./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2018/Problem11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2018/Problem11.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc --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 940624650400628fbc547d76c7cce642a9063fb1576962b71733623b165f113e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:32:03,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:32:03,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:32:03,574 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:32:03,576 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:32:03,581 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:32:03,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:32:03,588 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:32:03,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:32:03,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:32:03,596 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:32:03,599 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:32:03,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:32:03,601 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:32:03,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:32:03,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:32:03,604 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:32:03,605 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:32:03,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:32:03,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:32:03,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:32:03,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:32:03,620 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:32:03,621 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:32:03,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:32:03,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:32:03,639 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:32:03,641 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:32:03,642 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:32:03,643 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:32:03,644 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:32:03,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:32:03,648 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:32:03,650 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:32:03,651 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:32:03,653 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:32:03,654 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:32:03,654 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:32:03,655 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:32:03,656 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:32:03,657 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:32:03,658 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:32:03,706 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:32:03,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:32:03,711 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:32:03,711 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:32:03,713 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:32:03,713 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:32:03,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:32:03,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:32:03,715 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:32:03,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:32:03,717 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:32:03,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:32:03,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:32:03,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:32:03,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:32:03,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:32:03,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:32:03,719 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:32:03,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:32:03,719 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:32:03,719 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:32:03,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:32:03,720 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:32:03,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:32:03,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:32:03,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:32:03,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:32:03,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:32:03,724 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:32:03,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:32:03,724 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:32:03,724 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:32:03,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:32:03,725 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_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 940624650400628fbc547d76c7cce642a9063fb1576962b71733623b165f113e [2022-11-02 20:32:04,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:32:04,066 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:32:04,069 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:32:04,070 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:32:04,071 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:32:04,073 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/eca-rers2018/Problem11.c [2022-11-02 20:32:04,169 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/data/99782553c/765080027a084ad99e9f6b42e43dddee/FLAG11d67e71f [2022-11-02 20:32:05,018 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:32:05,019 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/sv-benchmarks/c/eca-rers2018/Problem11.c [2022-11-02 20:32:05,052 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/data/99782553c/765080027a084ad99e9f6b42e43dddee/FLAG11d67e71f [2022-11-02 20:32:05,111 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/data/99782553c/765080027a084ad99e9f6b42e43dddee [2022-11-02 20:32:05,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:32:05,116 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:32:05,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:32:05,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:32:05,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:32:05,126 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:32:05" (1/1) ... [2022-11-02 20:32:05,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6eb29704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:05, skipping insertion in model container [2022-11-02 20:32:05,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:32:05" (1/1) ... [2022-11-02 20:32:05,136 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:32:05,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:32:05,478 WARN L230 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_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/sv-benchmarks/c/eca-rers2018/Problem11.c[778,791] [2022-11-02 20:32:05,485 WARN L230 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_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/sv-benchmarks/c/eca-rers2018/Problem11.c[817,830] [2022-11-02 20:32:06,404 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:32:06,429 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:32:06,446 WARN L230 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_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/sv-benchmarks/c/eca-rers2018/Problem11.c[778,791] [2022-11-02 20:32:06,446 WARN L230 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_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/sv-benchmarks/c/eca-rers2018/Problem11.c[817,830] [2022-11-02 20:32:06,752 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:32:06,833 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:32:06,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:06 WrapperNode [2022-11-02 20:32:06,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:32:06,835 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:32:06,835 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:32:06,836 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:32:06,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:06" (1/1) ... [2022-11-02 20:32:06,899 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:06" (1/1) ... [2022-11-02 20:32:07,165 INFO L138 Inliner]: procedures = 286, calls = 252, calls flagged for inlining = 148, calls inlined = 148, statements flattened = 2260 [2022-11-02 20:32:07,165 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:32:07,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:32:07,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:32:07,167 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:32:07,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:06" (1/1) ... [2022-11-02 20:32:07,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:06" (1/1) ... [2022-11-02 20:32:07,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:06" (1/1) ... [2022-11-02 20:32:07,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:06" (1/1) ... [2022-11-02 20:32:07,340 