./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/copysome1-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-programs/copysome1-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fba7b7c813943ca4d863bf010df4d3f1a074ecd1ac1791c737a4b5fb8e2d7ea1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:17:18,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:17:18,577 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:17:18,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:17:18,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:17:18,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:17:18,652 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:17:18,657 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:17:18,660 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:17:18,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:17:18,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:17:18,671 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:17:18,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:17:18,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:17:18,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:17:18,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:17:18,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:17:18,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:17:18,690 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:17:18,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:17:18,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:17:18,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:17:18,708 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:17:18,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:17:18,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:17:18,721 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:17:18,721 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:17:18,724 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:17:18,725 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:17:18,727 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:17:18,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:17:18,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:17:18,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:17:18,733 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:17:18,735 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:17:18,736 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:17:18,737 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:17:18,737 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:17:18,737 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:17:18,739 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:17:18,739 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:17:18,741 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 23:17:18,793 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:17:18,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:17:18,795 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:17:18,795 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:17:18,804 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:17:18,805 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:17:18,805 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:17:18,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:17:18,806 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:17:18,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:17:18,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:17:18,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:17:18,808 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:17:18,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:17:18,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:17:18,809 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:17:18,809 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:17:18,809 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:17:18,810 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:17:18,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:17:18,810 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:17:18,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:17:18,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:17:18,811 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:17:18,811 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:17:18,812 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:17:18,812 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:17:18,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:17:18,813 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:17:18,813 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:17:18,813 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:17:18,813 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:17:18,814 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_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fba7b7c813943ca4d863bf010df4d3f1a074ecd1ac1791c737a4b5fb8e2d7ea1 [2021-11-02 23:17:19,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:17:19,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:17:19,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:17:19,223 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:17:19,224 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:17:19,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/array-programs/copysome1-2.i [2021-11-02 23:17:19,307 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/data/a706f535e/22b101a97b434f3cbf583606664116a9/FLAG92e385b08 [2021-11-02 23:17:19,812 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:17:19,813 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/sv-benchmarks/c/array-programs/copysome1-2.i [2021-11-02 23:17:19,819 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/data/a706f535e/22b101a97b434f3cbf583606664116a9/FLAG92e385b08 [2021-11-02 23:17:20,166 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/data/a706f535e/22b101a97b434f3cbf583606664116a9 [2021-11-02 23:17:20,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:17:20,171 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:17:20,173 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:17:20,173 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:17:20,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:17:20,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:17:20" (1/1) ... [2021-11-02 23:17:20,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12e2ecaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:17:20, skipping insertion in model container [2021-11-02 23:17:20,180 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:17:20" (1/1) ... [2021-11-02 23:17:20,188 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:17:20,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:17:20,481 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_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/sv-benchmarks/c/array-programs/copysome1-2.i[805,818] [2021-11-02 23:17:20,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:17:20,512 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:17:20,523 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_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/sv-benchmarks/c/array-programs/copysome1-2.i[805,818] [2021-11-02 23:17:20,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:17:20,546 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:17:20,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:17:20 WrapperNode [2021-11-02 23:17:20,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:17:20,549 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:17:20,549 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:17:20,549 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:17:20,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:17:20" (1/1) ... [2021-11-02 23:17:20,566 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:17:20" (1/1) ... [2021-11-02 23:17:20,586 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:17:20,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:17:20,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:17:20,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:17:20,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:17:20" (1/1) ... [2021-11-02 23:17:20,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:17:20" (1/1) ... [2021-11-02 23:17:20,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:17:20" (1/1) ... [2021-11-02 23:17:20,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:17:20" (1/1) ... [2021-11-02 23:17:20,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:17:20" (1/1) ... [2021-11-02 23:17:20,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:17:20" (1/1) ... [2021-11-02 23:17:20,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:17:20" (1/1) ... [2021-11-02 23:17:20,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:17:20,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:17:20,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:17:20,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:17:20,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:17:20" (1/1) ... [2021-11-02 23:17:20,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:17:20,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:20,657 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:17:20,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:17:20,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:17:20,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:17:20,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 23:17:20,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:17:20,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:17:20,715 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 23:17:20,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 23:17:20,938 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:17:20,938 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-02 23:17:20,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:17:20 BoogieIcfgContainer [2021-11-02 23:17:20,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:17:20,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:17:20,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:17:20,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:17:20,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:17:20" (1/3) ... [2021-11-02 