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:08,782 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 263 transitions. [2021-10-28 09:38:08,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 09:38:08,783 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:38:08,783 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:38:08,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 09:38:08,783 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr20ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 09:38:08,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:38:08,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1432225935, now seen corresponding path program 1 times [2021-10-28 09:38:08,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:38:08,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115894187] [2021-10-28 09:38:08,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:38:08,784 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:38:08,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:08,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:38:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:08,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:38:08,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:38:08,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115894187] [2021-10-28 09:38:08,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115894187] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:38:08,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:38:08,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:38:08,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316316874] [2021-10-28 09:38:08,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:38:08,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:38:08,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:38:08,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:38:08,858 INFO L87 Difference]: Start difference. First operand 220 states and 263 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:09,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:38:09,101 INFO L93 Difference]: Finished difference Result 258 states and 281 transitions. [2021-10-28 09:38:09,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:38:09,102 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-10-28 09:38:09,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:38:09,104 INFO L225 Difference]: With dead ends: 258 [2021-10-28 09:38:09,104 INFO L226 Difference]: Without dead ends: 258 [2021-10-28 09:38:09,104 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:38:09,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-10-28 09:38:09,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 218. [2021-10-28 09:38:09,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 169 states have (on average 1.514792899408284) internal successors, (256), 214 states have internal predecessors, (256), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:09,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 259 transitions. [2021-10-28 09:38:09,110 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 259 transitions. Word has length 29 [2021-10-28 09:38:09,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:38:09,111 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 259 transitions. [2021-10-28 09:38:09,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:09,111 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 259 transitions. [2021-10-28 09:38:09,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 09:38:09,112 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:38:09,112 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:38:09,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 09:38:09,112 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr25REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 09:38:09,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:38:09,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1716077152, now seen corresponding path program 1 times [2021-10-28 09:38:09,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:38:09,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627061609] [2021-10-28 09:38:09,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:38:09,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:38:09,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:09,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:38:09,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:38:09,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:38:09,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627061609] [2021-10-28 09:38:09,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627061609] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:38:09,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73088448] [2021-10-28 09:38:09,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:38:09,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:38:09,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:38:09,400 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:38:09,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 09:38:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:09,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 09:38:09,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:38:09,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 09:38:09,793 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 09:38:09,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 09:38:09,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 09:38:10,083 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 09:38:10,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-10-28 09:38:10,370 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-10-28 09:38:10,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 48 [2021-10-28 09:38:10,560 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-28 09:38:10,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 45 [2021-10-28 09:38:10,935 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-28 09:38:10,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 33 [2021-10-28 09:38:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:38:10,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73088448] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:38:10,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:38:10,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-10-28 09:38:10,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55146245] [2021-10-28 09:38:10,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 09:38:10,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:38:10,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 09:38:10,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-10-28 09:38:10,984 INFO L87 Difference]: Start difference. First operand 218 states and 259 transitions. Second operand has 27 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:13,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:38:13,105 INFO L93 Difference]: Finished difference Result 423 states and 480 transitions. [2021-10-28 09:38:13,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-28 09:38:13,106 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-10-28 09:38:13,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:38:13,109 INFO L225 Difference]: With dead ends: 423 [2021-10-28 09:38:13,110 INFO L226 Difference]: Without dead ends: 423 [2021-10-28 09:38:13,111 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=376, Invalid=1786, Unknown=0, NotChecked=0, Total=2162 [2021-10-28 09:38:13,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-10-28 09:38:13,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 243. [2021-10-28 09:38:13,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 194 states have (on average 1.4690721649484537) internal successors, (285), 239 states have internal predecessors, (285), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:13,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 288 transitions. [2021-10-28 09:38:13,122 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 288 transitions. Word has length 