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:06" (1/1) ... [2022-11-02 20:32:07,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:06" (1/1) ... [2022-11-02 20:32:07,513 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:06" (1/1) ... [2022-11-02 20:32:07,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:06" (1/1) ... [2022-11-02 20:32:07,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:32:07,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:32:07,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:32:07,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:32:07,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:06" (1/1) ... [2022-11-02 20:32:07,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:32:07,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:32:07,600 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:32:07,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:32:07,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:32:07,722 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2022-11-02 20:32:07,722 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2022-11-02 20:32:07,723 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2022-11-02 20:32:07,723 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2022-11-02 20:32:07,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:32:07,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:32:07,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:32:07,964 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:32:07,967 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:33:03,967 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:33:03,982 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:33:03,983 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:33:03,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:33:03 BoogieIcfgContainer [2022-11-02 20:33:03,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:33:03,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:33:03,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:33:03,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:33:03,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:32:05" (1/3) ... [2022-11-02 20:33:03,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64912144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:33:03, skipping insertion in model container [2022-11-02 20:33:03,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:06" (2/3) ... [2022-11-02 20:33:03,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64912144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:33:03, skipping insertion in model container [2022-11-02 20:33:03,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:33:03" (3/3) ... [2022-11-02 20:33:03,998 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11.c [2022-11-02 20:33:04,019 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:33:04,020 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-02 20:33:04,115 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:33:04,122 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6550bd12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:33:04,122 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:33:04,131 INFO L276 IsEmpty]: Start isEmpty. Operand has 705 states, 600 states have (on average 1.5866666666666667) internal successors, (952), 602 states have internal predecessors, (952), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-02 20:33:04,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-02 20:33:04,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:04,144 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:04,145 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:04,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:04,151 INFO L85 PathProgramCache]: Analyzing trace with hash -295136918, now seen corresponding path program 1 times [2022-11-02 20:33:04,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:33:04,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307419076] [2022-11-02 20:33:04,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:04,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:33:04,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:05,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:05,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:33:05,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307419076] [2022-11-02 20:33:05,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307419076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:33:05,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:33:05,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:33:05,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520901945] [2022-11-02 20:33:05,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:33:05,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:33:05,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:33:05,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:33:05,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:33:05,135 INFO L87 Difference]: Start difference. First operand has 705 states, 600 states have (on average 1.5866666666666667) internal successors, (952), 602 states have internal predecessors, (952), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:08,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:33:10,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:33:13,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:33:15,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:33:18,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:33:24,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:33:26,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:33:29,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:33:31,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:33:32,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:33:34,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:33:36,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:33:38,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:33:41,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:33:42,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:33:44,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:33:45,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:33:47,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:33:49,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:33:51,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:33:53,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:33:55,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:33:58,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:00,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:02,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:04,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:06,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:08,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:10,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:12,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:12,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:34:12,876 INFO L93 Difference]: Finished difference Result 1476 states and 2516 transitions. [2022-11-02 20:34:12,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:34:12,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-02 20:34:12,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:34:12,908 INFO L225 Difference]: With dead ends: 1476 [2022-11-02 20:34:12,909 INFO L226 Difference]: Without dead ends: 767 [2022-11-02 20:34:12,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:34:12,920 INFO L413 NwaCegarLoop]: 724 mSDtfsCounter, 177 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 108 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1328 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:34:12,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 1328 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1214 Invalid, 20 Unknown, 0 Unchecked, 67.5s Time] [2022-11-02 20:34:12,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-11-02 20:34:13,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 732. [2022-11-02 20:34:13,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 630 states have (on average 1.4285714285714286) internal successors, (900), 729 states have internal predecessors, (900), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:13,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1000 transitions. [2022-11-02 20:34:13,017 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1000 transitions. Word has length 16 [2022-11-02 20:34:13,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:34:13,017 INFO L495 AbstractCegarLoop]: Abstraction has 732 states and 1000 transitions. [2022-11-02 20:34:13,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:13,018 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1000 transitions. [2022-11-02 20:34:13,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-02 20:34:13,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:34:13,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:13,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:34:13,021 