23:17:20,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b7ac76c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:17:20, skipping insertion in model container [2021-11-02 23:17:20,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:17:20" (2/3) ... [2021-11-02 23:17:20,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b7ac76c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:17:20, skipping insertion in model container [2021-11-02 23:17:20,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:17:20" (3/3) ... [2021-11-02 23:17:20,955 INFO L111 eAbstractionObserver]: Analyzing ICFG copysome1-2.i [2021-11-02 23:17:20,962 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:17:20,962 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 23:17:21,041 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:17:21,052 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 23:17:21,052 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 23:17:21,074 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:21,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 23:17:21,080 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:21,081 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:21,081 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:21,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:21,089 INFO L85 PathProgramCache]: Analyzing trace with hash -2060710478, now seen corresponding path program 1 times [2021-11-02 23:17:21,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:21,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251007070] [2021-11-02 23:17:21,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:21,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:21,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:17:21,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:21,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251007070] [2021-11-02 23:17:21,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251007070] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:17:21,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:17:21,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:17:21,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969776618] [2021-11-02 23:17:21,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:17:21,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:21,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:17:21,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:17:21,423 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:21,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:21,499 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2021-11-02 23:17:21,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:17:21,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-02 23:17:21,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:21,510 INFO L225 Difference]: With dead ends: 41 [2021-11-02 23:17:21,517 INFO L226 Difference]: Without dead ends: 21 [2021-11-02 23:17:21,520 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:17:21,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-02 23:17:21,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2021-11-02 23:17:21,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:21,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-02 23:17:21,562 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2021-11-02 23:17:21,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:21,563 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-02 23:17:21,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:21,564 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-02 23:17:21,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 23:17:21,565 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:21,565 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:21,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:17:21,566 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:21,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:21,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1458340319, now seen corresponding path program 1 times [2021-11-02 23:17:21,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:21,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757709743] [2021-11-02 23:17:21,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:21,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:21,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:17:21,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:21,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757709743] [2021-11-02 23:17:21,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757709743] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:21,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759492337] [2021-11-02 23:17:21,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:21,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:21,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:21,714 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:21,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 23:17:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:21,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:17:21,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:21,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:17:21,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759492337] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:21,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:21,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-02 23:17:22,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194936251] [2021-11-02 23:17:22,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:17:22,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:22,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:17:22,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:17:22,003 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:22,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:22,089 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-11-02 23:17:22,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:17:22,090 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-02 23:17:22,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:22,091 INFO L225 Difference]: With dead ends: 39 [2021-11-02 23:17:22,091 INFO L226 Difference]: Without dead ends: 26 [2021-11-02 23:17:22,092 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:17:22,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-02 23:17:22,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-11-02 23:17:22,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:22,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-11-02 23:17:22,098 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 15 [2021-11-02 23:17:22,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:22,098 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-11-02 23:17:22,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:22,099 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-11-02 23:17:22,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 23:17:22,100 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:22,100 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:22,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:22,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:22,306 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:22,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:22,307 INFO L85 PathProgramCache]: Analyzing trace with hash -2030845279, now seen corresponding path program 2 times [2021-11-02 23:17:22,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:22,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760644800] [2021-11-02 23:17:22,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:22,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:22,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:22,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 23:17:22,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:22,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760644800] [2021-11-02 23:17:22,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760644800] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:22,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863321569] [2021-11-02 23:17:22,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:17:22,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:22,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:22,418 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:22,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 23:17:22,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:17:22,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:22,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 23:17:22,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:22,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 23:17:22,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863321569] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:22,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:22,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-02 23:17:22,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080444474] [2021-11-02 23:17:22,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:17:22,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:22,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:17:22,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:17:22,621 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:22,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:22,737 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2021-11-02 23:17:22,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:17:22,739 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-02 23:17:22,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:22,742 INFO L225 Difference]: With dead ends: 47 [2021-11-02 23:17:22,743 INFO L226 Difference]: Without dead ends: 31 [2021-11-02 23:17:22,743 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:17:22,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-02 23:17:22,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-11-02 23:17:22,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:22,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-11-02 23:17:22,756 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 20 [2021-11-02 23:17:22,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:22,757 