35 [2021-10-28 09:38:13,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:38:13,123 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 288 transitions. [2021-10-28 09:38:13,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:13,123 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 288 transitions. [2021-10-28 09:38:13,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 09:38:13,125 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:38:13,125 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:38:13,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:38:13,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:38:13,341 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr26REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 09:38:13,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:38:13,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1716077151, now seen corresponding path program 1 times [2021-10-28 09:38:13,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:38:13,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292722688] [2021-10-28 09:38:13,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:38:13,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:38:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:13,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:38:13,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:38:13,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:38:13,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292722688] [2021-10-28 09:38:13,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292722688] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:38:13,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982969450] [2021-10-28 09:38:13,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:38:13,719 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:38:13,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:38:13,722 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:38:13,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 09:38:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:13,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 09:38:13,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:38:14,155 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 09:38:14,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-10-28 09:38:14,181 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-28 09:38:14,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2021-10-28 09:38:14,396 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-10-28 09:38:14,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 90 [2021-10-28 09:38:14,421 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-10-28 09:38:14,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 66 [2021-10-28 09:38:15,242 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-10-28 09:38:15,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 81 [2021-10-28 09:38:15,258 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-28 09:38:15,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 47 [2021-10-28 09:38:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:38:15,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982969450] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:38:15,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:38:15,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-10-28 09:38:15,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989492470] [2021-10-28 09:38:15,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-28 09:38:15,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:38:15,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-28 09:38:15,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-10-28 09:38:15,313 INFO L87 Difference]: Start difference. First operand 243 states and 288 transitions. Second operand has 25 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:18,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:38:18,171 INFO L93 Difference]: Finished difference Result 435 states and 488 transitions. [2021-10-28 09:38:18,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 09:38:18,172 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-10-28 09:38:18,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:38:18,175 INFO L225 Difference]: With dead ends: 435 [2021-10-28 09:38:18,175 INFO L226 Difference]: Without dead ends: 435 [2021-10-28 09:38:18,178 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=484, Invalid=1966, Unknown=0, NotChecked=0, Total=2450 [2021-10-28 09:38:18,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-10-28 09:38:18,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 244. [2021-10-28 09:38:18,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 195 states have (on average 1.4615384615384615) internal successors, (285), 240 states have internal predecessors, (285), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:18,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 288 transitions. [2021-10-28 09:38:18,186 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 288 transitions. Word has length 35 [2021-10-28 09:38:18,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:38:18,189 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 288 transitions. [2021-10-28 09:38:18,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:18,189 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 288 transitions. [2021-10-28 09:38:18,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 09:38:18,194 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:38:18,195 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:38:18,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:38:18,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-28 09:38:18,413 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr22REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 09:38:18,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:38:18,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1587295850, now seen corresponding path program 1 times [2021-10-28 09:38:18,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:38:18,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554765528] [2021-10-28 09:38:18,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:38:18,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:38:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:18,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:38:18,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:38:18,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:38:18,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554765528] [2021-10-28 09:38:18,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554765528] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:38:18,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521657871] [2021-10-28 09:38:18,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:38:18,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:38:18,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:38:18,788 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:38:18,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 09:38:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:19,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-28 09:38:19,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:38:19,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 09:38:19,186 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:38:19,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 09:38:19,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 09:38:19,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 09:38:19,378 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 09:38:19,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 44 [2021-10-28 09:38:19,393 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-28 09:38:19,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2021-10-28 09:38:19,520 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-28 09:38:19,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 23 [2021-10-28 09:38:19,644 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-10-28 