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:34:13,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:13,022 INFO L85 PathProgramCache]: Analyzing trace with hash 733246357, now seen corresponding path program 1 times [2022-11-02 20:34:13,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:13,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718842101] [2022-11-02 20:34:13,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:13,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:13,051 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:34:13,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734654809] [2022-11-02 20:34:13,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:13,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:13,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:13,059 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:13,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:34:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:13,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:34:13,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:13,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:34:13,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:13,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718842101] [2022-11-02 20:34:13,390 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:34:13,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734654809] [2022-11-02 20:34:13,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734654809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:34:13,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:34:13,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:34:13,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508332562] [2022-11-02 20:34:13,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:34:13,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:34:13,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:13,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:34:13,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:34:13,397 INFO L87 Difference]: Start difference. First operand 732 states and 1000 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:13,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:34:13,544 INFO L93 Difference]: Finished difference Result 1893 states and 2649 transitions. [2022-11-02 20:34:13,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:34:13,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-02 20:34:13,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:34:13,557 INFO L225 Difference]: With dead ends: 1893 [2022-11-02 20:34:13,557 INFO L226 Difference]: Without dead ends: 1297 [2022-11-02 20:34:13,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:34:13,563 INFO L413 NwaCegarLoop]: 853 mSDtfsCounter, 777 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 1684 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:34:13,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [777 Valid, 1684 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:34:13,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2022-11-02 20:34:13,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1187. [2022-11-02 20:34:13,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1085 states have (on average 1.4663594470046082) internal successors, (1591), 1184 states have internal predecessors, (1591), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:13,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 1691 transitions. [2022-11-02 20:34:13,624 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 1691 transitions. Word has length 24 [2022-11-02 20:34:13,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:34:13,624 INFO L495 AbstractCegarLoop]: Abstraction has 1187 states and 1691 transitions. [2022-11-02 20:34:13,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:13,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 1691 transitions. [2022-11-02 20:34:13,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 20:34:13,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:34:13,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:13,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:34:13,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:13,851 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:34:13,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:13,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1255084462, now seen corresponding path program 1 times [2022-11-02 20:34:13,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:13,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917248226] [2022-11-02 20:34:13,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:13,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:13,873 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:34:13,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399293902] [2022-11-02 20:34:13,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:13,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:13,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:13,875 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:13,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:34:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:14,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:34:14,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:14,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:14,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:34:14,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:14,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917248226] [2022-11-02 20:34:14,130 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:34:14,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399293902] [2022-11-02 20:34:14,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399293902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:34:14,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:34:14,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:34:14,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202700014] [2022-11-02 20:34:14,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:34:14,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:34:14,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:14,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:34:14,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:34:14,133 INFO L87 Difference]: Start difference. First operand 1187 states and 1691 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:16,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:16,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:34:16,626 INFO L93 Difference]: Finished difference Result 2230 states and 3211 transitions. [2022-11-02 20:34:16,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:34:16,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-02 20:34:16,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:34:16,639 INFO L225 Difference]: With dead ends: 2230 [2022-11-02 20:34:16,639 INFO L226 Difference]: Without dead ends: 2217 [2022-11-02 20:34:16,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:34:16,641 INFO L413 NwaCegarLoop]: 867 mSDtfsCounter, 803 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 1674 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:34:16,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [803 Valid, 1674 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 38 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-02 20:34:16,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2217 states. [2022-11-02 20:34:16,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2217 to 2124. [2022-11-02 20:34:16,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 2022 states have (on average 1.4792284866468843) internal successors, (2991), 2121 states have internal predecessors, (2991), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:16,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 3091 transitions. [2022-11-02 20:34:16,742 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 3091 transitions. Word has length 25 [2022-11-02 20:34:16,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:34:16,743 INFO L495 AbstractCegarLoop]: Abstraction has 2124 states and 3091 transitions. [2022-11-02 20:34:16,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:16,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 3091 transitions. [2022-11-02 20:34:16,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 20:34:16,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:34:16,751 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:16,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:34:16,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-02 20:34:16,952 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:34:16,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:16,952 INFO L85 PathProgramCache]: Analyzing trace with hash 252203415, now seen corresponding path program 1 times [2022-11-02 20:34:16,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:16,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337239809] [2022-11-02 20:34:16,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:16,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:16,988 