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-11-02 23:17:22,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:22,757 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-11-02 23:17:22,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 23:17:22,759 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:22,759 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:22,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:22,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:22,961 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:22,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:22,962 INFO L85 PathProgramCache]: Analyzing trace with hash -224231843, now seen corresponding path program 3 times [2021-11-02 23:17:22,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:22,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884223031] [2021-11-02 23:17:22,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:22,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-02 23:17:23,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:23,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884223031] [2021-11-02 23:17:23,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884223031] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:23,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948267532] [2021-11-02 23:17:23,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:17:23,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:23,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:23,067 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:23,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 23:17:23,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 23:17:23,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:23,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:17:23,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-02 23:17:23,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948267532] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:23,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:23,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-02 23:17:23,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998171367] [2021-11-02 23:17:23,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:17:23,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:23,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:17:23,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:17:23,258 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:23,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:23,337 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2021-11-02 23:17:23,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:17:23,338 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-02 23:17:23,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:23,344 INFO L225 Difference]: With dead ends: 55 [2021-11-02 23:17:23,344 INFO L226 Difference]: Without dead ends: 36 [2021-11-02 23:17:23,346 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:17:23,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-02 23:17:23,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-11-02 23:17:23,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:23,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-11-02 23:17:23,352 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 25 [2021-11-02 23:17:23,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:23,352 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-11-02 23:17:23,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:23,353 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-11-02 23:17:23,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 23:17:23,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:23,354 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:23,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:23,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:23,581 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:23,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:23,582 INFO L85 PathProgramCache]: Analyzing trace with hash -736833947, now seen corresponding path program 4 times [2021-11-02 23:17:23,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:23,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650845336] [2021-11-02 23:17:23,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:23,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:23,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-02 23:17:23,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:23,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650845336] [2021-11-02 23:17:23,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650845336] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:23,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480320192] [2021-11-02 23:17:23,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:17:23,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:23,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:23,745 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:23,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 23:17:23,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:17:23,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:23,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:17:23,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:23,990 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-02 23:17:23,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480320192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:23,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:24,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-02 23:17:24,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637900017] [2021-11-02 23:17:24,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:17:24,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:24,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:17:24,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:17:24,023 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:24,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:24,106 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2021-11-02 23:17:24,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:17:24,107 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-02 23:17:24,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:24,110 INFO L225 Difference]: With dead ends: 63 [2021-11-02 23:17:24,111 INFO L226 Difference]: Without dead ends: 41 [2021-11-02 23:17:24,114 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:17:24,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-02 23:17:24,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-11-02 23:17:24,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:24,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-11-02 23:17:24,125 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 30 [2021-11-02 23:17:24,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:24,125 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-11-02 23:17:24,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:24,126 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-11-02 23:17:24,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 23:17:24,127 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:24,128 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:24,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:24,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:24,349 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:24,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:24,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1407538841, now seen corresponding path program 5 times [2021-11-02 23:17:24,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:24,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969610016] [2021-11-02 23:17:24,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:24,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:24,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-02 23:17:24,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:24,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969610016] [2021-11-02 23:17:24,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969610016] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:24,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981184368] [2021-11-02 23:17:24,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:17:24,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:24,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:24,489 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:24,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 23:17:24,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-02 23:17:24,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:24,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:17:24,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-02 23:17:24,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981184368] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:24,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:24,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-02 23:17:24,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721332963] [2021-11-02 23:17:24,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:17:24,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:24,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:17:24,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:17:24,957 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:25,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:25,058 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2021-11-02 23:17:25,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:17:25,063 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-02 23:17:25,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:25,063 INFO L225 Difference]: With dead ends: 71 [2021-11-02 23:17:25,064 INFO L226 Difference]: Without dead ends: 46 [2021-11-02 23:17:25,064 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:17:25,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-02 23:17:25,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-11-02 23:17:25,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 42 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:25,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2021-11-02 23:17:25,071 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 35 [2021-11-02 