09:38:19,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-10-28 09:38:21,828 INFO L354 Elim1Store]: treesize reduction 122, result has 19.7 percent of original size [2021-10-28 09:38:21,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 43 [2021-10-28 09:38:22,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2021-10-28 09:38:22,432 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-28 09:38:22,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 30 [2021-10-28 09:38:22,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:38:22,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521657871] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:38:22,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:38:22,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 32 [2021-10-28 09:38:22,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758894985] [2021-10-28 09:38:22,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-28 09:38:22,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:38:22,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-28 09:38:22,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 09:38:22,498 INFO L87 Difference]: Start difference. First operand 244 states and 288 transitions. Second operand has 33 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:45,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:38:45,621 INFO L93 Difference]: Finished difference Result 460 states and 516 transitions. [2021-10-28 09:38:45,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-28 09:38:45,622 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-10-28 09:38:45,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:38:45,624 INFO L225 Difference]: With dead ends: 460 [2021-10-28 09:38:45,625 INFO L226 Difference]: Without dead ends: 460 [2021-10-28 09:38:45,627 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=613, Invalid=3415, Unknown=4, NotChecked=0, Total=4032 [2021-10-28 09:38:45,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-10-28 09:38:45,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 249. [2021-10-28 09:38:45,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 200 states have (on average 1.46) internal successors, (292), 245 states have internal predecessors, (292), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:45,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 295 transitions. [2021-10-28 09:38:45,635 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 295 transitions. Word has length 40 [2021-10-28 09:38:45,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:38:45,635 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 295 transitions. [2021-10-28 09:38:45,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:45,636 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 295 transitions. [2021-10-28 09:38:45,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 09:38:45,637 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:38:45,637 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:38:45,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 09:38:45,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-28 09:38:45,853 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr21REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 09:38:45,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:38:45,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1587295851, now seen corresponding path program 1 times [2021-10-28 09:38:45,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:38:45,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145206896] [2021-10-28 09:38:45,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:38:45,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:38:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:45,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:38:45,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:38:45,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:38:45,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145206896] [2021-10-28 09:38:45,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145206896] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:38:45,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:38:45,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:38:45,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179605438] [2021-10-28 09:38:45,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:38:45,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:38:45,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:38:45,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:38:45,967 INFO L87 Difference]: Start difference. First operand 249 states and 295 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:46,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:38:46,315 INFO L93 Difference]: Finished difference Result 283 states and 335 transitions. [2021-10-28 09:38:46,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:38:46,315 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-10-28 09:38:46,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:38:46,317 INFO L225 Difference]: With dead ends: 283 [2021-10-28 09:38:46,317 INFO L226 Difference]: Without dead ends: 283 [2021-10-28 09:38:46,317 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:38:46,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-10-28 09:38:46,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 254. [2021-10-28 09:38:46,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 205 states have (on average 1.4634146341463414) internal successors, (300), 250 states have internal predecessors, (300), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:46,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 303 transitions. [2021-10-28 09:38:46,324 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 303 transitions. Word has length 40 [2021-10-28 09:38:46,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:38:46,325 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 303 transitions. [2021-10-28 09:38:46,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:46,325 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 303 transitions. [2021-10-28 09:38:46,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 09:38:46,326 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:38:46,326 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:38:46,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-28 09:38:46,327 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 09:38:46,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:38:46,327 INFO L85 PathProgramCache]: Analyzing trace with hash -371074441, now seen corresponding path program 1 times [2021-10-28 09:38:46,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:38:46,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076692650] [2021-10-28 09:38:46,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:38:46,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:38:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:46,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:38:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:46,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:38:46,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:38:46,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076692650] [2021-10-28 09:38:46,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076692650] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:38:46,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:38:46,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 09:38:46,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149580649] [2021-10-28 09:38:46,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:38:46,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:38:46,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:38:46,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:38:46,455 INFO L87 Difference]: Start difference. First operand 254 states and 303 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:46,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:38:46,867 INFO L93 Difference]: Finished difference Result 272 states and 322 transitions. [2021-10-28 