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:34:16,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127751800] [2022-11-02 20:34:16,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:16,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:16,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:16,990 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:17,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:34:17,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:17,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:34:17,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:17,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:34:17,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:17,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337239809] [2022-11-02 20:34:17,252 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:34:17,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127751800] [2022-11-02 20:34:17,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127751800] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:34:17,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:34:17,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:34:17,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798711234] [2022-11-02 20:34:17,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:34:17,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:34:17,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:17,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:34:17,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:34:17,260 INFO L87 Difference]: Start difference. First operand 2124 states and 3091 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:19,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:21,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:24,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:25,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:27,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:30,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:32,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:34,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:36,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:38,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:40,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:41,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:43,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:45,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:47,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:49,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:51,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:34:51,009 INFO L93 Difference]: Finished difference Result 5971 states and 8790 transitions. [2022-11-02 20:34:51,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:34:51,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-02 20:34:51,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:34:51,029 INFO L225 Difference]: With dead ends: 5971 [2022-11-02 20:34:51,029 INFO L226 Difference]: Without dead ends: 3983 [2022-11-02 20:34:51,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:34:51,039 INFO L413 NwaCegarLoop]: 927 mSDtfsCounter, 760 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 41 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 1631 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:34:51,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 1631 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 131 Invalid, 11 Unknown, 0 Unchecked, 33.7s Time] [2022-11-02 20:34:51,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3983 states. [2022-11-02 20:34:51,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3983 to 3758. [2022-11-02 20:34:51,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3758 states, 3656 states have (on average 1.5090262582056893) internal successors, (5517), 3755 states have internal predecessors, (5517), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:51,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3758 states to 3758 states and 5617 transitions. [2022-11-02 20:34:51,186 INFO L78 Accepts]: Start accepts. Automaton has 3758 states and 5617 transitions. Word has length 26 [2022-11-02 20:34:51,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:34:51,187 INFO L495 AbstractCegarLoop]: Abstraction has 3758 states and 5617 transitions. [2022-11-02 20:34:51,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:51,188 INFO L276 IsEmpty]: Start isEmpty. Operand 3758 states and 5617 transitions. [2022-11-02 20:34:51,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:34:51,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:34:51,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:51,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:34:51,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:51,411 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:34:51,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:51,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1845510924, now seen corresponding path program 1 times [2022-11-02 20:34:51,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:51,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238737595] [2022-11-02 20:34:51,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:51,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:51,440 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:34:51,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822660240] [2022-11-02 20:34:51,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:51,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:51,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:51,443 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:51,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:34:51,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:51,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:34:51,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:51,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:34:51,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:51,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238737595] [2022-11-02 20:34:51,675 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:34:51,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822660240] [2022-11-02 20:34:51,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822660240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:34:51,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:34:51,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:34:51,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277390157] [2022-11-02 20:34:51,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:34:51,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:34:51,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:51,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:34:51,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:34:51,678 INFO L87 Difference]: Start difference. First operand 3758 states and 5617 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:53,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:55,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:57,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:34:59,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:35:01,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:35:01,216 INFO L93 Difference]: Finished difference Result 11045 states and 16558 transitions. [2022-11-02 20:35:01,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:35:01,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-02 20:35:01,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:35:01,247 INFO L225 Difference]: With dead ends: 11045 [2022-11-02 20:35:01,247 INFO L226 Difference]: Without dead ends: 7289 [2022-11-02 20:35:01,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:35:01,254 INFO L413 NwaCegarLoop]: 1498 mSDtfsCounter, 805 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 2321 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:35:01,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [805 Valid, 2321 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 4 Unknown, 0 Unchecked, 9.4s Time] [2022-11-02 20:35:01,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7289 states. [2022-11-02 20:35:01,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7289 to 6981. [2022-11-02 20:35:01,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6981 states, 6879 states have (on average 1.525948539031836) internal successors, (10497), 6978 states have internal predecessors, (10497), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:01,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6981 states to 6981 states and 10597 transitions. [2022-11-02 20:35:01,428 INFO L78 Accepts]: Start accepts. Automaton has 6981 states and 10597 transitions. Word has length 27 [2022-11-02 20:35:01,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:35:01,428 INFO L495 AbstractCegarLoop]: Abstraction has 6981 states and 10597 transitions. [2022-11-02 20:35:01,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:01,429 INFO L276 IsEmpty]: Start isEmpty. Operand 6981 states and 10597 transitions. [2022-11-02 