23:17:25,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:25,072 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2021-11-02 23:17:25,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:25,072 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2021-11-02 23:17:25,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 23:17:25,073 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:25,073 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:25,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:25,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:25,285 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:25,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:25,286 INFO L85 PathProgramCache]: Analyzing trace with hash 968499753, now seen corresponding path program 6 times [2021-11-02 23:17:25,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:25,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061450986] [2021-11-02 23:17:25,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:25,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-02 23:17:25,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:25,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061450986] [2021-11-02 23:17:25,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061450986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:25,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315907328] [2021-11-02 23:17:25,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:17:25,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:25,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:25,509 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:25,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 23:17:25,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-02 23:17:25,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:25,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 23:17:25,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:25,923 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-02 23:17:25,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315907328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:25,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:25,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-02 23:17:25,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526854971] [2021-11-02 23:17:25,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:17:25,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:25,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:17:25,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:17:25,928 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:26,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:26,009 INFO L93 Difference]: Finished difference Result 79 states and 100 transitions. [2021-11-02 23:17:26,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:17:26,009 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-02 23:17:26,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:26,010 INFO L225 Difference]: With dead ends: 79 [2021-11-02 23:17:26,011 INFO L226 Difference]: Without dead ends: 51 [2021-11-02 23:17:26,011 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:17:26,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-02 23:17:26,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2021-11-02 23:17:26,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:26,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2021-11-02 23:17:26,018 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 40 [2021-11-02 23:17:26,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:26,018 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2021-11-02 23:17:26,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:26,019 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2021-11-02 23:17:26,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-02 23:17:26,020 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:26,020 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:26,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:26,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:26,234 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:26,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:26,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1016346923, now seen corresponding path program 7 times [2021-11-02 23:17:26,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:26,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735378902] [2021-11-02 23:17:26,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:26,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:26,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-02 23:17:26,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:26,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735378902] [2021-11-02 23:17:26,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735378902] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:26,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333628170] [2021-11-02 23:17:26,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:17:26,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:26,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:26,339 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:26,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 23:17:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:26,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 23:17:26,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:26,582 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-02 23:17:26,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333628170] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:26,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:26,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-02 23:17:26,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552778933] [2021-11-02 23:17:26,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:17:26,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:26,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:17:26,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:17:26,587 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:26,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:26,690 INFO L93 Difference]: Finished difference Result 87 states and 110 transitions. [2021-11-02 23:17:26,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:17:26,691 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-02 23:17:26,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:26,692 INFO L225 Difference]: With dead ends: 87 [2021-11-02 23:17:26,692 INFO L226 Difference]: Without dead ends: 56 [2021-11-02 23:17:26,693 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:17:26,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-02 23:17:26,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-11-02 23:17:26,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 52 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:26,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2021-11-02 23:17:26,699 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 45 [2021-11-02 23:17:26,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:26,700 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2021-11-02 23:17:26,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:26,700 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2021-11-02 23:17:26,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 23:17:26,702 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:26,702 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:26,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:26,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-02 23:17:26,925 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:26,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:26,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1143734803, now seen corresponding path program 8 times [2021-11-02 23:17:26,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:26,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134834863] [2021-11-02 23:17:26,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:26,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-02 23:17:27,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:27,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134834863] [2021-11-02 23:17:27,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134834863] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:27,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748164234] [2021-11-02 23:17:27,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:17:27,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:27,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:27,057 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:27,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 23:17:27,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:17:27,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:27,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 23:17:27,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:27,282 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-02 23:17:27,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748164234] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:27,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:27,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-02 23:17:27,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45548562] [2021-11-02 23:17:27,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:17:27,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:27,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:17:27,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:17:27,285 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:27,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:27,394 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2021-11-02 23:17:27,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 23:17:27,395 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-02 23:17:27,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:27,399 INFO L225 Difference]: With dead ends: 95 [2021-11-02 23:17:27,399 INFO L226 Difference]: Without dead ends: 61 [2021-11-02 23:17:27,400 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:17:27,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-02 23:17:27,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2021-11-02 