09:38:46,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 09:38:46,868 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-10-28 09:38:46,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:38:46,869 INFO L225 Difference]: With dead ends: 272 [2021-10-28 09:38:46,869 INFO L226 Difference]: Without dead ends: 272 [2021-10-28 09:38:46,870 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:38:46,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-10-28 09:38:46,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 262. [2021-10-28 09:38:46,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 213 states have (on average 1.4507042253521127) internal successors, (309), 258 states have internal predecessors, (309), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:46,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 312 transitions. [2021-10-28 09:38:46,876 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 312 transitions. Word has length 40 [2021-10-28 09:38:46,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:38:46,877 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 312 transitions. [2021-10-28 09:38:46,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:46,877 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 312 transitions. [2021-10-28 09:38:46,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 09:38:46,878 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:38:46,878 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:38:46,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-28 09:38:46,878 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 09:38:46,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:38:46,879 INFO L85 PathProgramCache]: Analyzing trace with hash -371014859, now seen corresponding path program 1 times [2021-10-28 09:38:46,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:38:46,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495081982] [2021-10-28 09:38:46,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:38:46,880 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:38:46,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:46,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:38:46,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:46,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:38:46,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:38:46,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495081982] [2021-10-28 09:38:46,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495081982] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:38:46,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:38:46,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:38:46,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794094032] [2021-10-28 09:38:46,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:38:46,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:38:46,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:38:46,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:38:46,933 INFO L87 Difference]: Start difference. First operand 262 states and 312 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:47,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:38:47,124 INFO L93 Difference]: Finished difference Result 259 states and 304 transitions. [2021-10-28 09:38:47,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:38:47,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-10-28 09:38:47,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:38:47,126 INFO L225 Difference]: With dead ends: 259 [2021-10-28 09:38:47,126 INFO L226 Difference]: Without dead ends: 259 [2021-10-28 09:38:47,126 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:38:47,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-10-28 09:38:47,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2021-10-28 09:38:47,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 213 states have (on average 1.4131455399061033) internal successors, (301), 254 states have internal predecessors, (301), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:47,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 304 transitions. [2021-10-28 09:38:47,133 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 304 transitions. Word has length 40 [2021-10-28 09:38:47,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:38:47,134 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 304 transitions. [2021-10-28 09:38:47,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:47,134 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 304 transitions. [2021-10-28 09:38:47,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 09:38:47,135 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:38:47,135 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:38:47,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-28 09:38:47,135 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr37REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 09:38:47,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:38:47,136 INFO L85 PathProgramCache]: Analyzing trace with hash -371014858, now seen corresponding path program 1 times [2021-10-28 09:38:47,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:38:47,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268032384] [2021-10-28 09:38:47,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:38:47,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:38:47,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:47,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:38:47,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:38:47,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:38:47,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268032384] [2021-10-28 09:38:47,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268032384] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:38:47,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:38:47,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:38:47,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660382663] [2021-10-28 09:38:47,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:38:47,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:38:47,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:38:47,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:38:47,193 INFO L87 Difference]: Start difference. First operand 258 states and 304 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:47,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:38:47,396 INFO L93 Difference]: Finished difference Result 254 states and 296 transitions. [2021-10-28 09:38:47,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:38:47,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-10-28 09:38:47,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:38:47,398 INFO L225 Difference]: With dead ends: 254 [2021-10-28 09:38:47,398 INFO L226 Difference]: Without dead ends: 254 [2021-10-28 09:38:47,398 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:38:47,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-10-28 09:38:47,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-10-28 09:38:47,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 213 states have (on average 1.375586854460094) internal successors, (293), 250 states have internal predecessors, (293), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:47,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 296 transitions. [2021-10-28 09:38:47,408 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 296 transitions. Word has length 40 [2021-10-28 09:38:47,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:38:47,409 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 296 transitions. [2021-10-28 09:38:47,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:47,409 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 296 transitions. [2021-10-28 09:38:47,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-28 09:38:47,410 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:38:47,410 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:38:47,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-28 09:38:47,410 