20:35:01,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:35:01,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:35:01,430 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:01,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:35:01,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:35:01,646 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:35:01,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:01,646 INFO L85 PathProgramCache]: Analyzing trace with hash -772331178, now seen corresponding path program 1 times [2022-11-02 20:35:01,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:35:01,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622900846] [2022-11-02 20:35:01,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:01,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:35:01,711 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:35:01,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667175805] [2022-11-02 20:35:01,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:01,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:35:01,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:35:01,713 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:35:01,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:35:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:01,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:35:01,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:35:01,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:01,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:35:01,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:35:01,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622900846] [2022-11-02 20:35:01,978 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:35:01,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667175805] [2022-11-02 20:35:01,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667175805] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:35:01,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:35:01,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:35:01,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281136554] [2022-11-02 20:35:01,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:35:01,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:35:01,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:35:01,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:35:01,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:35:01,982 INFO L87 Difference]: Start difference. First operand 6981 states and 10597 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:04,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:35:06,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:35:06,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:35:06,678 INFO L93 Difference]: Finished difference Result 20410 states and 31110 transitions. [2022-11-02 20:35:06,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:35:06,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-02 20:35:06,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:35:06,807 INFO L225 Difference]: With dead ends: 20410 [2022-11-02 20:35:06,807 INFO L226 Difference]: Without dead ends: 13558 [2022-11-02 20:35:06,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:35:06,817 INFO L413 NwaCegarLoop]: 847 mSDtfsCounter, 787 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 1677 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:35:06,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 1677 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2022-11-02 20:35:06,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13558 states. [2022-11-02 20:35:07,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13558 to 13409. [2022-11-02 20:35:07,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13409 states, 13307 states have (on average 1.5285939730968663) internal successors, (20341), 13406 states have internal predecessors, (20341), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:07,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13409 states to 13409 states and 20441 transitions. [2022-11-02 20:35:07,417 INFO L78 Accepts]: Start accepts. Automaton has 13409 states and 20441 transitions. Word has length 27 [2022-11-02 20:35:07,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:35:07,417 INFO L495 AbstractCegarLoop]: Abstraction has 13409 states and 20441 transitions. [2022-11-02 20:35:07,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:07,419 INFO L276 IsEmpty]: Start isEmpty. Operand 13409 states and 20441 transitions. [2022-11-02 20:35:07,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:35:07,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:35:07,420 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:07,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:35:07,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 20:35:07,647 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:35:07,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:07,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1121479118, now seen corresponding path program 1 times [2022-11-02 20:35:07,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:35:07,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116778510] [2022-11-02 20:35:07,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:07,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:35:07,669 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:35:07,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1770495858] [2022-11-02 20:35:07,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:07,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:35:07,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:35:07,672 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:35:07,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:35:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:07,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:35:07,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:35:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:07,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:35:07,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:35:07,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116778510] [2022-11-02 20:35:07,896 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:35:07,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770495858] [2022-11-02 20:35:07,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770495858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:35:07,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:35:07,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:35:07,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376095776] [2022-11-02 20:35:07,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:35:07,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:35:07,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:35:07,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:35:07,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:35:07,899 INFO L87 Difference]: Start difference. First operand 13409 states and 20441 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:11,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:35:13,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:35:15,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:35:17,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:35:19,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:35:21,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:35:23,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:35:25,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:35:27,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:35:30,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:35:32,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:35:32,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:35:32,730 INFO L93 Difference]: Finished difference Result 35057 states and 54469 transitions. [2022-11-02 20:35:32,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:35:32,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-02 20:35:32,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:35:32,805 INFO L225 Difference]: With dead ends: 35057 [2022-11-02 20:35:32,806 INFO L226 Difference]: Without dead ends: 21777 [2022-11-02 20:35:32,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:35:32,819 INFO L413 NwaCegarLoop]: 1068 mSDtfsCounter, 627 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 51 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 1769 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:35:32,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 1769 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 120 Invalid, 11 Unknown, 0 Unchecked, 24.5s Time] [2022-11-02 20:35:32,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21777 states. [2022-11-02 20:35:33,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21777 to 21353. [2022-11-02 20:35:33,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21353 states, 21251 states have (on average 1.5538562891158063) internal successors, (33021), 21350 states have internal predecessors, (33021), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:33,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21353 