23:17:27,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:27,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2021-11-02 23:17:27,413 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 50 [2021-11-02 23:17:27,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:27,414 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2021-11-02 23:17:27,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:27,414 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2021-11-02 23:17:27,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 23:17:27,415 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:27,415 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:27,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-02 23:17:27,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:27,616 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:27,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:27,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1908772625, now seen corresponding path program 9 times [2021-11-02 23:17:27,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:27,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410287651] [2021-11-02 23:17:27,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:27,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-02 23:17:27,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:27,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410287651] [2021-11-02 23:17:27,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410287651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:27,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52021611] [2021-11-02 23:17:27,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:17:27,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:27,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:27,834 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:27,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 23:17:30,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-02 23:17:30,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:30,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:17:30,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:30,357 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-02 23:17:30,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52021611] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:30,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:30,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-02 23:17:30,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70009533] [2021-11-02 23:17:30,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 23:17:30,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:30,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 23:17:30,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:17:30,361 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:30,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:30,449 INFO L93 Difference]: Finished difference Result 103 states and 130 transitions. [2021-11-02 23:17:30,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 23:17:30,449 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-02 23:17:30,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:30,451 INFO L225 Difference]: With dead ends: 103 [2021-11-02 23:17:30,452 INFO L226 Difference]: Without dead ends: 66 [2021-11-02 23:17:30,452 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:17:30,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-02 23:17:30,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2021-11-02 23:17:30,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 62 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:30,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-11-02 23:17:30,460 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 55 [2021-11-02 23:17:30,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:30,460 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-11-02 23:17:30,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:30,461 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-11-02 23:17:30,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-02 23:17:30,462 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:30,462 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:30,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:30,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 23:17:30,669 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:30,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:30,670 INFO L85 PathProgramCache]: Analyzing trace with hash -967663183, now seen corresponding path program 10 times [2021-11-02 23:17:30,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:30,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856446707] [2021-11-02 23:17:30,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:30,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:30,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:30,839 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-02 23:17:30,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:30,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856446707] [2021-11-02 23:17:30,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856446707] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:30,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446611009] [2021-11-02 23:17:30,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:17:30,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:30,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:30,841 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:30,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 23:17:31,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:17:31,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:31,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 23:17:31,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:31,242 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-02 23:17:31,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446611009] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:31,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:31,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-02 23:17:31,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10751667] [2021-11-02 23:17:31,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 23:17:31,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:31,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 23:17:31,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:17:31,245 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:31,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:31,346 INFO L93 Difference]: Finished difference Result 111 states and 140 transitions. [2021-11-02 23:17:31,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 23:17:31,346 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-02 23:17:31,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:31,347 INFO L225 Difference]: With dead ends: 111 [2021-11-02 23:17:31,347 INFO L226 Difference]: Without dead ends: 71 [2021-11-02 23:17:31,348 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:17:31,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-02 23:17:31,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2021-11-02 23:17:31,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 67 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:31,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2021-11-02 23:17:31,353 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 60 [2021-11-02 23:17:31,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:31,354 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2021-11-02 23:17:31,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:31,354 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2021-11-02 23:17:31,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 23:17:31,355 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:31,355 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:31,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:31,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-02 23:17:31,569 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:31,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:31,570 INFO L85 PathProgramCache]: Analyzing trace with hash -2055049395, now seen corresponding path program 11 times [2021-11-02 23:17:31,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:31,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161824023] [2021-11-02 23:17:31,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:31,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-02 23:17:31,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:31,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161824023] [2021-11-02 23:17:31,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161824023] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:31,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141346537] [2021-11-02 23:17:31,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:17:31,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:31,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:31,709 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:31,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 23:18:01,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-02 23:18:01,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:01,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 23:18:01,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-02 23:18:01,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141346537] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:01,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:01,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-02 23:18:01,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081360970] [2021-11-02 23:18:01,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 23:18:01,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:01,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 23:18:01,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:18:01,374 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:01,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:01,502 INFO L93 Difference]: Finished difference Result 119 states and 150 transitions. [2021-11-02 23:18:01,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:18:01,503 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-02 