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr33REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 09:38:47,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:38:47,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1524461310, now seen corresponding path program 1 times [2021-10-28 09:38:47,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:38:47,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493290629] [2021-10-28 09:38:47,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:38:47,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:38:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:47,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:38:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:38:47,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:38:47,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493290629] [2021-10-28 09:38:47,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493290629] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:38:47,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:38:47,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:38:47,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356761528] [2021-10-28 09:38:47,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:38:47,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:38:47,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:38:47,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:38:47,482 INFO L87 Difference]: Start difference. First operand 254 states and 296 transitions. Second operand has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:47,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:38:47,853 INFO L93 Difference]: Finished difference Result 278 states and 320 transitions. [2021-10-28 09:38:47,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:38:47,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-10-28 09:38:47,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:38:47,855 INFO L225 Difference]: With dead ends: 278 [2021-10-28 09:38:47,855 INFO L226 Difference]: Without dead ends: 278 [2021-10-28 09:38:47,855 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:38:47,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-10-28 09:38:47,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 261. [2021-10-28 09:38:47,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 220 states have (on average 1.3863636363636365) internal successors, (305), 257 states have internal predecessors, (305), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:47,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 308 transitions. [2021-10-28 09:38:47,864 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 308 transitions. Word has length 44 [2021-10-28 09:38:47,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:38:47,864 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 308 transitions. [2021-10-28 09:38:47,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:47,864 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 308 transitions. [2021-10-28 09:38:47,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-28 09:38:47,865 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:38:47,865 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:38:47,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-28 09:38:47,866 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr34REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 09:38:47,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:38:47,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1524461309, now seen corresponding path program 1 times [2021-10-28 09:38:47,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:38:47,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239563791] [2021-10-28 09:38:47,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:38:47,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:38:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:48,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:38:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:38:48,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:38:48,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239563791] [2021-10-28 09:38:48,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239563791] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:38:48,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033700342] [2021-10-28 09:38:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:38:48,216 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:38:48,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:38:48,216 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:38:48,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 09:38:48,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:48,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 09:38:48,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:38:48,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-10-28 09:38:48,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-10-28 09:38:48,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:38:48,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033700342] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:38:48,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:38:48,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16] total 20 [2021-10-28 09:38:48,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850424334] [2021-10-28 09:38:48,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:38:48,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:38:48,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:38:48,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-10-28 09:38:48,824 INFO L87 Difference]: Start difference. First operand 261 states and 308 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:49,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:38:49,072 INFO L93 Difference]: Finished difference Result 274 states and 315 transitions. [2021-10-28 09:38:49,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:38:49,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-10-28 09:38:49,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:38:49,074 INFO L225 Difference]: With dead ends: 274 [2021-10-28 09:38:49,074 INFO L226 Difference]: Without dead ends: 274 [2021-10-28 09:38:49,074 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-10-28 09:38:49,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-10-28 09:38:49,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 259. [2021-10-28 09:38:49,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 220 states have (on average 1.3636363636363635) internal successors, (300), 255 states have internal predecessors, (300), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:49,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 303 transitions. [2021-10-28 09:38:49,085 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 303 transitions. Word has length 44 [2021-10-28 09:38:49,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:38:49,086 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 303 transitions. [2021-10-28 09:38:49,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:49,086 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 303 transitions. [2021-10-28 09:38:49,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-28 09:38:49,087 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:38:49,087 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:38:49,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:38:49,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:38:49,293 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr25REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 09:38:49,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:38:49,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1353350043, now seen corresponding path program 1 times [2021-10-28 09:38:49,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:38:49,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739503732] [2021-10-28 