states to 21353 states and 33121 transitions. [2022-11-02 20:35:33,415 INFO L78 Accepts]: Start accepts. Automaton has 21353 states and 33121 transitions. Word has length 28 [2022-11-02 20:35:33,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:35:33,416 INFO L495 AbstractCegarLoop]: Abstraction has 21353 states and 33121 transitions. [2022-11-02 20:35:33,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:33,417 INFO L276 IsEmpty]: Start isEmpty. Operand 21353 states and 33121 transitions. [2022-11-02 20:35:33,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:35:33,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:35:33,418 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:33,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:35:33,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:35:33,619 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:35:33,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:33,619 INFO L85 PathProgramCache]: Analyzing trace with hash -2132596368, now seen corresponding path program 1 times [2022-11-02 20:35:33,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:35:33,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777199903] [2022-11-02 20:35:33,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:33,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:35:33,661 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:35:33,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856929593] [2022-11-02 20:35:33,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:33,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:35:33,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:35:33,683 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:35:33,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:35:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:34,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:35:34,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:35:34,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:34,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:35:34,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:35:34,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777199903] [2022-11-02 20:35:34,076 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:35:34,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856929593] [2022-11-02 20:35:34,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856929593] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:35:34,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:35:34,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:35:34,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115724056] [2022-11-02 20:35:34,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:35:34,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:35:34,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:35:34,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:35:34,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:35:34,081 INFO L87 Difference]: Start difference. First operand 21353 states and 33121 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:34,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:35:34,602 INFO L93 Difference]: Finished difference Result 42293 states and 65705 transitions. [2022-11-02 20:35:34,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:35:34,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-02 20:35:34,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:35:34,761 INFO L225 Difference]: With dead ends: 42293 [2022-11-02 20:35:34,762 INFO L226 Difference]: Without dead ends: 42287 [2022-11-02 20:35:34,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:35:34,772 INFO L413 NwaCegarLoop]: 872 mSDtfsCounter, 831 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 1688 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:35:34,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 1688 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:35:34,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42287 states. [2022-11-02 20:35:35,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42287 to 42041. [2022-11-02 20:35:36,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42041 states, 41939 states have (on average 1.556856386656811) internal successors, (65293), 42038 states have internal predecessors, (65293), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:36,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42041 states to 42041 states and 65393 transitions. [2022-11-02 20:35:36,338 INFO L78 Accepts]: Start accepts. Automaton has 42041 states and 65393 transitions. Word has length 28 [2022-11-02 20:35:36,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:35:36,339 INFO L495 AbstractCegarLoop]: Abstraction has 42041 states and 65393 transitions. [2022-11-02 20:35:36,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:36,339 INFO L276 IsEmpty]: Start isEmpty. Operand 42041 states and 65393 transitions. [2022-11-02 20:35:36,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-02 20:35:36,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:35:36,342 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:36,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:35:36,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:35:36,559 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:35:36,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:36,559 INFO L85 PathProgramCache]: Analyzing trace with hash 796822779, now seen corresponding path program 1 times [2022-11-02 20:35:36,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:35:36,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474378660] [2022-11-02 20:35:36,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:36,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:35:36,592 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:35:36,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1284225466] [2022-11-02 20:35:36,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:36,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:35:36,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:35:36,596 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:35:36,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:35:36,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:36,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:35:36,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:35:36,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:36,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:35:36,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:35:36,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474378660] [2022-11-02 20:35:36,942 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:35:36,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284225466] [2022-11-02 20:35:36,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284225466] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:35:36,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:35:36,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:35:36,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753624479] [2022-11-02 20:35:36,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:35:36,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:35:36,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:35:36,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:35:36,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:35:36,948 INFO L87 Difference]: Start difference. First operand 42041 states and 65393 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:39,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:35:41,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:35:43,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:35:45,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:35:47,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:35:49,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:35:51,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:35:53,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:35:55,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:35:56,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:35:56,031 INFO L93 Difference]: Finished difference Result 123495 states and 192763 transitions. [2022-11-02 20:35:56,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:35:56,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-02 20:35:56,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:35:56,230 INFO L225 Difference]: With dead ends: 123495 [2022-11-02 20:35:56,230 INFO L226 Difference]: Without dead ends: 81583 [2022-11-02 20:35:56,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:35:56,272 INFO L413 NwaCegarLoop]: 895 mSDtfsCounter, 760 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 1713 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:35:56,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 1713 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 8 Unknown, 0 Unchecked, 18.4s Time] [2022-11-02 20:35:56,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81583 states. [2022-11-02 20:35:57,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81583 to 80585. [2022-11-02 