23:18:01,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:01,503 INFO L225 Difference]: With dead ends: 119 [2021-11-02 23:18:01,503 INFO L226 Difference]: Without dead ends: 76 [2021-11-02 23:18:01,504 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:18:01,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-02 23:18:01,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2021-11-02 23:18:01,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 72 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:01,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2021-11-02 23:18:01,510 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 65 [2021-11-02 23:18:01,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:01,510 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2021-11-02 23:18:01,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:01,511 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2021-11-02 23:18:01,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-02 23:18:01,513 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:01,513 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:01,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:01,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-02 23:18:01,725 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:01,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:01,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1898335605, now seen corresponding path program 12 times [2021-11-02 23:18:01,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:01,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062604018] [2021-11-02 23:18:01,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:01,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-02 23:18:01,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:01,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062604018] [2021-11-02 23:18:01,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062604018] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:01,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466588223] [2021-11-02 23:18:01,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:18:01,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:01,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:01,982 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:01,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 23:18:14,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-02 23:18:14,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:14,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 23:18:14,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:14,840 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-02 23:18:14,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466588223] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:14,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:14,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-02 23:18:14,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697120455] [2021-11-02 23:18:14,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 23:18:14,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:14,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 23:18:14,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:18:14,844 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:14,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:14,978 INFO L93 Difference]: Finished difference Result 127 states and 160 transitions. [2021-11-02 23:18:14,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 23:18:14,978 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-02 23:18:14,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:14,979 INFO L225 Difference]: With dead ends: 127 [2021-11-02 23:18:14,980 INFO L226 Difference]: Without dead ends: 81 [2021-11-02 23:18:14,980 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:18:14,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-02 23:18:14,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-11-02 23:18:14,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 77 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2021-11-02 23:18:14,987 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 70 [2021-11-02 23:18:14,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:14,987 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2021-11-02 23:18:14,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:14,988 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2021-11-02 23:18:14,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-02 23:18:14,989 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:14,989 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:15,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:15,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-02 23:18:15,190 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:15,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:15,191 INFO L85 PathProgramCache]: Analyzing trace with hash -684578935, now seen corresponding path program 13 times [2021-11-02 23:18:15,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:15,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119166094] [2021-11-02 23:18:15,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:15,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:15,391 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-02 23:18:15,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:15,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119166094] [2021-11-02 23:18:15,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119166094] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:15,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457528424] [2021-11-02 23:18:15,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:18:15,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:15,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:15,394 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:15,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 23:18:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:15,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 23:18:15,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:15,890 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-02 23:18:15,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457528424] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:15,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:15,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-02 23:18:15,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768509486] [2021-11-02 23:18:15,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:18:15,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:15,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:18:15,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:18:15,895 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:16,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:16,065 INFO L93 Difference]: Finished difference Result 135 states and 170 transitions. [2021-11-02 23:18:16,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:18:16,065 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-02 23:18:16,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:16,067 INFO L225 Difference]: With dead ends: 135 [2021-11-02 23:18:16,067 INFO L226 Difference]: Without dead ends: 86 [2021-11-02 23:18:16,067 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:18:16,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-02 23:18:16,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2021-11-02 23:18:16,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 82 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:16,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2021-11-02 23:18:16,087 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 75 [2021-11-02 23:18:16,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:16,088 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2021-11-02 23:18:16,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:16,088 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2021-11-02 23:18:16,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-02 23:18:16,092 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:16,093 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:16,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:16,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:16,313 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:16,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:16,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1002487495, now seen corresponding path program 14 times [2021-11-02 23:18:16,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:16,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465189427] [2021-11-02 23:18:16,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:16,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-02 23:18:16,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:16,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465189427] [2021-11-02 23:18:16,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465189427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:16,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828893881] [2021-11-02 23:18:16,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:18:16,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:16,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:16,578 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:16,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 23:18:16,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:18:16,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:16,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 23:18:16,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:17,100 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-02 23:18:17,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828893881] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:17,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:17,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-02 23:18:17,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911901898] [2021-11-02 23:18:17,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:18:17,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:17,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:18:17,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:18:17,103 