09:38:49,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:38:49,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:38:49,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:49,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:38:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:38:49,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:38:49,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739503732] [2021-10-28 09:38:49,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739503732] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:38:49,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280192621] [2021-10-28 09:38:49,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:38:49,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:38:49,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:38:49,645 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:38:49,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 09:38:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:38:49,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-28 09:38:49,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:38:49,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 09:38:50,068 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:38:50,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 09:38:50,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 09:38:50,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 09:38:50,267 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 09:38:50,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 44 [2021-10-28 09:38:50,281 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-28 09:38:50,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2021-10-28 09:38:50,578 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-10-28 09:38:50,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 77 [2021-10-28 09:38:50,603 INFO L354 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2021-10-28 09:38:50,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 78 [2021-10-28 09:38:50,775 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-28 09:38:50,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 65 [2021-10-28 09:38:50,783 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 09:38:50,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 44 [2021-10-28 09:38:51,458 INFO L354 Elim1Store]: treesize reduction 70, result has 9.1 percent of original size [2021-10-28 09:38:51,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 54 [2021-10-28 09:38:51,480 INFO L354 Elim1Store]: treesize reduction 54, result has 11.5 percent of original size [2021-10-28 09:38:51,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 32 [2021-10-28 09:38:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:38:51,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280192621] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:38:51,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:38:51,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-10-28 09:38:51,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884651819] [2021-10-28 09:38:51,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 09:38:51,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:38:51,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 09:38:51,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-10-28 09:38:51,504 INFO L87 Difference]: Start difference. First operand 259 states and 303 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:55,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:38:55,227 INFO L93 Difference]: Finished difference Result 419 states and 473 transitions. [2021-10-28 09:38:55,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-28 09:38:55,227 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-10-28 09:38:55,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:38:55,230 INFO L225 Difference]: With dead ends: 419 [2021-10-28 09:38:55,230 INFO L226 Difference]: Without dead ends: 419 [2021-10-28 09:38:55,231 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=420, Invalid=2886, Unknown=0, NotChecked=0, Total=3306 [2021-10-28 09:38:55,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-10-28 09:38:55,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 256. [2021-10-28 09:38:55,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 218 states have (on average 1.3440366972477065) internal successors, (293), 252 states have internal predecessors, (293), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:55,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 296 transitions. [2021-10-28 09:38:55,240 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 296 transitions. Word has length 44 [2021-10-28 09:38:55,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:38:55,240 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 296 transitions. [2021-10-28 09:38:55,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:38:55,240 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 296 transitions. [2021-10-28 09:38:55,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 09:38:55,241 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:38:55,241 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:38:55,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 09:38:55,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:38:55,457 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr35ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 09:38:55,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:38:55,457 INFO L85 PathProgramCache]: Analyzing trace with hash -423467038, now seen corresponding path program 1 times [2021-10-28 09:38:55,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:38:55,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748752579] [2021-10-28 09:38:55,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:38:55,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:38:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:38:55,505 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:38:55,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:38:55,575 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:38:55,575 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 09:38:55,576 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr35ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 09:38:55,578 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-28 09:38:55,578 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 09:38:55,578 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-28 09:38:55,579 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-28 09:38:55,579 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-28 09:38:55,579 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-28 09:38:55,579 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-28 09:38:55,579 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-28 09:38:55,579 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-28 09:38:55,580 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-28 09:38:55,580 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-28 09:38:55,580 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-28 09:38:55,580 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-28 09:38:55,581 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-28 09:38:55,581 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-28 09:38:55,581 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-28 09:38:55,581 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-28 09:38:55,581 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-28 09:38:55,581 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-28 09:38:55,581 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-28 09:38:55,582 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 09:38:55,582 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-28 09:38:55,582 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-10-28 09:38:55,582 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-10-28 09:38:55,582 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-10-28 09:38:55,583 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-10-28 09:38:55,583 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26REQUIRES_VIOLATION [2021-10-28 09:38:55,583 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION [2021-10-28 09:38:55,583 