20:35:58,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80585 states, 80483 states have (on average 1.5651131294807599) internal successors, (125965), 80582 states have internal predecessors, (125965), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:58,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80585 states to 80585 states and 126065 transitions. [2022-11-02 20:35:58,322 INFO L78 Accepts]: Start accepts. Automaton has 80585 states and 126065 transitions. Word has length 29 [2022-11-02 20:35:58,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:35:58,324 INFO L495 AbstractCegarLoop]: Abstraction has 80585 states and 126065 transitions. [2022-11-02 20:35:58,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:58,325 INFO L276 IsEmpty]: Start isEmpty. Operand 80585 states and 126065 transitions. [2022-11-02 20:35:58,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-02 20:35:58,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:35:58,329 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:58,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:35:58,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:35:58,543 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:35:58,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:58,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1068979804, now seen corresponding path program 1 times [2022-11-02 20:35:58,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:35:58,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235773265] [2022-11-02 20:35:58,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:58,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:35:58,568 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:35:58,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665055501] [2022-11-02 20:35:58,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:58,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:35:58,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:35:58,571 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:35:58,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:35:58,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:58,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:35:58,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:35:58,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:58,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:35:58,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:35:58,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235773265] [2022-11-02 20:35:58,857 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:35:58,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665055501] [2022-11-02 20:35:58,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665055501] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:35:58,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:35:58,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:35:58,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218875360] [2022-11-02 20:35:58,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:35:58,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:35:58,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:35:58,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:35:58,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:35:58,863 INFO L87 Difference]: Start difference. First operand 80585 states and 126065 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:00,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:00,320 INFO L93 Difference]: Finished difference Result 161041 states and 251990 transitions. [2022-11-02 20:36:00,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:36:00,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-02 20:36:00,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:00,634 INFO L225 Difference]: With dead ends: 161041 [2022-11-02 20:36:00,634 INFO L226 Difference]: Without dead ends: 161038 [2022-11-02 20:36:00,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:36:00,664 INFO L413 NwaCegarLoop]: 840 mSDtfsCounter, 815 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 1672 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:00,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [815 Valid, 1672 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:36:00,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161038 states. [2022-11-02 20:36:03,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161038 to 160233. [2022-11-02 20:36:03,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160233 states, 160131 states have (on average 1.5663987610144194) internal successors, (250829), 160230 states have internal predecessors, (250829), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:04,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160233 states to 160233 states and 250929 transitions. [2022-11-02 20:36:04,247 INFO L78 Accepts]: Start accepts. Automaton has 160233 states and 250929 transitions. Word has length 30 [2022-11-02 20:36:04,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:04,248 INFO L495 AbstractCegarLoop]: Abstraction has 160233 states and 250929 transitions. [2022-11-02 20:36:04,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:04,249 INFO L276 IsEmpty]: Start isEmpty. Operand 160233 states and 250929 transitions. [2022-11-02 20:36:04,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-02 20:36:04,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:04,250 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:04,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-02 20:36:04,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:04,463 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:04,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:04,463 INFO L85 PathProgramCache]: Analyzing trace with hash -814013527, now seen corresponding path program 1 times [2022-11-02 20:36:04,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:04,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984530056] [2022-11-02 20:36:04,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:04,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:04,498 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:36:04,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564353092] [2022-11-02 20:36:04,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:04,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:04,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:04,508 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:04,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab126301-0ba7-4b34-bf35-41e68f9c5d9e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:36:04,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:04,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:36:04,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:04,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:04,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:36:04,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:04,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984530056] [2022-11-02 20:36:04,777 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:36:04,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564353092] [2022-11-02 20:36:04,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564353092] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:04,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:04,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:36:04,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283418786] [2022-11-02 20:36:04,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:04,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:36:04,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:04,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:36:04,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:36:04,780 INFO L87 Difference]: Start difference. First operand 160233 states and 250929 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:06,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:06,811 INFO L93 Difference]: Finished difference Result 320337 states and 501718 transitions. [2022-11-02 20:36:06,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:36:06,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-02 20:36:06,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:07,414 INFO L225 Difference]: With dead ends: 320337 [2022-11-02 20:36:07,414 INFO L226 Difference]: Without dead ends: 320333 [2022-11-02 20:36:07,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:36:07,472 INFO L413 NwaCegarLoop]: 841 mSDtfsCounter, 812 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 1674 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:07,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 1674 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:36:07,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320333 states. [2022-11-02 20:36:11,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320333 to 319209. [2022-11-02 20:36:12,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319209 states, 319107 states have (on average 1.5652085350681746) internal successors, (499469), 319206 states have internal predecessors, (499469), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)