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:17,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:17,257 INFO L93 Difference]: Finished difference Result 143 states and 180 transitions. [2021-11-02 23:18:17,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 23:18:17,258 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-02 23:18:17,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:17,259 INFO L225 Difference]: With dead ends: 143 [2021-11-02 23:18:17,259 INFO L226 Difference]: Without dead ends: 91 [2021-11-02 23:18:17,260 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:18:17,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-02 23:18:17,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2021-11-02 23:18:17,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.2183908045977012) internal successors, (106), 87 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:17,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2021-11-02 23:18:17,266 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 80 [2021-11-02 23:18:17,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:17,267 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2021-11-02 23:18:17,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:17,267 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2021-11-02 23:18:17,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-02 23:18:17,268 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:17,269 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:17,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:17,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 23:18:17,497 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:17,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:17,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1385924667, now seen corresponding path program 15 times [2021-11-02 23:18:17,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:17,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104854884] [2021-11-02 23:18:17,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:17,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-02 23:18:17,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:17,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104854884] [2021-11-02 23:18:17,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104854884] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:17,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70552727] [2021-11-02 23:18:17,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:18:17,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:17,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:17,732 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:17,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 23:18:45,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-02 23:18:45,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:45,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:18:45,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:45,521 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-02 23:18:45,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70552727] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:45,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:45,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-02 23:18:45,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119637174] [2021-11-02 23:18:45,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:18:45,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:45,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:18:45,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:18:45,524 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:45,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:45,679 INFO L93 Difference]: Finished difference Result 151 states and 190 transitions. [2021-11-02 23:18:45,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 23:18:45,680 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-02 23:18:45,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:45,682 INFO L225 Difference]: With dead ends: 151 [2021-11-02 23:18:45,682 INFO L226 Difference]: Without dead ends: 96 [2021-11-02 23:18:45,683 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:18:45,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-02 23:18:45,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2021-11-02 23:18:45,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.2173913043478262) internal successors, (112), 92 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:45,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2021-11-02 23:18:45,694 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 85 [2021-11-02 23:18:45,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:45,696 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2021-11-02 23:18:45,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:45,696 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2021-11-02 23:18:45,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-02 23:18:45,698 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:45,699 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:45,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:45,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 23:18:45,912 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:45,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:45,913 INFO L85 PathProgramCache]: Analyzing trace with hash -74597123, now seen corresponding path program 16 times [2021-11-02 23:18:45,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:45,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134298560] [2021-11-02 23:18:45,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:45,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:46,122 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-02 23:18:46,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:46,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134298560] [2021-11-02 23:18:46,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134298560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:46,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546338199] [2021-11-02 23:18:46,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:18:46,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:46,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:46,129 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:46,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 23:18:46,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:18:46,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:46,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 23:18:46,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:46,825 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-02 23:18:46,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546338199] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:46,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:46,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-02 23:18:46,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712229657] [2021-11-02 23:18:46,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:18:46,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:46,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:18:46,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:18:46,829 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:46,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:46,982 INFO L93 Difference]: Finished difference Result 159 states and 200 transitions. [2021-11-02 23:18:46,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 23:18:46,983 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-02 23:18:46,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:46,984 INFO L225 Difference]: With dead ends: 159 [2021-11-02 23:18:46,984 INFO L226 Difference]: Without dead ends: 101 [2021-11-02 23:18:46,985 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:18:46,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-02 23:18:46,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2021-11-02 23:18:46,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.2164948453608246) internal successors, (118), 97 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:46,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 118 transitions. [2021-11-02 23:18:46,996 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 118 transitions. Word has length 90 [2021-11-02 23:18:46,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:46,996 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 118 transitions. [2021-11-02 23:18:46,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:46,997 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 118 transitions. [2021-11-02 23:18:46,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-02 23:18:46,998 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:46,998 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:47,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:47,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 23:18:47,225 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:47,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:47,225 INFO L85 PathProgramCache]: Analyzing trace with hash 2024349697, now seen corresponding path program 17 times [2021-11-02 23:18:47,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:47,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180024808] [2021-11-02 23:18:47,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:47,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:47,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:47,497 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-11-02 23:18:47,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:47,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180024808] [2021-11-02 23:18:47,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180024808] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:47,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373128094] [2021-11-02 23:18:47,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:18:47,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:47,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:47,500 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:47,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f61c4c7-7d80-4f86-bfcd-8acb22bf54f7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process