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION [2021-10-28 09:38:55,583 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION [2021-10-28 09:38:55,584 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30REQUIRES_VIOLATION [2021-10-28 09:38:55,584 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31REQUIRES_VIOLATION [2021-10-28 09:38:55,584 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32REQUIRES_VIOLATION [2021-10-28 09:38:55,584 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33REQUIRES_VIOLATION [2021-10-28 09:38:55,584 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34REQUIRES_VIOLATION [2021-10-28 09:38:55,584 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36REQUIRES_VIOLATION [2021-10-28 09:38:55,585 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37REQUIRES_VIOLATION [2021-10-28 09:38:55,585 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr38REQUIRES_VIOLATION [2021-10-28 09:38:55,585 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr39REQUIRES_VIOLATION [2021-10-28 09:38:55,585 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr40REQUIRES_VIOLATION [2021-10-28 09:38:55,585 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr41REQUIRES_VIOLATION [2021-10-28 09:38:55,585 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr42REQUIRES_VIOLATION [2021-10-28 09:38:55,586 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr43REQUIRES_VIOLATION [2021-10-28 09:38:55,586 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr44REQUIRES_VIOLATION [2021-10-28 09:38:55,586 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr45REQUIRES_VIOLATION [2021-10-28 09:38:55,586 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr46REQUIRES_VIOLATION [2021-10-28 09:38:55,586 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr47REQUIRES_VIOLATION [2021-10-28 09:38:55,586 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr48REQUIRES_VIOLATION [2021-10-28 09:38:55,586 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr49REQUIRES_VIOLATION [2021-10-28 09:38:55,587 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr50REQUIRES_VIOLATION [2021-10-28 09:38:55,587 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr51REQUIRES_VIOLATION [2021-10-28 09:38:55,587 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr52REQUIRES_VIOLATION [2021-10-28 09:38:55,587 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr53REQUIRES_VIOLATION [2021-10-28 09:38:55,587 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr54REQUIRES_VIOLATION [2021-10-28 09:38:55,587 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr55REQUIRES_VIOLATION [2021-10-28 09:38:55,588 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr56REQUIRES_VIOLATION [2021-10-28 09:38:55,588 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr57REQUIRES_VIOLATION [2021-10-28 09:38:55,588 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr58REQUIRES_VIOLATION [2021-10-28 09:38:55,588 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr59REQUIRES_VIOLATION [2021-10-28 09:38:55,588 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr60REQUIRES_VIOLATION [2021-10-28 09:38:55,588 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr61REQUIRES_VIOLATION [2021-10-28 09:38:55,589 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr62ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 09:38:55,589 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr63ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 09:38:55,589 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr64REQUIRES_VIOLATION [2021-10-28 09:38:55,589 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr65REQUIRES_VIOLATION [2021-10-28 09:38:55,589 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr66REQUIRES_VIOLATION [2021-10-28 09:38:55,589 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr67REQUIRES_VIOLATION [2021-10-28 09:38:55,590 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr68REQUIRES_VIOLATION [2021-10-28 09:38:55,590 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr69REQUIRES_VIOLATION [2021-10-28 09:38:55,590 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr70ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 09:38:55,590 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr71ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 09:38:55,590 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr72REQUIRES_VIOLATION [2021-10-28 09:38:55,590 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr73REQUIRES_VIOLATION [2021-10-28 09:38:55,591 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr74REQUIRES_VIOLATION [2021-10-28 09:38:55,591 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr75REQUIRES_VIOLATION [2021-10-28 09:38:55,591 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr76ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:38:55,591 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr77ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:38:55,591 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr78ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:38:55,592 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr79ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 09:38:55,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-28 09:38:55,595 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:38:55,599 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:38:55,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:38:55 BoogieIcfgContainer [2021-10-28 09:38:55,646 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:38:55,647 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:38:55,647 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:38:55,647 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:38:55,648 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:38:03" (3/4) ... [2021-10-28 09:38:55,649 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 09:38:55,687 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:38:55,688 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:38:55,689 INFO L168 Benchmark]: Toolchain (without parser) took 53638.67 ms. Allocated memory was 107.0 MB in the beginning and 211.8 MB in the end (delta: 104.9 MB). Free memory was 67.2 MB in the beginning and 156.4 MB in the end (delta: -89.2 MB). Peak memory consumption was 15.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:38:55,689 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 107.0 MB. Free memory is still 84.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:38:55,689 INFO L168 Benchmark]: CACSL2BoogieTranslator took 546.43 ms. Allocated memory is still 107.0 MB. Free memory was 66.9 MB in the beginning and 73.8 MB in the end (delta: -6.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-28 09:38:55,690 INFO L168 Benchmark]: Boogie Preprocessor took 113.32 ms. Allocated memory is still 107.0 MB. Free memory was 73.8 MB in the beginning and 70.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 09:38:55,690 INFO L168 Benchmark]: RCFGBuilder took 934.86 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 70.4 MB in the beginning and 102.7 MB in the end (delta: -32.3 MB). Peak memory consumption was 35.9 MB. Max. memory is 16.1 GB. [2021-10-28 09:38:55,691 INFO L168 Benchmark]: TraceAbstraction took 51995.98 ms. Allocated memory was 130.0 MB in the beginning and 211.8 MB in the end (delta: 81.8 MB). Free memory was 101.9 MB in the beginning and 159.5 MB in the end (delta: -57.6 MB). Peak memory consumption was 23.9 MB. Max. memory is 16.1 GB. [2021-10-28 09:38:55,691 INFO L168 Benchmark]: Witness Printer took 40.99 ms. Allocated memory is still 211.8 MB. Free memory was 159.5 MB in the beginning and 156.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:38:55,693 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 107.0 MB. Free memory is still 84.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 546.43 ms. Allocated memory is still 107.0 MB. Free memory was 66.9 MB in the beginning and 73.8 MB in the end (delta: -6.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 113.32 ms. Allocated memory is still 107.0 MB. Free memory was 73.8 MB in the beginning and 70.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 934.86 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 70.4 MB in the beginning and 102.7 MB in the end (delta: -32.3 MB). Peak memory consumption was 35.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 51995.98 ms. Allocated memory was 130.0 MB in the beginning and 211.8 MB in the end (delta: 81.8 MB). Free memory was 101.9 MB in the beginning and 159.5 MB in the end (delta: -57.6 MB). Peak memory consumption was 23.9 MB. Max. memory is 16.1 GB. * Witness Printer took 40.99 ms. Allocated memory is still 211.8 MB. Free memory was 159.5 MB in the beginning and 156.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 1038]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L997] SLL* head = malloc(sizeof(SLL)); [L998] head->next = ((void*)0) VAL [head={-1:0}] [L999] head->prev = ((void*)0) VAL [head={-1:0}] [L1000] head->data = 0 VAL [head={-1:0}] [L1002] SLL* x = head; [L1003] int marked = 0; VAL [head={-1:0}, marked=0, x={-1:0}] [L1006] COND TRUE __VERIFIER_nondet_int() || !marked [L1009] x->next = malloc(sizeof(SLL)) VAL [head={-1:0}, malloc(sizeof(SLL))={-2:0}, marked=0, x={-1:0}] [L1010] EXPR x->next VAL [head={-1:0}, marked=0, x={-1:0}, x->next={-2:0}] [L1010] x->next->prev = x VAL [head={-1:0}, marked=0, x={-1:0}, x->next={-2:0}] [L1011] EXPR x->next VAL [head={-1:0}, marked=0, x={-1:0}, x->next={-2:0}] [L1011] x = x->next [L1012] x->next = ((void*)0) VAL [head={-1:0}, marked=0, x={-2:0}] [L1014] COND TRUE __VERIFIER_nondet_int() [L1016] marked = 1 VAL [head={-1:0}, marked=1, x={-2:0}] [L1019] COND TRUE \read(marked) VAL [head={-1:0}, marked=1, x={-2:0}] [L1020] x->data = 1 VAL [head={-1:0}, marked=1, x={-2:0}] [L1006] COND FALSE !(__VERIFIER_nondet_int() || !marked) [L1025] x = head VAL [head={-1:0}, marked=1, x={-1:0}] [L1027] COND FALSE !(!(((void*)0) != x)) VAL [head={-1:0}, marked=1, x={-1:0}] [L1028] marked = 0 VAL [head={-1:0}, marked=0, x={-1:0}] [L1030] EXPR x->next VAL [head={-1:0}, marked=0, x={-1:0}, x->next={-2:0}] [L1030] x->next != ((void*)0) && x->next->data == 0 VAL [head={-1:0}, marked=0, x={-1:0}, x->next={-2:0}, x->next != ((void*)0) && x->next->data == 0=1] [L1030] EXPR x->next VAL [head={-1:0}, marked=0, x={-1:0}, x->next={-2:0}, x->next={-2:0}, x->next != ((void*)0) && x->next->data == 0=1] [L1030] EXPR x->next->data VAL [head={-1:0}, marked=0, x={-1:0}, x->next={-2:0}, x->next={-2:0}, x->next != ((void*)0) && x->next->data == 0=1, x->next->data=1] [L1030] x->next != ((void*)0) && x->next->data == 0 VAL [head={-1:0}, marked=0, x={-1:0}, x->next={-2:0}, x->next={-2:0}, x->next != ((void*)0) && x->next->data == 0=0, x->next->data=1] [L1030] COND FALSE !(x->next != ((void*)0) && x->next->data == 0) [L1035] EXPR x->next VAL [head={-1:0}, marked=0, x={-1:0}, x->next={-2:0}] [L1035] x->next != ((void*)0) && __VERIFIER_nondet_int() [L1035] x->next != ((void*)0) && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-3, head={-1:0}, marked=0, x={-1:0}, x->next={-2:0}, x->next != ((void*)0) && __VERIFIER_nondet_int()=1] [L1035] COND TRUE x->next != ((void*)0) && __VERIFIER_nondet_int() [L1037] EXPR x->next VAL [head={-1:0}, marked=0, x={-1:0}, x->next={-2:0}] [L1037] x = x->next [L1038] EXPR x->data VAL [head={-1:0}, marked=0, x={-2:0}, x->data=1] [L1038] COND TRUE !(x->data != 1) [L1038] reach_error() VAL [head={-1:0}, marked=0, x={-2:0}] - UnprovableResult [Line: 998]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 998]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 999]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 999]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1009]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1009]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1010]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1010]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1010]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1010]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1011]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1011]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1012]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1012]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1020]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1020]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1027]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1032]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1032]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1037]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1037]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1038]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1038]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1042]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1042]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1044]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1044]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1045]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1045]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1047]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1047]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1051]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1051]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1051]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1051]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1052]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1052]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1052]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1052]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1053]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1053]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1059]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1059]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1061]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1061]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1064]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1064]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1068]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1068]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1069]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1069]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1069]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1070]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1071]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1071]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1078]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1078]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1079]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1079]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1079]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 994]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 187 locations, 80 error locations. Started 1 CEGAR loops. OverallTime: 51.8s, OverallIterations: 21, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 37.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2304 SDtfs, 7038 SDslu, 7930 SDs, 0 SdLazy, 14445 SolverSat, 799 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 19.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 527 GetRequests, 189 SyntacticMatches, 8 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3031 ImplicationChecksByTransitivity, 20.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=262occurred in iteration=15, InterpolantAutomatonStates: 238, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 20 MinimizatonAttempts, 986 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 10.8s InterpolantComputationTime, 802 NumberOfCodeBlocks, 802 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 731 ConstructedInterpolants, 43 QuantifiedInterpolants, 8977 SizeOfPredicates, 68 NumberOfNonLiveVariables, 1097 ConjunctsInSsa, 169 ConjunctsInUnsatCore, 25 InterpolantComputations, 16 PerfectInterpolantSequences, 19/45 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-28 09:38:55,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4822035-f18a-4ad5-b77d-bdd58a9537cf/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...